Posted by Michael V |
Sep 18, 2013 @ 07:08 PM | 2,028 Views
Some time ago I started a new project, ambitious but that's how I like them.
I wanted to design a slope "jet". Before I tackled my favorite jets (F16, F14, F18E, some are already in progress, design stage) I stumbled upon the SU37 thread as a parkjet so it inspired me to design a SU 27 (no canards yet, that may become a later project, baby steps see)
So here I went and designed from scratch.
I used MPF (Model Plane Foam) as it is the best medium out there in my opinion.
The basic design objectives were:
1 - Light plane
2 - Enough lift so that it would fly correctly
3 - Simplified overall shape, yet good enough to look good and "scale"
4 - Smart enough aero design in the hope that it would perform some "post stall" maneuvers although I knew that was borderline impossible considering the format (light, lack of engines, has to be stable (CG forward of AC))
4- Test bed for some ideas in design (direct drive control surfaces)
and hopefully it would fly well and be fun to fly too.
So a list of design choices were made (to be tested):
- Foam, painted in acrylic and covered with laminating film
- Some LE reinforcement, 3/16 wood round
- Direct drive tailerons, no other surfaces for the time being
- Airbrake, for fun, and also as a access hatch for the electronic, more on that later
- Subsonic wings, based on KFm2 airfoil for gentle stall characteristics and ease of building. No flat plank here, this thing needs to soar.
- Lifting "engine...Continue Reading