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Contents Listing - Articles & Features in this issue
727 Astrojet. Control line stunt model, for .8 cc engines. Pusher layout. Wingspan 28 in. Direct submission to Outerzone.Quote: "Hi, you might be able to use this so here goes. I found this plan in Aeromodeller Annual 1971-72 and decided to draw it up full size. Featured in Model Airplane News May 1969. Designed by Paul H Schaff Jr. Scaled and drawn here by Eric Stephen (me). A few years ago Ronnie Tribe of control line scale fame scaled my plan up again and put an OS 25 LA in the nose. See
Not to belabor this point, I made the following changes to the prototype and from then on, all worked well: 1. I increased wing area and made a Clark Y airfoil for more lift. 2. I lengthened the landing gear so I could give up without the prop hitting the ground. 3. I adjusted the balance by adding weights to the front so the plane just balanced on its 3 wheels with full gas tank. If tail was tapped lightly, plane would pivot back until the engine rested on the ground with nose in air. This appeared to be the best trim point for good flight, also for the final model. One other point - a profile design would leave a lot to be desired, appearance wise and I felt a full scale body was too much work. I compromised on a semi-full size fuselage, which I believe worked out fairly well. Now to the construction. Fuselage: From the plans, you will see that the fuselage is made of 1/2 in sheet for the side panels connected at top & bottom by balsa blocks 1/2 x 1 in that are contoured round, then hollowed out to 1/8 wall. The forward part of the fuselage has a 1 in wide by 6 in long solid balsa block between the 1/2 in side panels. This not only gives us weight in the front to counteract part of the engine weight in the rear but also supplies a good support for the front landing gear and a solid foundation for adding the extra weight required to balance the plane..."
Not to belabor this point, I made the following changes to the prototype and from then on, all worked well: 1. I increased wing area and made a Clark Y airfoil for more lift. 2. I lengthened the landing gear so I could give up without the prop hitting the ground. 3. I adjusted the balance by adding weights to the front so the plane just balanced on its 3 wheels with full gas tank. If tail was tapped lightly, plane would pivot back until the engine rested on the ground with nose in air. This appeared to be the best trim point for good flight, also for the final model. One other point - a profile design would leave a lot to be desired, appearance wise and I felt a full scale body was too much work. I compromised on a semi-full size fuselage, which I believe worked out fairly well. Now to the construction. Fuselage: From the plans, you will see that the fuselage is made of 1/2 in sheet for the side panels connected at top & bottom by balsa blocks 1/2 x 1 in that are contoured round, then hollowed out to 1/8 wall. The forward part of the fuselage has a 1 in wide by 6 in long solid balsa block between the 1/2 in side panels. This not only gives us weight in the front to counteract part of the engine weight in the rear but also supplies a good support for the front landing gear and a solid foundation for adding the extra weight required to balance the plane..."
| 727 Astrojet | |
| OUTERZONE REF. | 13241 |
| MODEL TYPE | SCALE C/L |
| DESIGNER | Paul H Schaff |
| POWER TYPE | Internal Combustion |
| CONTROL | Control Line |
| WINGSPAN | 711mm (28") |
| SOURCE | Aeromodeller Annual (1971) |
| SHIPPING WEIGHT (Printed) | 0.25kg |
Article Snippets
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The Outerzone reference number is provided to help distinguish this plan from others that may be similar - either other versions of the same plan or plans for different models of the same aircraft.
The Outerzone reference number is provided to help distinguish this plan from others that may be similar - either other versions of the same plan or plans for different models of the same aircraft.
