MJD

My Feedback: (1)

It is hard to tell from the pictures on these sites, but it looks to have only a moderately thick airfoil - maybe 12%? - and I like the planform. I wonder if a pair of Sport Jett .50's would qualify it for this forum, or would it need more power (what doesn't)?

[link]http://www.brcdesign.com/lcrc/mm2008-print1.pdf[/link]

[link]http://www.ripmax.com/Instructions/harmony.pdf[/link]

MJD

p.s. let me guess, this has already come up?...

rmenke

My Feedback: (13)

MJD:

Twin 50 LX engines should make this thing scoot if not tooo draggy. Naturally two 60LX's would be a tad better in MHO, they are same size and approx. weight. Regardless be sure you get the LX model of either, its good for another 1500 rpm or so. ENJOY PS: A 12% wing is very thin compaired to the usual 18% or so.

k8svrick

Doesn't look like a jet to me.

evan-RCU

Jett is a brand of piston engines....

SpeedBoy

Sorry for my question guys but ..... how do you get the % of the airfoil ???

The airplane looks like an Ultra Sport twin to me

Mike Connor

My Feedback: (5)

12% was a guess. I would guess 15-20%. I would also think a duellist would be a better choice for speed.

MJD

My Feedback: (1)

I have a Duellist 2/60 kit, I dunno if it looks any thinner in the wing than this does. I'll take another peek. But the thing here is that this is an ARF - a strong point for lazy sods like me!

All the wing root pictures are at an angle, so I was of course guessing at the thickness. It looked like either a thicker symmetrical or medium thick "semi" symmetrical, but the resolution wasn't good enough. Or my eyesight, which is more likely the case.

MJD

EDIT: p.s. plus, the color scheme is pretty snazzy, even to a Canuck. Gee, [sm=bananahead.gif] I wonder to which major RC product consuming nation the color scheme was designed to appeal?

combatpigg

My Feedback: (3)

SpeedBoy, a wing with a 10 inch chord and 2 inch thickness would have a 20% thick airfoil. The fastest models that I've paid attention to have 8% airfoils.
The payback in speed with twins just isn't there. I think the best application for twins in models is simple fun.

SpeedBoy

Uhmm ....... okey I notice it was a guess hehe but we suppose that we have the wing in our hands , what measured we need to take to get the % ??? for example in this case MJD is talking from a 12 % and Mike about 15-20% that percentage from what ???.

I'm trying to figure out what % does have draggy Airplanes like Patriot and Shrike .

Thanks for the previous answer Mike and MJD .

edit ... upsss , when I was writing , you were been answering me combatpigg , thanks for your answer

combatpigg

My Feedback: (3)

You are welcome SpeedBoy.
I think alot of manufactured "fast" models go with thicker airfoils for structural reasons. It takes more work to make a thin wing as strong as a thicker wing.

k8svrick

I am aware of that. I meant the airplane doesn't look like a jet.

MJD

My Feedback: (1)

Quite true! I don't think for a minute this is a contender in the world of RC speed. Rather, it's just a snazzly looking twin that could probably be coaxed to move along with excess power. And it's an ARF..

Now, tandem engine arrangements on the other hand.. hmm.

k8svrick

It's a lot of fun until someone loses an engine. That said, a couple of properly tuned and operated engines will mitigate the likelihood.

bob27s

My Feedback: (19)

Does indeed look like a twin UltraSport 60 ...

Should fly well