Light Plane Philosopher
- Dec 16, 2007
- Port Townsend WA
Same general configuration as the Ogar, and not far off the Strojnik S-2 (which was mid-wing, but otherwise the same). From the stand point of light, relatively simple construction, yep, it's pretty hard to beat this sort of arrangement. Engine mounting is easy, there's space for fuel (and your lunch or your jacket) below the engine and behind the seat, and it lends itself to super-simple semi-submerged monowheel main landing gear.I always thought this was the best single seat motorglider configuration.
Todhunter Blue Wren seen here: https://nzcivair.blogspot.com/2013/11/homebuilt-gliders-of-new-zealand.html
A dirt-simple little "fun" motorglider for local self-launch soaring, yes? This sort of thing ought to be really good for that, then.All true. But I am not so concerned about performance, since the launch is almost free. My experience is the better glider type view in front, the skid bottom for field landings and the unique look is important to me.
Sorry, nothing "pusher specific," no. The one you link covers a lot of the basics, albeit from the perspective of the twin-boom AG-14. Orion used to have some interesting "overview" material on his website, but that's long since been taken down. One thing that I don't think the AG-14 link you provided covers - or I missed in scanning it quickly - is that pushers tend to be a little longer and heavier overall than an otherwise equivalent conventional tractor design. The latter benefits from having the very compact and heavy engine stuffed right out in the extreme nose, whereas the CG of the pilot rests at his hips, and there has to be a long-ish nose forward of that to accommodate his legs, and the engine is behind him. To get the same tail moment arm, the pusher ends up being a little longer and therefore heavier. Not necessarily a problem unless you're really cramped for storage and/or trailering space, but something of which to be aware going in. I'd say the "penalty" for the kind of airplane of which we're speaking would be in the 24-36" range, overall.Any pusher design references? All I find online is this: http://www.angelfire.com/ks2/janowski/other_aircraft/AG14/AER.html
Sort of like the Cumulus, only enclosed?I plan to go low wing, instead of the Strojnic/Todhunter configuration. More like the Taylor Coot with low wing and swooped up tail boom. Coot seems to perform well: https://en.m.wikipedia.org/wiki/Taylor_Coot#/media/File:Coot_Amphibian.JPG
For a short-range self-launching motorglider, yes, I agree with you. For a "touring" motorglider, however, that's expected to have not only range but under-power cruising speed, the wing from a vintage sailplane is going to be set up for much lower speeds, and wouldn't work as well in that case.I have mentioned this before, but with all the vintage sailplanes for sale in the 3K to 5K range it would make sense to just design a motor glider fuselage and reuse the wings and empenage. Or at the very least the wings.
Ka6 still has decent high speed in relation to the Ka8For a short-range self-launching motorglider, yes, I agree with you. For a "touring" motorglider, however, that's expected to have not only range but under-power cruising speed, the wing from a vintage sailplane is going to be set up for much lower speeds, and wouldn't work as well in that case.
Engine mass is only say 50 pounds for a small two stroke, or 130 for a severely lightened VW. I don't see a problem bolting down such a small mass. A 220 pound guy in the back seat of a Cub is way (weigh?) more.I like the looks of the Janowski and Cumulus. However, I'm a bit nervous about all the mass behind my head. In a crash, I'd rather have that stuff in front of me. Also, all the disrupted flow to the prop and cooling I find problematic. So, I tend to favor the engines up front as being simpler.
I also like the Windex 1200C. If I remember right the tooling was for sale a few years back. Should have pounced on it. Might have been a good electric conversion.
I can't just pick one. I like the following for various reasons Pipistrel Sinus, Pipistrel eTaurus, the Pheonix, Elekta-One, Goshawk, Xenos, ASK-14, GP SE 14 Velo (I don't like turtle-deck deployment, but I think this is a great way to do it), and the Alisport Silent 2 Electro.
I wish that the J6 were available. I like the concept, and would love to learn more about it, and potentially own one with a reliable engine.