Wing Loading for "Delta" Configuration?

[JonB]

Hi Guys:
Thinking of building a semi-scale delta of the "Rohr" delta from the 1960's designed (at least partially) by Walt Mooney (noted modeler - now deceased).
My intentions are for an indoor/outdoor electric R/C version, so (balsa) structure will be quite light, however I'm trying to figure out what the wing loading should be using the slightly reflexed and slightly undercambered airfoil apparently from the scale aircraft. Current drawn wing area is about 115 sq. in. with about 16. in span. Please note: I don't want this thing to be a "Dart", I want to be able fly in indoors and gym walls come up pretty fast -no matter what!
Sincerely,
Jon B. Shereshaw

[Tom Harper]

At that size, about 3oz per sq ft. and 50 W power to the prop.

Any relation to Benny Shereshaw?

[JonB]

Hi Tom:
Thanks for the reply! Think I'll Scale it up just abit to 22.5 in span and corresponding 225 sq in wing area...'Wing area is your friend!"
Thanks for inquiring about my dad "Ben Shereshaw". He is doing great as can be at 93! Still designing models and engines...keeps his mind active...he is always looking for a new and better way to make engines and airplanes. He has many unbuilt and un-published designs on his computer. He does most of his work with Auto-Cad. He also has many gas, glow and deisel engine designs in various sizes from .049 to 6.0cui. radials.
Thanks again,
Jon B. Shereshaw

[BMatthews]

Jon, it's great to hear that your dad, one of our pioneers, is still doing well and has not lost the magic.

Any links to that plane to see what it looks like?

[Mike Taylor]

I have a flying wing that I fly indoors. Although it can slow down for indoor use, it really is happier outdoors, and with a little N-20 can out-run anything else in the gym. Put the nose up and it slows right down. It is 16" ws, ~64 sq", and close to 40 grams, or about 3.2 oz/ft. I'm using a semi-symetrical Horten airfoil that works well. If you can keep yours below 3 oz/ft, you should be OK.

[JonB]

Hi Guys:
Very little documentation on this one, aside from the 3 views on this link and the historical account of the design process and sad ending.
Here is the link:

http://www89.pair.com/techinfo/MassFlow/2_175.htm

I have deceided to increase the ws to 22.5 in and corresponding wing area to about 225.sq. in.. Now I'm lookin for the smallest and lightest out runner brushless that will turn the 4.5 in dia shrouded prop with..some ummmmmph!


Regards,
Jon B. Shereshaw

[Grejen]

What a neat plane. Should make a wonderfull model with all surface takeoff and landing capabilities. Run it down a ramp onto a pond and take off. Put an end to the hydrofoam craze. :D

[BMatthews]

Neat looking airplane.

Jon, for a ducted prop of smaller diameter I would suggest that you're better off with an inrunner that'll spin it at a higher RPM so the prop is more efficient.

Also I know this is sort of off the cuff but I've always considered flying wing and delta wing areas as being 2/3 for lifting and 1/3 for pitch stabilizing. So if my RoT (Rule of Thumb) is valid then your 225 sq inches will act like a regular design with about 150 sq inches of lifting area.