Radian (NOT pro) 2m settings. - WattFlyer RC Electric Flight Forums - Discuss radio control eflight

Hi-Performance and Sailplanes RC hotliners, electric pylon racers, F5B, F5D, sailplanes and gliders

Radian (NOT pro) 2m settings.

Old 01-04-2015, 09:54 PM
  #1  
Davethebluessinger
Child of the 60s
Thread Starter
 
Davethebluessinger's Avatar
 
Join Date: Sep 2010
Location: Rugeley, Staffordshire, UK
Posts: 1,082
Default Radian (NOT pro) 2m settings.

Hi, a friend (against my advice) bought a Radian as his first plane.

He has 4 2200 3s lipos We've tried using these (recommended is 1300mah) and despite spot on balancing at the recommended 63mm back from the leading edge the plane is VERY tail happy, it appears to need some Elevator downtrim in a mix with the throttle to stop it ballooning can anyone advise from experience?

Also the travel on the rudder at 100% is MASSIVE, probably 1 1/2 inches movement each way, what sort of movement does the Radian need to fly smoothly with enough deflection to turn?

He is currently repairing the fuselage!
Davethebluessinger is offline  
Old 01-04-2015, 10:17 PM
  #2  
Yakfishingfool
Member
 
Join Date: Sep 2012
Posts: 215
Default

Sounds like you need to move the battery forward to balance and throw some expo in the radio to dull up the stick centers. Full throw should be ok with increased expo.
Yakfishingfool is offline  
Old 01-04-2015, 11:04 PM
  #3  
fhhuber
Super Contributor
 
fhhuber's Avatar
 
Join Date: Mar 2013
Posts: 4,786
Default

Sailplanes are often balanced somewhat aft to improve glide efficiency. Its perfectly OK to move the CG forward so it flies the way you want.

You NEED about 20 degrees +/- from neutral to fly the aircraft. There are times you might want 45 deg up (can't think of use for 45 down in a sailplane, but normal is to have up and down even) A trick for getting out of a thermal is to apply full up and full rudder forcing a spin. Higher throw elevator will accelerate the spin and help get the plane down.
With the heavier battery this might apply excess G and break the wing, but the weight would tend to make it easier to get out of a strong thermal without the spin.
fhhuber is offline  
Old 01-05-2015, 01:19 AM
  #4  
xmech2k
Ya got any Beeman's?
 
xmech2k's Avatar
 
Join Date: Apr 2009
Location: San Diego, CA
Posts: 3,099
Default

Hi Dave. I fly a Radian in our club's LMR contest each month. The Radian will pitch up, a lot, with power! It would just do loops under power if you don't push down elevator. You can either add a mix to the throttle(More desirable if flying around with the throttle on, I guess), or you just have to push down during climb. Of course, a mix will take some experimenting to get just right. I think other than that characteristic, it's a great, gentle flyer for new pilots. I'm not sure what my rudder throw is. Did he set it per the manual? It's such a gentle flyer, I don't think that will be too much. Part of our LMR contest is spot landing for extra points, so the big rudder throw could be a good thing in that regard. Well, your friend isn't doing that though.

Oh yeah, How did you get that battery to fit?!? 1300's should be pretty cheap, I'd try to get some.
xmech2k is offline  
Old 01-05-2015, 01:18 PM
  #5  
Davethebluessinger
Child of the 60s
Thread Starter
 
Davethebluessinger's Avatar
 
Join Date: Sep 2010
Location: Rugeley, Staffordshire, UK
Posts: 1,082
Default

Hi and thanks to all for the responses.
xmech2k, to fit the 2200 batterys we shaved about an 1/8th of an inch from the width and the height of the compartment and they slide in snug. Guess it's a matter of launching with less power and dialling in a mix with the throttle and elevator. The rudder throw seems massive and I don't think there are any recommended throws in the manual. As for mixing on a Devo 7 I haven't got a clue but I'll set him up on my Spectrum TX and take it from there.
Davethebluessinger is offline  
Old 01-05-2015, 02:42 PM
  #6  
xmech2k
Ya got any Beeman's?
 
xmech2k's Avatar
 
Join Date: Apr 2009
Location: San Diego, CA
Posts: 3,099
Default

I kind of like the climbing under power characteristic. It makes hand launching easier as you can control the pitch with the throttle for that moment when my right hand releases the plane until it gets to the stick.
xmech2k is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
smokejohnson
Heads UP RC discussion
308
05-06-2017 03:20 AM
thepiper92
Hi-Performance and Sailplanes
28
05-05-2015 12:17 AM
sotjet
Hi-Performance and Sailplanes
3
12-06-2012 07:37 PM
Fulanito_uk
Hi-Performance and Sailplanes
5
09-22-2011 05:58 AM
terrynshed
Motors and Speed Controllers for sale & WTB
0
12-28-2010 08:46 AM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Quick Reply: Radian (NOT pro) 2m settings.


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.

Page generated in 0.09021 seconds with 15 queries