November 2004 139
AS I WRITE this, the 2004 Control Line
World Championships is history, as is the
CL Navy Carrier demonstration that the
Navy Carrier Society hosted during the
event. The competition consisted of AMA
Profile Carrier and Class I Carrier, with a
10% fuel requirement. The latter was held
to encourage CL modelers from other
countries who were attending the World
Championships to try the event.
There were many spectators, with
many questions about the events and how
they are flown, although only US
modelers flew in the competition. Ted
CONTROL LINE NAVY CARRIER
Dick Perry, 427 Live Oak Ln. NE, Albuquerque NM 87122; E-mail: [email protected]
Glenn Simpson flew this Rossi .60-powered Sturdi-Built Mauler at the 2002 Nats.
Bill Bischoff’s lightweight, low-drag, and effective line-slider design uses a carbon-fiber
composite arrow shaft as the main structural member.
A plywood slider is attached to the tube that fits inside the arrow shaft.
Kraver was busy with his camera, and I
anticipate more information will be
included in other articles. I’m sorry to
have had to miss the festivities in Muncie,
Indiana, this summer.
The Profile Martin Mauler that Bob
Smurthwaite designed and I wrote about in
the August column generated a pleasant
surprise for me. I received a letter from
Clair Sieverling that was accompanied by
a copy of the April 1964 Model Airplane
News article that he wrote.
Clair started flying Navy Carrier with
the Sturdi-Built Mauler powered by a .35
engine, and then he upped the ante for
Carrier in Arizona by moving to a McCoy
.60 engine with a Johnson carburetor.
Carrier was still flown as a single class
with no engine-size limits when Bill
Netzeband had his little 30-inch-span,
125-square-inch Guardian design
published. That article inspired Clair to
build a smaller Navy Carrier model, and
he used the Mauler as the prototype. His
design was the subject of the Model
Airplane News article that he sent me.
That Mauler was the first Navy Carrier
model that I built, in 1967, and I powered
it with a SuperTigre G-21 .40 engine. I
learned a great deal with that model, and I
put the lessons to use in my Seamew
design in 1972 and my Class II
(aluminum-wing) Martin MO-1 in 1973.
I’d lost my original Mauler plans in
one of my many moves. Last winter Leroy
Cordes sent me another copy of the
original Sieverling Mauler plans that he
found when he was cleaning out his files,
so the memories were flooding back.
Thanks, Clair and Leroy, for the nostalgia
trip.
I don’t have a photo of my Mauler
from 37 years ago, but I’ve included a shot
of Glenn Simpson’s Sturdi-Built Mauler
from the 2002 Nats.
The other photos I’m featuring this
month reveal all the secrets of Bill
Bischoff’s effective, lightweight, low-drag
line-slider design. Thanks to Bill for
sharing the information following an
unfortunate crash.
The photographs tell most of the story.
The line guide is plywood, and it has an
aluminum tube attached to the top. The
tube is a loose fit inside a carbon-fiber
arrow shaft that forms the track for the
slider. The arrows are available singly at
archery shops, or you can purchase the
shafts without all of the arrow
paraphernalia at a kite shop if you happen
to have one in your area.
A slot is cut in one side of the shaft,
and then the shaft is glued into a thick rib
in the wing structure. The release consists
of a wire pin inserted through the metal
tube in the rib, through the side of the
arrow shaft, and into a hole drilled in the
metal tube of the slider.
The pin can be pulled with a line
attached to the throttle or elevator leadout,
a wire attached to the bellcrank, or a wire
actuated by the tailhook.
After the initial fit and finish is
accomplished on the internal components
and the release mechanism, the slider can
be removed for finishing the model. When
the airplane is finished, the slider can be
inserted from the rear of the arrow shaft,
and the rear stop can be glued into the
shaft at the appropriate place. A smalldiameter
wire bound and glued to the
outside of the shaft forms a catch to keep
the slider at the rearmost position for lowspeed
flight. MA
Edition: Model Aviation - 2004/11
Page Numbers: 139,140
Edition: Model Aviation - 2004/11
Page Numbers: 139,140
November 2004 139
AS I WRITE this, the 2004 Control Line
World Championships is history, as is the
CL Navy Carrier demonstration that the
Navy Carrier Society hosted during the
event. The competition consisted of AMA
Profile Carrier and Class I Carrier, with a
10% fuel requirement. The latter was held
to encourage CL modelers from other
countries who were attending the World
Championships to try the event.
There were many spectators, with
many questions about the events and how
they are flown, although only US
modelers flew in the competition. Ted
CONTROL LINE NAVY CARRIER
Dick Perry, 427 Live Oak Ln. NE, Albuquerque NM 87122; E-mail: [email protected]
Glenn Simpson flew this Rossi .60-powered Sturdi-Built Mauler at the 2002 Nats.
Bill Bischoff’s lightweight, low-drag, and effective line-slider design uses a carbon-fiber
composite arrow shaft as the main structural member.
A plywood slider is attached to the tube that fits inside the arrow shaft.
Kraver was busy with his camera, and I
anticipate more information will be
included in other articles. I’m sorry to
have had to miss the festivities in Muncie,
Indiana, this summer.
The Profile Martin Mauler that Bob
Smurthwaite designed and I wrote about in
the August column generated a pleasant
surprise for me. I received a letter from
Clair Sieverling that was accompanied by
a copy of the April 1964 Model Airplane
News article that he wrote.
Clair started flying Navy Carrier with
the Sturdi-Built Mauler powered by a .35
engine, and then he upped the ante for
Carrier in Arizona by moving to a McCoy
.60 engine with a Johnson carburetor.
Carrier was still flown as a single class
with no engine-size limits when Bill
Netzeband had his little 30-inch-span,
125-square-inch Guardian design
published. That article inspired Clair to
build a smaller Navy Carrier model, and
he used the Mauler as the prototype. His
design was the subject of the Model
Airplane News article that he sent me.
That Mauler was the first Navy Carrier
model that I built, in 1967, and I powered
it with a SuperTigre G-21 .40 engine. I
learned a great deal with that model, and I
put the lessons to use in my Seamew
design in 1972 and my Class II
(aluminum-wing) Martin MO-1 in 1973.
I’d lost my original Mauler plans in
one of my many moves. Last winter Leroy
Cordes sent me another copy of the
original Sieverling Mauler plans that he
found when he was cleaning out his files,
so the memories were flooding back.
Thanks, Clair and Leroy, for the nostalgia
trip.
I don’t have a photo of my Mauler
from 37 years ago, but I’ve included a shot
of Glenn Simpson’s Sturdi-Built Mauler
from the 2002 Nats.
The other photos I’m featuring this
month reveal all the secrets of Bill
Bischoff’s effective, lightweight, low-drag
line-slider design. Thanks to Bill for
sharing the information following an
unfortunate crash.
The photographs tell most of the story.
The line guide is plywood, and it has an
aluminum tube attached to the top. The
tube is a loose fit inside a carbon-fiber
arrow shaft that forms the track for the
slider. The arrows are available singly at
archery shops, or you can purchase the
shafts without all of the arrow
paraphernalia at a kite shop if you happen
to have one in your area.
A slot is cut in one side of the shaft,
and then the shaft is glued into a thick rib
in the wing structure. The release consists
of a wire pin inserted through the metal
tube in the rib, through the side of the
arrow shaft, and into a hole drilled in the
metal tube of the slider.
The pin can be pulled with a line
attached to the throttle or elevator leadout,
a wire attached to the bellcrank, or a wire
actuated by the tailhook.
After the initial fit and finish is
accomplished on the internal components
and the release mechanism, the slider can
be removed for finishing the model. When
the airplane is finished, the slider can be
inserted from the rear of the arrow shaft,
and the rear stop can be glued into the
shaft at the appropriate place. A smalldiameter
wire bound and glued to the
outside of the shaft forms a catch to keep
the slider at the rearmost position for lowspeed
flight. MA