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Old Feb 28, 2012, 01:09 PM
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The Up is understandable.as it fixes the lack of reflex in the airfoil.

However, as a wing increases the aoa the tips tend to stall first which results in Tip Stall.

Traditionally wings are built with a little Wash Out to prevent this.
It allows the Tips to keep flying while the center section is nearing or stalled.

IF a tip were to stall first it would spread rapidly across the wing.

Results would be BAD if a low altitude.

I'm waiting for some SLOW Flight Vids of this thing !

Bob
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Old Feb 28, 2012, 01:24 PM
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Wing tips


Hi Bob,
I do agree with you on that I am adding some winglets that I have to mine!
Also no more funky tattoo graphics, as I like all White wings.
Joe
Last edited by Joe Pierson; Feb 28, 2012 at 01:24 PM. Reason: spelling
Old Feb 28, 2012, 02:27 PM
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Advancing the Schmilblick!
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The full-size Pioneer does not have wash-out. The forward swept 1/4c should drive the stall towards the centre section first. Aft swept wings load the tips, forward sweep loads the centre section. Some wings with more forward sweep have wash-in.

Wash-out can also be added by changing the airfoil along the span, so just because you don't see wash-out in a glider doesn't mean it doesn't have any.

If good low Re airfoils are used on the Pioneer, it shouldn't need wash-out.

Tip fins aren't a great idea on a forward swept wing. The side area ahead of the CG will make the glider yaw unstable. Try flying it without the winglets, at least until you get it trimmed.

Kevin
Old Feb 28, 2012, 02:35 PM
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Hi Kevin,
Ok thanks for the good information I will fly it with outs winglets first!
Joe
Old Feb 28, 2012, 03:44 PM
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OK I buy the forwards swept argument, Thanks.

Bob
Old Feb 29, 2012, 11:44 AM
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Speed. The Need for Slowness


Like to know how slow can she fly before stalling, does she drop her nose in stalling or a wing. Do you need two football field to land her since she don't have flap to slow her down. Any idea on how to brake her speed with out the stall. She looks fast.
Old Feb 29, 2012, 01:36 PM
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WAA-08 THANK FRANK!
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Run the motor just fast enough to spread the prop... Sure to slow the plane down.
Old Feb 29, 2012, 04:55 PM
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Run the motor just fast enough to spread the prop... Sure to slow the plane down.
Sound good to me. Guess I have to order a whole lot of prop till I get my timing right. Can see a whole lot of prop ground strikes.
Old Feb 29, 2012, 07:05 PM
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I thought that my FOX was going to be fast and hard to land and keep foam intact.

It turned out to be a floater and easy to land slow.

So I am hoping for similar results with the Pioneer.

Despite all my objections I went ahead and Ordered one.
Old Feb 29, 2012, 08:04 PM
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Originally Posted by Serafin View Post
Sound good to me. Guess I have to order a whole lot of prop till I get my timing right. Can see a whole lot of prop ground strikes.
It is not hard to close the throttle at the last moment... Not hard at all.
Old Feb 29, 2012, 10:39 PM
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Originally Posted by Serafin View Post
Like to know how slow can she fly before stalling, does she drop her nose in stalling or a wing. Do you need two football field to land her since she don't have flap to slow her down. Any idea on how to brake her speed with out the stall. She looks fast.
Wonder if these Pop up brake would work to slow her down to a landing or send this tailless glider to a deadly nose down dive. http://www.hobbyking.com/hobbyking/s...Pair_Set_.html
Old Feb 29, 2012, 11:53 PM
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Gotta find the right spot on an FW or lots of pitch will get induced.

I suppose you could try it where Marske put the Full sized ones.

Then again as I said above, about my Fox, It might just be light enough to not need it.
A foam plane cant have much inertia that slow down mechanisms are necessary.

Regardless those units need TLC by removing all the plastic burrs and flash
and some lube to make them operate smoothly.

Also be sure to have a good DOWN LOCK becasue Lift sucks those things right up
sometimes even when NOT deployed. That DG1000 was bad that way for me.
Old Mar 02, 2012, 11:17 AM
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The Top Speed IS.......


Looks like it fly like a Zagi 50 inch. I know she new but anyone knows her top speed and does she flap at top speed like some delta wing has a bad habit doing? She look clean with no drag unlike my F-27C Striker
Old Mar 02, 2012, 11:21 AM
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Originally Posted by BarnOwl View Post
I found a youtube video. It seems to have a very stable flight:

http://www.youtube.com/watch?v=HOW5ibPf3tw
Blocked in the USA to see this video,,SMH :-(
Old Mar 02, 2012, 11:21 AM
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Hi Bob,
I do agree with you on that I am adding some winglets that I have to mine!
Also no more funky tattoo graphics, as I like all White wings.
Joe
Nice Pool.


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