Electric Stunt > Gettin all AMP'ed up!

Electric Airframes

<< < (4/4)

Ron King:

--- Quote from: Dean Pappas on September 22, 2006, 11:39:40 AM ---
Side force generation will permit solid 5.7 second laps. A prediction that you read here first!


--- End quote ---

Dean,

I'm wondering just how well the SFG's will go over with CLPA judges.

Interesting concept. I guess I could attach a couple to a beater and see how well they perform for us. If the performance is there, I'm sure we could find a way to make them "pretty".  ~>

Thanks for the idea,

Ron

phil c:
Frank, a low aspect ratio wing, down in the 4-4.5 range, does handle maneuvers better.  fewer upsets, yaws, etc. from gusts and the lines whipping around.  The problem is the lower aspect wing builds up drag quicker in maneuvers, unless the weight is kept in line.

So, if you want to go the low aspect route, you have to keep the weight in proportion to the span.  A lot of guys are flying 60 oz, 60 in. planes with and AR of 5.2 or so.  If you build the same 700 sq.in. area on 56 in. span you'll need to keep the weight down below 55 oz. or so.  At AR 4 the span will be 53 in. and the weight will have to be kept below 52 oz, probably down below 50.  That gets really hard to do with conventional construction.

You might take a look at really low aspect ratios, like the saucer, or the ARUP.  Supposedly a well-rounded very low aspect wing(~1) does a surprisingly good job keeping the lift and drag in line.

Dean Pappas:
Hi Ron,
Hi everybody,
SFGs don't need to be ugly warts. We are Stunt people, and therefore slaves to aesthetics! Still, it is pleasant service ... Many jet fighters have fences on the wing that were used to prevent spanwise flow: what if they were angled out one or two measley degrees, or airfoiled? Hunt had a napalm/fuel tank under his old F-104, the pylon could be a powerful side-force generator. A fat-fused plane like the Rabe Bearcat or Werwage Jug could have the fuselage angled out a degree or two, compared to the wing, so that it makes side lift, but the wing is still straight: eliminating the tip banging  that always creeps up when the plane is flown inside tip-forward to generate more tension. What about wheel pants and landing gear fairings? On the other hand, I think that purposeful-looking SFGs will sell in Stunt.
later,
Dean

fernando torres:
I wonder if you have considered Tom Morris' Millenium wing which incorporates a 1/16" spar?
Very light.

Navigation

[0] Message Index

[*] Previous page