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Dart Number One

November 08, 2007

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This page has 6 comments.

 Frank Hasty
Brunswick, GA
Posted:June 17th, 2006
1.22 AM
In 1966-67 Scientific American Magazine held the "1st. International Paper Airplane Competition" and thereafter published "The Great International Paper Airplane Book". It is now recognized as the definitive work on the subject, and I have a copy! You may be interested to learn that the winner in the "Distance Flown" category closely resembled the "Dart", and it had no fin. The "Duration" winner was also similar in shape but had "winglets" or tip fins as "winglets" on real planes had not been discovered in 1966. Incidentally there were 12,000 entries in the competition.
Posted:March 27th, 2006
9.03 PM
Some sort of vertical would definitely make your world much easier on the dart. Get the warp out, it is not helping at all and you will end up fighting it all day. You don't have much (any) airfoil but with a flying wing you will want some reflex (up elevator). With this design I would be a little cautious of using just up elevator since you have more elevator area in the center than the the tips. I'm thinking that a 'warped' elevon surface would give some washout effect for stability and also the reflex needed for the flying wing.
Posted:March 27th, 2006
6.55 PM
You know far more about this than most. Here's my 2 cents. The dihedral idea sounds right, the fin is probably a good idea because you don't have any other stabilizing surfaces (side view fuse shows little contribution here) and if you think about it, a paper airplane folded in this configuration still has a bit of airfoil in the wing. The 'V' shaped fuselage cross section in a paper airplane is where the fin stability might come from.
I am probably way wrong here but there you have it. I can see this Dart being painted light yellow and light blue lines across it every 1/2 inch from the nose to tail. I can also see a light weight giant paper clip made from silly string attached to the nose for that authentic look.
I wonder if your Gonzo would be willing to carry the Dart high up and drop launch just for kicks.
 Bill Gaston
South Texas
Posted:March 27th, 2006
10.40 AM
Back in the middle eighties, Model Airplane News had a 0.049 powered pusher "DART". It was a free flight. Much discussion about the C.G. Then the guy put one channel (Rudder), it flew. It was built up and about 30 inches long.
 Steve E
Essex UK
Posted:March 27th, 2006
7.52 AM
As said, dihedral would certainly help. If not that, then at least a fin (or possibly two about half span each wing).

For what it's worth, I checked you MAC with a CAD program, but found no discepencies.

I have previously flown some pattern ships - one test for the CofG is to observe the trim change with differnet speeds. If you slow the model up and it nose dives considerably then the CG is probably too far forward - I would have expected your dart to have gone further than 20 feet.

I'd at least sort the warp and add a fin, and then retry.

Best of luck.
 jan brilman
Posted:March 27th, 2006
4.21 AM
How about adding some dihedral?

I have never glued the two layers of paper that form the wing to one another.

That makes may be for some sort of profile . . .

Interesting project!


jan brilman

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