Kopter Rotor Recovery Rockets Pterosaur
Kopter Rotor Recovery Rockets - Pterosaur {Kit} (RK15) [1976-1980, 2015-]
Contributed by Robert A. Morstadt
| Flight Rating: | starstarstarstarstar |
| Overall Rating: | starstarstarstarstar_border |
| Published: | 2015-11-18 |
| Manufacturer: | Kopter Rotor Recovery Rockets |
| Style: | Glider |
Brief
The Pterosaur is a unique rocket glider invented by Walter Senoski of Kopter Rockets back in the 1970's. It uses a piston activated by the motor ejection charge to release the elevons to the up-position for gliding. An article describing this model appeared in the March/April 2015 issue of Sport Rocketry. At this time you will need to order the kit directly from Walter.
Components
The kit comes with all the parts (I was missing one balsa coupler that I ordered from Balsa Machine Services.) and detailed instructions. The model consists basically of two main tubes, one for the Estes D12-3 motor and the other for the piston. There is a large tail and wing and a nose cone for each tube. There are several pages of detailed instructions along with many illustrations showing how the model goes together.
Construction
The parts go together well with tips for construction. The wings are glued together in parts and pinned in place while the glue dries. I used white glue and Carpenter's glue for construction. A small narrow slot between the main tubes vents the ejection charge to the piston. The piston and piston stop are well made and fit together well. Special tabs hold the elevons in place during launch and a rubber band snaps the elevons into place for the glide.
Finishing
I did only very light sanding and light painting. Since this model is a glider, I wanted to keep the weight low.
Flight
The model flies well on the recommended D12-3 motors. The model is extremely easy to prep for flight.
Recovery
I had two good flights in one day with no damage. The altitude is fairly high so the glides are long. The first launch was straight up. The second launch wind cocked but then gained altitude.
Summary
This is a model is very rewarding and fun. The construction takes some effort, but it is worth it.
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Flights
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