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Old Jun 28, 2011, 10:36 AM
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cayars's Avatar
Bridgeton, NJ
Joined Mar 2009
2,083 Posts
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Originally Posted by Addicted23D View Post
I have cofg issue, very tail heavy, only just does it balance right with the battery fully forward which would be impossible to strap, picture 2 is where I would like the battery to be, don't want to add weight if possible, everything is stock setup A30-12xl, hacker 70A esc, hitec 85mg, Zippy 4s 2650 40C weight 313g, plane is 1424g.
Have not maidened yet but cant wait looks awesome.
Any suggestions?
For you first flight just try and get the CG right at the front of the wing tube. Put it in the air and fine tune battery placement after that. That will get you very close for the first flight.

Carlo
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Old Jun 28, 2011, 10:41 AM
AJ Addict
Toledo Ohio
Joined Jun 2008
244 Posts
merlin I like to use this set up . Most cuts are small and balsa cuts very easy and quick. A scroll saw works great for the thin plywood that you would use for formers and firewalls..

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Old Jun 28, 2011, 11:16 AM
The loose nut behind the TX
JeffSchre's Avatar
Gladstone, MO
Joined Oct 2010
1,002 Posts
Quote:
Originally Posted by Addicted23D View Post
I have cofg issue, very tail heavy, only just does it balance right with the battery fully forward which would be impossible to strap, picture 2 is where I would like the battery to be, don't want to add weight if possible, everything is stock setup A30-12xl, hacker 70A esc, hitec 85mg, Zippy 4s 2650 40C weight 313g, plane is 1424g.
Have not maidened yet but cant wait looks awesome.
Any suggestions?
Addicted,

I use the same Flightmax 2650s that you are...you should have close to a neutral CG with aft (rearward) end of the battery sitting just on top of the landing gear formers.

I marked up one of you pics to show where I have the rear of the battery with my setup. See light blue lines on attached pic below.

Only difference between our setups is I'm running an Airboss 80.
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Old Jun 28, 2011, 12:07 PM
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robj's Avatar
United States, LA, Moss Bluff
Joined Nov 2008
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Quote:
Originally Posted by JeffSchre View Post
Addicted,

I use the same Flightmax 2650s that you are...you should have close to a neutral CG with aft (rearward) end of the battery sitting just on top of the landing gear formers.

I marked up one of you pics to show where I have the rear of the battery with my setup. See light blue lines on attached pic below.

Only difference between our setups is I'm running an Airboss 80.
Pretty much exactly where mine is, recommended setup. Sometimes I shift it back just a tad.
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Old Jun 28, 2011, 12:19 PM
Ta-dah!
blakevan's Avatar
Texas
Joined May 2007
4,468 Posts
Quote:
Originally Posted by JeffSchre View Post
Addicted,

I use the same Flightmax 2650s that you are...you should have close to a neutral CG with aft (rearward) end of the battery sitting just on top of the landing gear formers.

I marked up one of you pics to show where I have the rear of the battery with my setup. See light blue lines on attached pic below.

Only difference between our setups is I'm running an Airboss 80.

This is where I put mine and works great for me. YMMV
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Old Jun 28, 2011, 12:39 PM
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Nashville , Tennessee
Joined Jan 2009
5,480 Posts
I fly mine with the CG very far back and its great.

No need to worry since you using the recommened setup, the Cg should be right on the money.
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Old Jun 28, 2011, 01:05 PM
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robj's Avatar
United States, LA, Moss Bluff
Joined Nov 2008
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Originally Posted by wamsy55 View Post
I fly mine with the CG very far back and its great.

No need to worry since you using the recommened setup, the Cg should be right on the money.
Where is your battery James?
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Old Jun 28, 2011, 01:30 PM
Team 3DHS
wamsy55's Avatar
Nashville , Tennessee
Joined Jan 2009
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Quote:
Originally Posted by robj View Post
Where is your battery James?
With a 4s 2650 Flightmax Pack I normally set the CG with the front of the battery with the leads facing to the tail slightly less than an inch away from the end of the battery tray.

This makes it pretty neutral leaning towards the tail heavy side. I have flown it slightly forward also and it still great. I have even flown it WAY to forward and it still wasn't to bad.
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Old Jun 28, 2011, 01:56 PM
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Alexandria, Virginia
Joined Mar 2008
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Quote:
Originally Posted by ronmad02 View Post
merlin I like to use this set up . Most cuts are small and balsa cuts very easy and quick. A scroll saw works great for the thin plywood that you would use for formers and firewalls..

You wouldn't be able to easily cut the inside of the balsa wood with this, right? I tried to cut plywood to make a firewall with a hobby knife and.... NOT FUN!

Maybe I should search youtube to see if anyone has posted on how to fix things the way Phil did... hopefully they show their technique used and tools.
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Old Jun 28, 2011, 01:59 PM
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starzen's Avatar
USA, FL, Stuart
Joined Jul 2009
2,723 Posts
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Originally Posted by PlanePhil View Post
Thanks for the quick response. I have a big job ahead. Attachment 4088451
ultracot isnt going to fix that
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Old Jun 28, 2011, 02:05 PM
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Joined Jul 2008
24 Posts
Hey everyone,

I just ordered the 51" slick running a hacker 30-12XL and a airboss 80 amp esc with 85mg servo's. I was woundering if this batt fits in the plane? http://www.hobbyking.com/hobbyking/s...dProduct=11920
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Old Jun 28, 2011, 02:12 PM
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United States, LA, Moss Bluff
Joined Nov 2008
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Not a big fan of the nanos anymore. I like this short stubby thing..
http://www.hobbyking.com/hobbyking/s...idProduct=9320

About the size of some hyperion 2600 vx I run to. Gens ace 2600 has been real nice to.
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Old Jun 28, 2011, 02:14 PM
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Joined Jul 2008
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Thanx i was looking at the nanos 3000 for longer flight time. Whats the flight time on the 2150?
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Old Jun 28, 2011, 02:25 PM
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United States, AZ, Chandler
Joined Oct 2010
429 Posts
Quote:
Originally Posted by merlin703 View Post
By the "table top jig saw", do you mean a scroll saw like THIS one.
Yes I do. It was a scroll saw. It worked good for the plywood.
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Old Jun 28, 2011, 05:33 PM
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ultra stick's Avatar
yuma arizona
Joined Apr 2010
412 Posts
Quote:
Originally Posted by 3Dflyer54 View Post
Thanx i was looking at the nanos 3000 for longer flight time. Whats the flight time on the 2150?
I have a rimfir.32 motor an a casle 75a esc and I'm running a 2200mah and I can only get round 3 minutes on a 3d flight.I could pry get 4 minutes but that would be pushing it....I also have two 2650's but I'm waiting for an adapter for them....hopefuly those will get more air time.
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