HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Feb 28, 2012, 12:09 PM
CNC Cutter
birdofplay's Avatar
United States, IN, Indianapolis
Joined Dec 2005
8,682 Posts
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
birdofplay is online now Find More Posts by birdofplay
Reply With Quote
Sign up now
to remove ads between posts
Old Feb 28, 2012, 12:24 PM
Registered User
USA, CA,
Joined May 2001
1,725 Posts
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
Joe Pierson is offline Find More Posts by Joe Pierson
Last edited by Joe Pierson; Feb 28, 2012 at 12:24 PM. Reason: spelling
Reply With Quote
Old Feb 28, 2012, 01:27 PM
"...certainty is absurd."
kcaldwel's Avatar
Joined Jan 2007
3,632 Posts
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
kcaldwel is offline Find More Posts by kcaldwel
Reply With Quote
Old Feb 28, 2012, 01:35 PM
Registered User
USA, CA,
Joined May 2001
1,725 Posts
Hi Kevin,
Ok thanks for the good information I will fly it with outs winglets first!
Joe
Joe Pierson is offline Find More Posts by Joe Pierson
Reply With Quote
Old Feb 28, 2012, 02:44 PM
CNC Cutter
birdofplay's Avatar
United States, IN, Indianapolis
Joined Dec 2005
8,682 Posts
OK I buy the forwards swept argument, Thanks.

Bob
birdofplay is online now Find More Posts by birdofplay
Reply With Quote
Old Feb 29, 2012, 10:44 AM
Registered User
United States, NY, Bronx County
Joined Nov 2008
191 Posts
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.
Serafin is offline Find More Posts by Serafin
Reply With Quote
Old Feb 29, 2012, 12:36 PM
WAA-08 THANK FRANK!
JimNM's Avatar
Las Cruces, New Mexico, United States
Joined Jun 2002
7,264 Posts
Run the motor just fast enough to spread the prop... Sure to slow the plane down.
JimNM is offline Find More Posts by JimNM
Reply With Quote
Old Feb 29, 2012, 03:55 PM
Registered User
United States, NY, Bronx County
Joined Nov 2008
191 Posts
Quote:
Originally Posted by JimNM View Post
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.
Serafin is offline Find More Posts by Serafin
Reply With Quote
Old Feb 29, 2012, 06:05 PM
CNC Cutter
birdofplay's Avatar
United States, IN, Indianapolis
Joined Dec 2005
8,682 Posts
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.
birdofplay is online now Find More Posts by birdofplay
Reply With Quote
Old Feb 29, 2012, 07:04 PM
WAA-08 THANK FRANK!
JimNM's Avatar
Las Cruces, New Mexico, United States
Joined Jun 2002
7,264 Posts
Quote:
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.
JimNM is offline Find More Posts by JimNM
Reply With Quote
Old Feb 29, 2012, 09:39 PM
Registered User
United States, NY, Bronx County
Joined Nov 2008
191 Posts
Quote:
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
Serafin is offline Find More Posts by Serafin
Reply With Quote
Old Feb 29, 2012, 10:53 PM
CNC Cutter
birdofplay's Avatar
United States, IN, Indianapolis
Joined Dec 2005
8,682 Posts
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.
birdofplay is online now Find More Posts by birdofplay
Reply With Quote
Old Mar 02, 2012, 10:17 AM
Registered User
United States, NY, Bronx County
Joined Nov 2008
191 Posts
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
Serafin is offline Find More Posts by Serafin
Reply With Quote
Old Mar 02, 2012, 10:21 AM
Registered User
United States, NY, Bronx County
Joined Nov 2008
191 Posts
Quote:
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 :-(
Serafin is offline Find More Posts by Serafin
Reply With Quote
Old Mar 02, 2012, 10:21 AM
Registered User
United States, NY, Bronx County
Joined Nov 2008
191 Posts
Quote:
Originally Posted by Joe Pierson View Post
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.
Serafin is offline Find More Posts by Serafin
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
New Product Kit for Marske Pioneer 3 bie Scale Sailplanes 10 Nov 26, 2011 11:00 AM
Discussion Sloping in the Massachusetts Pioneer Valley smrouss Slope 0 Mar 28, 2011 12:56 PM
Sold Sirius Satellite for Pioneer Car Audio rz22g Non R/C Items (FS/W) 2 Mar 25, 2011 09:02 AM