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T-REX 600 › CG/battery placement
03-10-2010 05:32 AM  8 years agoPost 1
Spitfire1

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Perth Australia

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I refference to this thread in the main topics:

https://rc.runryder.com/t575506p1/

It states a better way to measure cg is to hold the heli sideways by the main grips as apost to holding it by the flybar.

Ive found when I do this my 600 is way tail heavy, the only problem is in order to get it to balance I need to hang the pack right out the front, so it has no support at the bottom makeing the battery tray very flexible.

Does anyone know what Im talking about and if they have flown with the pack only supported by the tray, the wholes in the sideframe for it to tilt back must be there for a reason, but Im not sure about the pack springing up and down in flight(3d). there is nothing else I can shift forward but the main pack.

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03-10-2010 05:41 AM  8 years agoPost 2
Spitfire1

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Perth Australia

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On a side note, feeling the weight of a 600 holding it up sideways by the main grips gives me a new appreciation of the extreme forces your heli is under when your flipping it over.

At first I was scared of picking it up like that for fear I may damage something or bend the main shaft, but it must be under a hell of a lot more strain when your doing flips or tic tocs!

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03-10-2010 11:23 PM  8 years agoPost 3
epl

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Petaluma,Calif.USA

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T-REX 600 CG/battery placement
Spitefire, I have my tray at a angle for two years and the tray holds the battery just find. It also CG a lot better. I also have in front on the bottom plate one ounce of lead to CG perfectly.

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03-11-2010 01:19 AM  8 years agoPost 4
Spitfire1

rrElite Veteran

Perth Australia

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What Im afraid of is when I do hard manouvers is the battery springing up and down going to effect the heli, or worse break the flimsy battery tray clean off.

6s 5000 brick is a fair bit of weight to be boinging up and down on a flexible plastic tray only a few mm thick.

I would like to try and fly it with good C/G, Im wondering if being tail heavy is why Ive always disliked the way it flies so much.

In the past Ive always just held it by the flybar and if its a bit tail heavy I just live with it, It seem holding it sideways by the main grips is a much better way.

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03-11-2010 10:57 PM  8 years agoPost 5
cub2000

rrVeteran

Massachusetts

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I have Trex-600ESP and I don't use the RX pack so yes, the only way to solve the CG issue is to slide the main pack forward. With the canopy on, it's fine for me. I understand your concern of the battery tray being weak if you slide the pack to the front, but it works for all of us. I haven't seen a complaint about the battery tray broken in hard 3D moves, even with the HV setups.

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