HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Jun 28, 2014, 05:59 AM
Registered User
India, TN, MAS
Joined Aug 2013
161 Posts
Discussion
ft flyer cg point

where should the cg be in an ft flyer
rcniteshrc is online now Find More Posts by rcniteshrc
Reply With Quote
Sign up now
to remove ads between posts
Old Jun 28, 2014, 01:56 PM
Hot glue held together by foam
United States, WA, Vancouver
Joined Aug 2010
2,399 Posts
Quote:
Originally Posted by rcniteshrc View Post
where should the cg be in an ft flyer
On the plans for the FT Flyer , the CG is indicated by the two little blue circles with + signs inside them .
balsa or carbon is offline Find More Posts by balsa or carbon
Reply With Quote
Old Jun 30, 2014, 08:50 AM
Registered User
India, TN, MAS
Joined Aug 2013
161 Posts
my cg is 1" behind that point
rcniteshrc is online now Find More Posts by rcniteshrc
Reply With Quote
Old Jun 30, 2014, 11:44 AM
Hot glue held together by foam
United States, WA, Vancouver
Joined Aug 2010
2,399 Posts
Quote:
Originally Posted by rcniteshrc View Post
my cg is 1" behind that point
If it flies well - great !
If it doesn't , move the battery forward until it flies well .
balsa or carbon is offline Find More Posts by balsa or carbon
Reply With Quote
Old Jun 30, 2014, 05:00 PM
Whatever goes up must go BOOM
joker24458's Avatar
United States, OH, Kent
Joined Mar 2012
2,070 Posts
My FT Flyer is also quite tailheavy - that's just how I like it. I find that at neutral it will go straight forward with throttle application, but tail heavy will harrier easier.....and at the places where I fly it at, I prefer to harrier around instead of going faster. My suggestion is to move the battery around until you are happy with the way the plane flies. If you are already happy with it, great - just keep it that way.

-Andres
joker24458 is offline Find More Posts by joker24458
Reply With Quote
Old Jul 01, 2014, 04:07 AM
Registered User
India, TN, MAS
Joined Aug 2013
161 Posts
with battery on the most forward part
rcniteshrc is online now Find More Posts by rcniteshrc
Last edited by rcniteshrc; Jul 01, 2014 at 04:18 AM.
Reply With Quote
Old Jul 01, 2014, 05:05 AM
Registered User
India, TN, MAS
Joined Aug 2013
161 Posts
this is my first plane
rcniteshrc is online now Find More Posts by rcniteshrc
Reply With Quote
Old Jul 01, 2014, 05:35 AM
Teddy Ong
Teddy Ong's Avatar
Joined Nov 2012
562 Posts
As you become better and better, you will be able to tolerate more and more weird CG positions.
Generally, backwards cg = touchy, likes to pitch up (down in some cases), and stresses you out from lots of correction.

Forwards cg (too much) = too sluggish, tendency to pitch, not enough control authority, etc
Teddy Ong is online now Find More Posts by Teddy Ong
Reply With Quote
Old Jul 01, 2014, 05:41 AM
Registered User
India, TN, MAS
Joined Aug 2013
161 Posts
so, should i fly
rcniteshrc is online now Find More Posts by rcniteshrc
Reply With Quote
Old Jul 01, 2014, 06:28 AM
Teddy Ong
Teddy Ong's Avatar
Joined Nov 2012
562 Posts
Of course. have you practised on simulators or mentally prepared?
Teddy Ong is online now Find More Posts by Teddy Ong
Reply With Quote
Old Jul 01, 2014, 08:07 AM
Registered User
India, TN, MAS
Joined Aug 2013
161 Posts
have done both
rcniteshrc is online now Find More Posts by rcniteshrc
Reply With Quote
Old Jul 01, 2014, 10:59 AM
Hot glue held together by foam
United States, WA, Vancouver
Joined Aug 2010
2,399 Posts
Quote:
Originally Posted by rcniteshrc View Post
with battery on the most forward part
In the photos it looks like you could turn the battery around ( wires in the back ) and move it forward so it's flush with the firewall . If that doesn't give you the correct CG , try a heavier battery or add a little weight to the nose .

Al
balsa or carbon is offline Find More Posts by balsa or carbon
Reply With Quote
Old Jul 02, 2014, 06:43 AM
Registered User
India, TN, MAS
Joined Aug 2013
161 Posts
I can't twist the battery if i do i can't put the landing gear
rcniteshrc is online now Find More Posts by rcniteshrc
Reply With Quote
Old Jul 02, 2014, 04:12 PM
Registered User
Finland
Joined Aug 2013
86 Posts
Some ideas / suggestions...

What about moving your servos forward to the original place as designed? I guess that's the original reason for your tail heavy CG. Have you moved ESC and receiver as forward as you can?

I would also recommend you to mount the landing gear somewhere else than directly on the lipo. Two reasons:
1. Lipo batteries are easy to ignite/burn if physically damaged. And now you've got the metal part which takes the most of the landing force attached to the lipo.
2. If you want to use multiple batteries to fly several flights it's really hard to change the battery as it is now.

I would just attach the landing gear as FT guys do. Then maybe use another set of bands for the battery. But before this I would move all the electronics as front as I can.

I've got quite many hours behind my FT Flyer doing training flights (yeah, you can see my son smiling after successful flight) and my friends have build their own too. As long as we've followed the design we haven't had CG problems. And at least I've stuck on flying on CG as instructed by FT guys / instructions.

Anyways it's quite durable design and also easy to fix / repair / rebuild, mine is in really good condition even though it has seen first flights for several of my friends (buddy box used on most of these for takeoff & landing). And it flies slow... It doesn't handle wind too well so pay attention to have your first flights when it's calm (my friends FT Flyer spent night in a tree as a gust surprised him, fortunately wind during night had brought the plane down).
Late99 is online now Find More Posts by Late99
Reply With Quote
Old Jul 03, 2014, 04:52 AM
Registered User
India, TN, MAS
Joined Aug 2013
161 Posts
thanks late 99
the servos can't be moved as the pushrods i have are short
rcniteshrc is online now Find More Posts by rcniteshrc
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Homemade CG balance stand for micro flyers Altbob Foamies (Scratchbuilt) 2 Apr 29, 2014 11:56 AM
Question Valenta Swallow CG point ? Duke58 Slope 1 Apr 24, 2014 11:07 PM
Help! New used Katana MX need cg point please drbob64 3D Flying 1 Sep 30, 2013 09:36 AM
Sold Rubbermaid Big Max Ultra 10 ft. 6 in. x 7 ft. Storage Shed RcCrawler82 Non R/C Items (FS/W) 0 Sep 24, 2013 03:28 PM
Question USCG 82 ft Point class cutter DDG 51 Scale Boats 10 Oct 23, 2012 03:53 AM