Now that you've bought our 1:4 scale Hall Cherokee or 1-23 you need your own tow plane... and the Piper Pawnee is just about the most perfect towplane around. Wherever you live in the world, it is likely that you have had the opportunity to watch a crop duster at work. These little aircraft and the larger than life pilots that fly them are the working heroes of ag-aviation.
Controlling pests and putting in hours of time flying high-risk circuits low and fast above the crops, they are out there dodging trees, fences and power lines &emdash; risking their lives to get the job done. It seems they make the perfect towplane too, since they now make their living towing $3000 to $100,000 sailplanes into the wild blue for hire. Every glider port worth its salt employs several, and on weekends spring through fall, you can see and hear them roaring off the end of the runway with glider in tow.
There is little doubt that this is going to be the best-flying, most durable, show-stopping towplane or duster - and its competition-winning scale if you want to build in the details.
We could think of no better aircraft to model as our first scale towplane than the Piper PA-25 Pawnee. Not only is it the perfect scale tug, but with Dick Graham's plans and our parts kit for the optional hopper kit, you can put it to good use dusting the back 40 or dropping tootsie rolls and your next club event!
We've followed Dick's 1980 National Scale winning design in every way with the exception of just a few items which take advantage of laser cutting and computer aided drafting to simplify your build and strengthen a few key elements in the forward fuselage.
Tails and wings use laser cut curved outer edges with notches to make jigging ribs exactly into place a snap and cutting assembly time to a minimum while increasing the bond areas of these critical joints and eliminating or reducing the need for gussets.
Span: 108" (2.7m),
Length: 65.5" (80cm)
Area: 1700 in.2
All up weight: 18-22 lbs.
Airfoil: Clark Y
Scale: 1:4
No. Servos Req'd: 7-9
KIT CONTENTS
Plan Sheets, Rolled, (sheets 1 of 2 and 2 of 2)
Laser Cut Parts Kit
Canopy Material .030 plastic, 12” x 18” (2)
Hardware Kit
3/16” dia. 3-piece Landing Gear wire set, TMRC PA-25MG
4 1/2" Main Wheels (2) DUB450TL
3/16” Wheel Collars, DUB141
Quarter scale leaf spring tailwheel kit SIGSH729
2" Tail Wheel, DUB200TL
3" White Spinner, SIGSP301
Robart Pin Hinges, (3) ROB308
Robart Ball Link Control Horns, (3) ROB331
Elevator Control horn, SIGSH554
4-40 Pull/Pull Rudder Kit, DUB518
4-40 Control Rod for all surfaces, (3) DUB379
4-40 Ball Links servo connections, (3) DUB902
.064” x 1/2” x 12” Brass Strip, K&S246
5/32” x 12” Aluminum Tubing, (3) K&S103
.032” x 4” x 12” Aluminum Sheet, K&S256
.016” Aluminum Main Gear, (4 sheets ) K&S255 (to fab landing gear "pants")
1/16” x 2” x 12” Tempered Aluminum, SIGGB006
6-32 Cap Screws, DUB179
Antenna Tube, DUB511
Golden Rod Throttle linkage, SUL503
Flying Wire Kit, SULS546
Front wing strut fairings, left and right
Rear wing strut fairings, left and right
Wing Struts 5/16” x 1” x 30” streamlined basswood (4) TMRC
Wing Jury Strut 1/4” x 1/2” x 30” streamlined basswood TMRC
2 qty 3/16" x 1-1/4" x 48" spruce spars
5 qty 1/4" x 1/4" x 48" spruce "D" section spars
Hi.
How much Span 60 in.
From
Madrid
Spain
Posted by: Fernando Pérez | January 25, 2010 at 06:21 AM