106 MODEL AVIATION
I AM FRUSTRATED by the long, cold, and miserable winter of
2004. The Northeast weather has again delayed the first flight of the
Kangke (SuperKraft) 96-inch Rearwin Speedster ARF. Keep in mind
that this column is being written in late February or early March.
A phrase from the movie The Outlaw Josey Wales comes to
mind: “Endeavor to persevere.” So, I will hang in there and hope for
more favorable conditions in the coming month.
The Rearwin builds quickly and easily. Because the model is
light for its size, it could be flown with a 35cc gas engine or
equivalent. I decided to power this model with a Zenoah G-45 gas
engine to provide extra power for those demanding maneuvers.
Stay tuned for upcoming flight-testing results. For more
information on the Rearwin, please visit the Kangke Web site at
Sal Calvagna, 1335 Broadway Ave., Holbrook NY 11741; E-mail: [email protected]
RADIO CONTROL GIANTS
The ElectroDynamics EDR-111 Pow’r Bus Pro chart shows that
separate battery sources power the servos and receiver.
The Ultra Switch from ElectroDynamics is a heavy-duty switch
harness designed for larger models.
Harold Harrison built this 90-inch-wingspan Laird Turner LTR-14
Meteor shown by his granddaughter Jenny.
Vernon Coop’s 1⁄4-scale, 120-inch-wingspan Grumman F2F-6
Duck is powered by a 3W-150 twin-cylinder gas engine.
www.kangkeusa.com or call Kangke at (877) 203-2377.
Warbirds Over Delaware 2004: The 13th annual Warbirds Over
Delaware event will take place July 8-11, 2004. The Delaware R/C
club knows how to host an event. They have been doing a
magnificent job for the past 13 years.
Approximately 150 pilots and more than 200 International
Miniature Aircraft Association-legal military aircraft typically
attend this popular East Coast event. The models range from
World War I aircraft through the jet age. There are great people,
07sig4.QXD 4/23/04 12:39 pm Page 106
fantastic airplanes, and it’s a lot of fun!
If you’re interested in attending this year’s event, please visit the
Delaware R/C Club Web site for all of the pertinent information:
www.delawarerc.org/warbirds.htm. See you there!
EDR-111 Pow’R Bus Pro: As our models grow in size and
complexity, one of the issues that RC Giant modelers are concerned
about is providing ample current to power the receiver and servos.
Actually, the receiver alone has only a small current draw; it is the
servos that are greedy for battery power.
Some of today’s modern digital servos can provide more than 200
ounces of torque and they are the same physical size as a standard
servo. However, these new servos draw approximately 30% more
current than their nondigital brethren.
When installing a larger number of these digital servos in a 30-
50% model (some using two or more servos on a single movable
surface), you can run into a situation where the battery’s voltage
level can drop momentarily when under extreme current load causing
unpredictable receiver operation. In some cases a Pulse Code
Modulation (PCM) receiver can go into a fail-safe mode because of a
momentary dip in voltage caused by an elevated current draw by the
servos.
The EDR-111 Pow’R Bus Pro reduces or eliminates this
interference by optically isolating the receiver power from the flightcontrol
(servo) power. When using this system, separate battery
sources are used to power the receiver and servos. Even in the largest
models, a relatively small 600-800 mAh battery source can be used
to power the receiver while a much larger Sub C- or C-cell battery
pack (1700-3000 mAh) would be used to power the servos.
The EDR-111 can isolate as many as six control channels. If more
channels are needed, an EDR-111X expansion cable and a second
EDR-111 unit may be installed.
In addition to the Pow’R Bus Pro, if you are building and flying
larger models, you should consider using a heavy-duty switch
harness. The larger current draws and increased vibration in Giant
July 2004 107
Master builder Hank Iltzsch constructed this 88-inch-wingspan,
22.5-pound de Havilland Tiger Moth from a balsa kit.
Scale applications make using a heavy-duty switch a smart move.
The Ultra Switch incorporates a charge jack, a charge jack sliding
cover, a switch guard to prevent accidental operation, and a molded
rear nut plate that retains the mounting screws (no fumbling to install
miniature nuts).
Both products from ElectroDynamics are designed to make Giant
Scale operation safe and fun. For more information on these and
other great products, please contact ElectroDynamics at (734) 422-
5420 or write to the company at 31091 Schoolcraft, Livonia MI
48150. Online, you can visit the ElectroDynamics Web site at
www.electrodynam.com.
Laird Turner: Harold J. Harrison of Norristown, Pennsylvania,
.us
07sig4.QXD 4/23/04 12:39 pm Page 107
sent a photo of his 90-inch-wingspan,
scratch-built Laird Turner LTR-14.
Piloted by Golden Age racer Roscoe
Turner, the airplane won the 1938
Thompson Trophy race with an average
speed of 238.4 mph.
The model was designed using Paul
Matt three-view drawings and various
photos. It was constructed using balsa
and plywood. The fuselage was covered
in Sig Koverall, and the wings were
sheeted and fiberglassed. Sig dope
provided the finish.
Four layers of heavy fiberglass cloth
were used over a Styrofoam plug to make
the cowl. Harold also made the
canopy/windscreen. He wrote that it took
him seven attempts using a plug in the
oven before pulling a canopy that was
acceptable.
Designed and flown by Roscoe Turner
and modified by Matty Laird, the LTR-14
Meteor—later named Miss Champion—
won the Thompson Trophy in 1938 and
1939. This made Turner the only threetime
winner of the event since he had
previously won in 1934.
It looks as though Harold did a great
job designing and building this famous
racer. Best to you on your first flight!
Harold is a member of the Valley
Forge Signal Seekers club.
Vernon’s Giant: Vernon Coop of Joliet,
Illinois, builds them big. Shown is one of
108 MODEL AVIATION
Some changes are coming to
Superior Balsa & Hobby Supply.
We’re starting with
www.superiorbalsa.com
his latest projects: a 1⁄4-scale Grumman
F2F-6 Duck that he built from threeviews.
It spans 120 inches and has a
fuselage length of 120 inches.
The model is powered by a 3W-150
twin-cylinder gas engine and weighs 54
pounds. The wings are covered in 21st
Century cloth. The fuselage is covered in
fiberglass cloth and finished in MonoKote
spray paint.
Vernon uses a JR radio system and
dual JR receivers with 8411 servos for
control. He says that the Duck is a great
and easy airplane to fly.
Grumman’s first amphibian design
was offered to the US Navy on paper
only. The Navy agreed to fund the
prototype. As the first flying boat of the
newly founded Grumman Corporation,
the XJF-1 made its maiden flight on May
4, 1933. It had an initial production run of
27 aircraft, with the first delivery made in
late 1934.
The aircraft became known as the
Duck or ugly Duckling and was crewed
by a pilot, an observer, and an optional
radio operator. It served as a utility
transport onboard aircraft carriers and
provided a ship-to-shore link for the
Navy.
Production continued until 1941, with the
Coast Guard and Marine Corps also
deploying the aircraft. Afterward, another
330 J2F-6 models were built by the
Columbia Aircraft Corporation. At the end of
World War II, a total of 632 Ducks in
different variations were built.
Hank Loves the Early Giants: Hank Iltzsch
of Seekonk, Massachusetts, has been building
early-era RC Giants for more than 25 years.
You might say that he is one of the pioneers
of 1⁄4-scale modeling. Throughout the years
Hank has built more than 25 1⁄4- to 1⁄3-scale
models and is currently working on a 1⁄5-scale
de Havilland D.H.6.
Shown is one of his latest projects: an 88-
inch-span de Havilland Tiger Moth. The
model was built from an M&H balsa kit that
he purchased more than 15 years ago at the
WRAM (Westchester Radio Aero Modelers)
Show in New York.
The model weighs 22.5 pounds and is
powered by a Zenoah G-38 gas engine. It has
a wing area of 2,150 square inches that gives
it a nice 24.1-ounce-per-square-foot wing
loading.
All of Hank’s models are meticulously
built and finished. They have graced the
pages of many modeling magazines, and
Hank has authored feature construction
articles in R/C Model Builder. Keep up the
great work, Hank!
So ends another RC Giants column. If you
have a subject that you would like me to
write about, drop me a line and I’ll do my
best to accommodate your request.
In the interim, have a great modeling
month. MA
07sig4.QXD 4/23/04 12:40 pm Page 108
Edition: Model Aviation - 2004/07
Page Numbers: 106,107,108
Edition: Model Aviation - 2004/07
Page Numbers: 106,107,108
106 MODEL AVIATION
I AM FRUSTRATED by the long, cold, and miserable winter of
2004. The Northeast weather has again delayed the first flight of the
Kangke (SuperKraft) 96-inch Rearwin Speedster ARF. Keep in mind
that this column is being written in late February or early March.
A phrase from the movie The Outlaw Josey Wales comes to
mind: “Endeavor to persevere.” So, I will hang in there and hope for
more favorable conditions in the coming month.
The Rearwin builds quickly and easily. Because the model is
light for its size, it could be flown with a 35cc gas engine or
equivalent. I decided to power this model with a Zenoah G-45 gas
engine to provide extra power for those demanding maneuvers.
Stay tuned for upcoming flight-testing results. For more
information on the Rearwin, please visit the Kangke Web site at
Sal Calvagna, 1335 Broadway Ave., Holbrook NY 11741; E-mail: [email protected]
RADIO CONTROL GIANTS
The ElectroDynamics EDR-111 Pow’r Bus Pro chart shows that
separate battery sources power the servos and receiver.
The Ultra Switch from ElectroDynamics is a heavy-duty switch
harness designed for larger models.
Harold Harrison built this 90-inch-wingspan Laird Turner LTR-14
Meteor shown by his granddaughter Jenny.
Vernon Coop’s 1⁄4-scale, 120-inch-wingspan Grumman F2F-6
Duck is powered by a 3W-150 twin-cylinder gas engine.
www.kangkeusa.com or call Kangke at (877) 203-2377.
Warbirds Over Delaware 2004: The 13th annual Warbirds Over
Delaware event will take place July 8-11, 2004. The Delaware R/C
club knows how to host an event. They have been doing a
magnificent job for the past 13 years.
Approximately 150 pilots and more than 200 International
Miniature Aircraft Association-legal military aircraft typically
attend this popular East Coast event. The models range from
World War I aircraft through the jet age. There are great people,
07sig4.QXD 4/23/04 12:39 pm Page 106
fantastic airplanes, and it’s a lot of fun!
If you’re interested in attending this year’s event, please visit the
Delaware R/C Club Web site for all of the pertinent information:
www.delawarerc.org/warbirds.htm. See you there!
EDR-111 Pow’R Bus Pro: As our models grow in size and
complexity, one of the issues that RC Giant modelers are concerned
about is providing ample current to power the receiver and servos.
Actually, the receiver alone has only a small current draw; it is the
servos that are greedy for battery power.
Some of today’s modern digital servos can provide more than 200
ounces of torque and they are the same physical size as a standard
servo. However, these new servos draw approximately 30% more
current than their nondigital brethren.
When installing a larger number of these digital servos in a 30-
50% model (some using two or more servos on a single movable
surface), you can run into a situation where the battery’s voltage
level can drop momentarily when under extreme current load causing
unpredictable receiver operation. In some cases a Pulse Code
Modulation (PCM) receiver can go into a fail-safe mode because of a
momentary dip in voltage caused by an elevated current draw by the
servos.
The EDR-111 Pow’R Bus Pro reduces or eliminates this
interference by optically isolating the receiver power from the flightcontrol
(servo) power. When using this system, separate battery
sources are used to power the receiver and servos. Even in the largest
models, a relatively small 600-800 mAh battery source can be used
to power the receiver while a much larger Sub C- or C-cell battery
pack (1700-3000 mAh) would be used to power the servos.
The EDR-111 can isolate as many as six control channels. If more
channels are needed, an EDR-111X expansion cable and a second
EDR-111 unit may be installed.
In addition to the Pow’R Bus Pro, if you are building and flying
larger models, you should consider using a heavy-duty switch
harness. The larger current draws and increased vibration in Giant
July 2004 107
Master builder Hank Iltzsch constructed this 88-inch-wingspan,
22.5-pound de Havilland Tiger Moth from a balsa kit.
Scale applications make using a heavy-duty switch a smart move.
The Ultra Switch incorporates a charge jack, a charge jack sliding
cover, a switch guard to prevent accidental operation, and a molded
rear nut plate that retains the mounting screws (no fumbling to install
miniature nuts).
Both products from ElectroDynamics are designed to make Giant
Scale operation safe and fun. For more information on these and
other great products, please contact ElectroDynamics at (734) 422-
5420 or write to the company at 31091 Schoolcraft, Livonia MI
48150. Online, you can visit the ElectroDynamics Web site at
www.electrodynam.com.
Laird Turner: Harold J. Harrison of Norristown, Pennsylvania,
.us
07sig4.QXD 4/23/04 12:39 pm Page 107
sent a photo of his 90-inch-wingspan,
scratch-built Laird Turner LTR-14.
Piloted by Golden Age racer Roscoe
Turner, the airplane won the 1938
Thompson Trophy race with an average
speed of 238.4 mph.
The model was designed using Paul
Matt three-view drawings and various
photos. It was constructed using balsa
and plywood. The fuselage was covered
in Sig Koverall, and the wings were
sheeted and fiberglassed. Sig dope
provided the finish.
Four layers of heavy fiberglass cloth
were used over a Styrofoam plug to make
the cowl. Harold also made the
canopy/windscreen. He wrote that it took
him seven attempts using a plug in the
oven before pulling a canopy that was
acceptable.
Designed and flown by Roscoe Turner
and modified by Matty Laird, the LTR-14
Meteor—later named Miss Champion—
won the Thompson Trophy in 1938 and
1939. This made Turner the only threetime
winner of the event since he had
previously won in 1934.
It looks as though Harold did a great
job designing and building this famous
racer. Best to you on your first flight!
Harold is a member of the Valley
Forge Signal Seekers club.
Vernon’s Giant: Vernon Coop of Joliet,
Illinois, builds them big. Shown is one of
108 MODEL AVIATION
Some changes are coming to
Superior Balsa & Hobby Supply.
We’re starting with
www.superiorbalsa.com
his latest projects: a 1⁄4-scale Grumman
F2F-6 Duck that he built from threeviews.
It spans 120 inches and has a
fuselage length of 120 inches.
The model is powered by a 3W-150
twin-cylinder gas engine and weighs 54
pounds. The wings are covered in 21st
Century cloth. The fuselage is covered in
fiberglass cloth and finished in MonoKote
spray paint.
Vernon uses a JR radio system and
dual JR receivers with 8411 servos for
control. He says that the Duck is a great
and easy airplane to fly.
Grumman’s first amphibian design
was offered to the US Navy on paper
only. The Navy agreed to fund the
prototype. As the first flying boat of the
newly founded Grumman Corporation,
the XJF-1 made its maiden flight on May
4, 1933. It had an initial production run of
27 aircraft, with the first delivery made in
late 1934.
The aircraft became known as the
Duck or ugly Duckling and was crewed
by a pilot, an observer, and an optional
radio operator. It served as a utility
transport onboard aircraft carriers and
provided a ship-to-shore link for the
Navy.
Production continued until 1941, with the
Coast Guard and Marine Corps also
deploying the aircraft. Afterward, another
330 J2F-6 models were built by the
Columbia Aircraft Corporation. At the end of
World War II, a total of 632 Ducks in
different variations were built.
Hank Loves the Early Giants: Hank Iltzsch
of Seekonk, Massachusetts, has been building
early-era RC Giants for more than 25 years.
You might say that he is one of the pioneers
of 1⁄4-scale modeling. Throughout the years
Hank has built more than 25 1⁄4- to 1⁄3-scale
models and is currently working on a 1⁄5-scale
de Havilland D.H.6.
Shown is one of his latest projects: an 88-
inch-span de Havilland Tiger Moth. The
model was built from an M&H balsa kit that
he purchased more than 15 years ago at the
WRAM (Westchester Radio Aero Modelers)
Show in New York.
The model weighs 22.5 pounds and is
powered by a Zenoah G-38 gas engine. It has
a wing area of 2,150 square inches that gives
it a nice 24.1-ounce-per-square-foot wing
loading.
All of Hank’s models are meticulously
built and finished. They have graced the
pages of many modeling magazines, and
Hank has authored feature construction
articles in R/C Model Builder. Keep up the
great work, Hank!
So ends another RC Giants column. If you
have a subject that you would like me to
write about, drop me a line and I’ll do my
best to accommodate your request.
In the interim, have a great modeling
month. MA
07sig4.QXD 4/23/04 12:40 pm Page 108
Edition: Model Aviation - 2004/07
Page Numbers: 106,107,108
106 MODEL AVIATION
I AM FRUSTRATED by the long, cold, and miserable winter of
2004. The Northeast weather has again delayed the first flight of the
Kangke (SuperKraft) 96-inch Rearwin Speedster ARF. Keep in mind
that this column is being written in late February or early March.
A phrase from the movie The Outlaw Josey Wales comes to
mind: “Endeavor to persevere.” So, I will hang in there and hope for
more favorable conditions in the coming month.
The Rearwin builds quickly and easily. Because the model is
light for its size, it could be flown with a 35cc gas engine or
equivalent. I decided to power this model with a Zenoah G-45 gas
engine to provide extra power for those demanding maneuvers.
Stay tuned for upcoming flight-testing results. For more
information on the Rearwin, please visit the Kangke Web site at
Sal Calvagna, 1335 Broadway Ave., Holbrook NY 11741; E-mail: [email protected]
RADIO CONTROL GIANTS
The ElectroDynamics EDR-111 Pow’r Bus Pro chart shows that
separate battery sources power the servos and receiver.
The Ultra Switch from ElectroDynamics is a heavy-duty switch
harness designed for larger models.
Harold Harrison built this 90-inch-wingspan Laird Turner LTR-14
Meteor shown by his granddaughter Jenny.
Vernon Coop’s 1⁄4-scale, 120-inch-wingspan Grumman F2F-6
Duck is powered by a 3W-150 twin-cylinder gas engine.
www.kangkeusa.com or call Kangke at (877) 203-2377.
Warbirds Over Delaware 2004: The 13th annual Warbirds Over
Delaware event will take place July 8-11, 2004. The Delaware R/C
club knows how to host an event. They have been doing a
magnificent job for the past 13 years.
Approximately 150 pilots and more than 200 International
Miniature Aircraft Association-legal military aircraft typically
attend this popular East Coast event. The models range from
World War I aircraft through the jet age. There are great people,
07sig4.QXD 4/23/04 12:39 pm Page 106
fantastic airplanes, and it’s a lot of fun!
If you’re interested in attending this year’s event, please visit the
Delaware R/C Club Web site for all of the pertinent information:
www.delawarerc.org/warbirds.htm. See you there!
EDR-111 Pow’R Bus Pro: As our models grow in size and
complexity, one of the issues that RC Giant modelers are concerned
about is providing ample current to power the receiver and servos.
Actually, the receiver alone has only a small current draw; it is the
servos that are greedy for battery power.
Some of today’s modern digital servos can provide more than 200
ounces of torque and they are the same physical size as a standard
servo. However, these new servos draw approximately 30% more
current than their nondigital brethren.
When installing a larger number of these digital servos in a 30-
50% model (some using two or more servos on a single movable
surface), you can run into a situation where the battery’s voltage
level can drop momentarily when under extreme current load causing
unpredictable receiver operation. In some cases a Pulse Code
Modulation (PCM) receiver can go into a fail-safe mode because of a
momentary dip in voltage caused by an elevated current draw by the
servos.
The EDR-111 Pow’R Bus Pro reduces or eliminates this
interference by optically isolating the receiver power from the flightcontrol
(servo) power. When using this system, separate battery
sources are used to power the receiver and servos. Even in the largest
models, a relatively small 600-800 mAh battery source can be used
to power the receiver while a much larger Sub C- or C-cell battery
pack (1700-3000 mAh) would be used to power the servos.
The EDR-111 can isolate as many as six control channels. If more
channels are needed, an EDR-111X expansion cable and a second
EDR-111 unit may be installed.
In addition to the Pow’R Bus Pro, if you are building and flying
larger models, you should consider using a heavy-duty switch
harness. The larger current draws and increased vibration in Giant
July 2004 107
Master builder Hank Iltzsch constructed this 88-inch-wingspan,
22.5-pound de Havilland Tiger Moth from a balsa kit.
Scale applications make using a heavy-duty switch a smart move.
The Ultra Switch incorporates a charge jack, a charge jack sliding
cover, a switch guard to prevent accidental operation, and a molded
rear nut plate that retains the mounting screws (no fumbling to install
miniature nuts).
Both products from ElectroDynamics are designed to make Giant
Scale operation safe and fun. For more information on these and
other great products, please contact ElectroDynamics at (734) 422-
5420 or write to the company at 31091 Schoolcraft, Livonia MI
48150. Online, you can visit the ElectroDynamics Web site at
www.electrodynam.com.
Laird Turner: Harold J. Harrison of Norristown, Pennsylvania,
.us
07sig4.QXD 4/23/04 12:39 pm Page 107
sent a photo of his 90-inch-wingspan,
scratch-built Laird Turner LTR-14.
Piloted by Golden Age racer Roscoe
Turner, the airplane won the 1938
Thompson Trophy race with an average
speed of 238.4 mph.
The model was designed using Paul
Matt three-view drawings and various
photos. It was constructed using balsa
and plywood. The fuselage was covered
in Sig Koverall, and the wings were
sheeted and fiberglassed. Sig dope
provided the finish.
Four layers of heavy fiberglass cloth
were used over a Styrofoam plug to make
the cowl. Harold also made the
canopy/windscreen. He wrote that it took
him seven attempts using a plug in the
oven before pulling a canopy that was
acceptable.
Designed and flown by Roscoe Turner
and modified by Matty Laird, the LTR-14
Meteor—later named Miss Champion—
won the Thompson Trophy in 1938 and
1939. This made Turner the only threetime
winner of the event since he had
previously won in 1934.
It looks as though Harold did a great
job designing and building this famous
racer. Best to you on your first flight!
Harold is a member of the Valley
Forge Signal Seekers club.
Vernon’s Giant: Vernon Coop of Joliet,
Illinois, builds them big. Shown is one of
108 MODEL AVIATION
Some changes are coming to
Superior Balsa & Hobby Supply.
We’re starting with
www.superiorbalsa.com
his latest projects: a 1⁄4-scale Grumman
F2F-6 Duck that he built from threeviews.
It spans 120 inches and has a
fuselage length of 120 inches.
The model is powered by a 3W-150
twin-cylinder gas engine and weighs 54
pounds. The wings are covered in 21st
Century cloth. The fuselage is covered in
fiberglass cloth and finished in MonoKote
spray paint.
Vernon uses a JR radio system and
dual JR receivers with 8411 servos for
control. He says that the Duck is a great
and easy airplane to fly.
Grumman’s first amphibian design
was offered to the US Navy on paper
only. The Navy agreed to fund the
prototype. As the first flying boat of the
newly founded Grumman Corporation,
the XJF-1 made its maiden flight on May
4, 1933. It had an initial production run of
27 aircraft, with the first delivery made in
late 1934.
The aircraft became known as the
Duck or ugly Duckling and was crewed
by a pilot, an observer, and an optional
radio operator. It served as a utility
transport onboard aircraft carriers and
provided a ship-to-shore link for the
Navy.
Production continued until 1941, with the
Coast Guard and Marine Corps also
deploying the aircraft. Afterward, another
330 J2F-6 models were built by the
Columbia Aircraft Corporation. At the end of
World War II, a total of 632 Ducks in
different variations were built.
Hank Loves the Early Giants: Hank Iltzsch
of Seekonk, Massachusetts, has been building
early-era RC Giants for more than 25 years.
You might say that he is one of the pioneers
of 1⁄4-scale modeling. Throughout the years
Hank has built more than 25 1⁄4- to 1⁄3-scale
models and is currently working on a 1⁄5-scale
de Havilland D.H.6.
Shown is one of his latest projects: an 88-
inch-span de Havilland Tiger Moth. The
model was built from an M&H balsa kit that
he purchased more than 15 years ago at the
WRAM (Westchester Radio Aero Modelers)
Show in New York.
The model weighs 22.5 pounds and is
powered by a Zenoah G-38 gas engine. It has
a wing area of 2,150 square inches that gives
it a nice 24.1-ounce-per-square-foot wing
loading.
All of Hank’s models are meticulously
built and finished. They have graced the
pages of many modeling magazines, and
Hank has authored feature construction
articles in R/C Model Builder. Keep up the
great work, Hank!
So ends another RC Giants column. If you
have a subject that you would like me to
write about, drop me a line and I’ll do my
best to accommodate your request.
In the interim, have a great modeling
month. MA
07sig4.QXD 4/23/04 12:40 pm Page 108