Bob Taylor's 1/3 Scale Sopwith Pup

A kit by Balsa USA
Photos and text by Doug Mills


Photo-courtesy of Balsa USA

Note: this kit is NOT suitable for beginners.

Specifications:

Wingspan:  108", Fuse length:  77",  Wing cord:  21",  Wing style:  Undercambered,  Wing area : 4,428 sq. in. (that's over 30 square feet!)  Wing loading:  approx. 16.7 oz/sq.ft.,  Estimated weight:  32 lbs,  Functions:  Rudder, elevator,  ailerons, throttle.  Basic construction: 1/8 in. ply, balsa, light ply, and fabric covering, Brushed aluminum cowl,  Finish: dope and custom mixed flat exterior latex, stained cabane and wing struts,  Servos: 5 ball bearing (throttle, dual aileron, pull-pull rudder and elevator),  Functional flying and landing wires,  Engine:  G62,  Gear: Custom built shock absorbing, fixed main, steerable tail wheel,  Wheels: 9" wire spoked mains and 2"  tail,  Fuel tank: 50 oz.  gas,  Prop: one 22X8,  Radio: JR PCM.  Dummy radial engine and machine gun are kits by Mick Reeves Models-UK

The first  group of  photos (taken early in late October, 2003) show the result of about three months planning, and building.

group one front.jpg (139938 bytes) group one left front.jpg (74091 bytes) group one right.jpg (121413 bytes)  

group one left rear.jpg (131717 bytes) group one struts.jpg (196357 bytes) group one struts rear.jpg (78931 bytes)

The next group of photos was taken in late December 2003. The plane is about 90% complete. 

group  two cockpit.jpg (798457 bytes) group two dummy.jpg (272044 bytes) group two engine mounted.jpg (366274 bytes) group two fron wing.jpg (148008 bytes)

group two left front.jpg (683386 bytes) group two right side.jpg (342957 bytes) group two wing holder.jpg (1551205 bytes) group two wings.jpg (1442380 bytes)

screen printed roundels.jpg (107146 bytes)

The next group of photos were taken in February, 2004.  Working on the details!

Img_0083.jpg (200855 bytes) Img_0088-2.jpg (203214 bytes) Img_0089-2.jpg (171749 bytes)

"The morning of June 30, 2004 and all systems are "go" for the Pup's maiden flight. Henry Bergen piloted the plane. Once off the ground, the plane went into a nose-up attitude. Even with full down trim and holding lots of down stick, Henry managed to bring the plane around the patch for a safe landing.  There was some discussion about the wing incidence being off slightly may be the problem. Henry did some adjusting of the flying wires on the stabilizer and made a second attempt. This seemed to help somewhat, but still a handful for Henry. He made a couple of passes and landed. And what a landing! The Pup just floated in! There was more discussion about the plane being tail heavy. This will be addressed later, and hopefully we'll see the plane fly again."

puprightside-1.JPG (229690 bytes) pupleftside-1.JPG (231587 bytes) landing2-1.JPG (81877 bytes) landing1-1.JPG (138009 bytes)

 

 

This page was last updated on 04/22/10 .
send email to the Webmaster

Copyright April, 2010 Frederick Model Aircraft Club, Inc.