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Old Aug 16, 2012, 06:17 PM
blucor basher's Avatar
United States, PA, Lancaster
Joined Jun 2003
24,141 Posts
The "quit flying" behavior is caused by a tail-heavy CG. By way of explanation (short version) at landing speeds the tail is ineffective at producing lift compared to the wing (b/c it's smaller) causing a tail heavy plane to drop its tail, slow down more, and stall. Conversely, as the tail loses lift at low speeds, a nose heavy plane drops its nose, self-correcting the situation. This is reason #982 that tail-heavy planes are challenging.
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Old Aug 16, 2012, 08:24 PM
JKasprak
propchief's Avatar
Fayetteville, NC 28304
Joined Jan 2010
841 Posts
Unfortunately most tail heavy planes are toast somewhere between reasons 1-981.
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Old Aug 16, 2012, 09:19 PM
On loan to Texas
Ohio AV8TOR's Avatar
United States, TX, Benbrook
Joined Oct 2005
5,325 Posts
So the question I have then is when CG is set per the manual is that a tail heavy plane by Bens statement?
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Old Aug 16, 2012, 09:53 PM
inverted-i-fly
3drcparts's Avatar
United States, CA, Petaluma
Joined Mar 2011
4,441 Posts
I had to add 1 oz of nose weight to get this to Cg, I hate doing it, but it flys great now
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Old Aug 16, 2012, 09:58 PM
TEAM HILLBILLY
3Dplank's Avatar
United States, MN, Minneapolis
Joined Mar 2010
4,507 Posts
Quote:
Originally Posted by Inverted-I-Fly View Post
I had to add 1 oz of nose weight to get this to Cg, I hate doing it, but it flys great now
Are you using pull pull?
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Old Aug 16, 2012, 10:02 PM
inverted-i-fly
3drcparts's Avatar
United States, CA, Petaluma
Joined Mar 2011
4,441 Posts
yes, hs65mg, 103g, hobbywing platinum 40a esc
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Old Aug 16, 2012, 10:04 PM
Team Twisted!
hone1er's Avatar
United States, CA, Hercules
Joined Dec 2011
4,303 Posts
Quote:
Originally Posted by Inverted-I-Fly View Post
yes, hs65mg, 103g, hobbywing platinum 40a esc
You should take that ounce out and put 130g on there
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Old Aug 16, 2012, 10:04 PM
TEAM HILLBILLY
3Dplank's Avatar
United States, MN, Minneapolis
Joined Mar 2010
4,507 Posts
Quote:
Originally Posted by Inverted-I-Fly View Post
yes, hs65mg, 103g, hobbywing platinum 40a esc
Oh, ok I have the 130g in mine.
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Old Aug 16, 2012, 10:07 PM
inverted-i-fly
3drcparts's Avatar
United States, CA, Petaluma
Joined Mar 2011
4,441 Posts
Quote:
Originally Posted by hone1er View Post
You should take that ounce out and put 130g on there
yep, but for now I like it, I don't think it lacks power for what I want it for, my 60" extra with 4315-480 on 6s is my power ship
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Old Aug 16, 2012, 10:40 PM
Registered User
United States, WI, Milwaukee
Joined Sep 2008
793 Posts
I like to have mine on a switch instead of throttle based.

Brownie
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Old Aug 16, 2012, 10:41 PM
On loan to Texas
Ohio AV8TOR's Avatar
United States, TX, Benbrook
Joined Oct 2005
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Quote:
Originally Posted by hone1er View Post
you should take that ounce out and put 130g on there
+1.
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Old Aug 17, 2012, 11:26 AM
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dentalpain's Avatar
United States, FL, Marianna
Joined Apr 2011
860 Posts
Guys about to order this, how does my setup look
Omega 130g w/ 13x6.5 or 14x7
hs65mg tail, hs65hb aileron (already have these and long arms)
ice 50 lite (already have)
gens 3s 2200 (I have 3x25c but may order some 60c)
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Old Aug 17, 2012, 12:20 PM
TEAM HILLBILLY
3Dplank's Avatar
United States, MN, Minneapolis
Joined Mar 2010
4,507 Posts
Quote:
Originally Posted by dentalpain View Post
Guys about to order this, how does my setup look
Omega 130g w/ 13x6.5 or 14x7
hs65mg tail, hs65hb aileron (already have these and long arms)
ice 50 lite (already have)
gens 3s 2200 (I have 3x25c but may order some 60c)
Looks good 14x7 would be the prop to get
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Old Aug 17, 2012, 12:49 PM
On loan to Texas
Ohio AV8TOR's Avatar
United States, TX, Benbrook
Joined Oct 2005
5,325 Posts
Quote:
Originally Posted by dentalpain View Post
Guys about to order this, how does my setup look
Omega 130g w/ 13x6.5 or 14x7
hs65mg tail, hs65hb aileron (already have these and long arms)
ice 50 lite (already have)
gens 3s 2200 (I have 3x25c but may order some 60c)
Probably work okay but here are my thoughts;

The HB servo is not a metal gear servo. I do not think long arms are a good thing as you will increase the leverage and stress loads on the plastic gears. Aileron will have enough travel on standard length single arm.

With the 65MG in the tail the battery will be tucked under the cowl that you might not like. I am using 3S 2200's also and pull pull and with a super lightweight Falcon 13x6.5 wood prop I can only get one strap on with about 1" of the battery sticking out from the cowl. When I switch to a 14x7 APC prop (heavy prop) the battery moves back about 1-1/4" or so.

My 2200's are 35C Glaciers and are amazing. I fly 6 minutes and land with 3.78v/cell average and are barely warm.

I am still undecided on the right prop. I don't really like the APC and will wait for the Falcons to be back in stock or I will get a Xoar in 14x7. I do se that Joe flys the 13x6.5 in this with a O130g motor.
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Old Aug 17, 2012, 12:53 PM
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dentalpain's Avatar
United States, FL, Marianna
Joined Apr 2011
860 Posts
Do u think 65hb on ailerons will be okay with stock arms. Im pulling these from another build. Its not a big deal to pick up some 65mg if they make a difference.
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