RE: 2300 3S Hypersonic Turbo Pack - Align T-Rex 450  
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All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> RE: 2300 3S Hypersonic Turbo Pack - Align T-Rex 450
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RE: 2300 3S Hypersonic Turbo Pack - Align T-Rex 450 - 9/19/2007 6:19 AM   
caotri


 

Posts: 6
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Joined: 8/24/2007
Last Login: 10/12/2007
From: Hochiminh city, VIETNAM
Status: offline
quote:

ORIGINAL: kgfly

Thanks for sharing that info. I have 3 DeWalt packs on the way and have been wondering about running 3s or 4s on my T450 (430L-3550kv, 12t). I will be *very* interested to see the results of your testing 6s on the HDX500, I have my eye on that heli I plan to try 6s in my Logo10 where I am currently running 5s emoli.

Hi, Where about you are in Melbourne. I had been in Melbourne awhile and really love this city.

i just got the hdx500 direct link frame this morning so the try will be done on next weekend, It is so busy this time.
I will let you know ASA i got the test. This weekend I may test with standard SE hdx500 first.

@ the 4S is too heavy for 450 size i beleave. #s already over weight.





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RE: 2300 3S Hypersonic Turbo Pack - Align T-Rex 450 - 9/19/2007 6:32 AM   
kgfly


 

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From: MelbourneVictoria, AUSTRALIA
Status: offline 		I live in Glen Iris. I cannot return the compliment, I have not yet been to Vietnam.

Be great to see a comparison between your results on the two different HDX500 setups so please do try it on the SE first and then the SA.

Yep, I know about the weight issues but there are numerous reports of folks happy doing sport flying with 4s A123 on TRex450. Some make a split pack, 2 cells up front and two strapped under the main shaft or one each side like saddle bags. Some drop the battery tray to near vertical and simply stand a 4s brick up the front. 3s A123 will be low headspeed (hence hairylama's need for a bigger pinion) and short flight times, but may still be the better compromise. I won't see my A123 packs for a month or two so plenty of time for more research

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RE: 2300 3S Hypersonic Turbo Pack - Align T-Rex 450 - 9/24/2007 5:36 AM   
caotri


 

Posts: 6
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Joined: 8/24/2007
Last Login: 10/12/2007
From: Hochiminh city, VIETNAM
Status: offline 		I lower the battery tray, and 3S just stand next to the frame as the trex600. It is rather well balance but it the heli is getting slow. i beleave because low headspeeed. I am using 15T pinion on JGF500TH 3380kv motor. and Pro woodblade. IF can get higher HS and carbon balde will Ok.

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RE: 2300 3S Hypersonic Turbo Pack - Align T-Rex 450 - 9/24/2007 5:57 AM   
kgfly


 

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From: MelbourneVictoria, AUSTRALIA
Status: offline 		Well 3s A123 on 3380kv/15t should be about: 3 x 2.8 x 3380 x 15 x 0.9 / 150 = ~2500rpm. That should be OK for sport flying but most would consider it unsuitable for 3D. If you want higher headspeed you would have to go to 4s and 13t which with the same motor would be closer to 3000rpm but of course then you would have the extra ~80g to deal with.

Certainly A123 is not a high performance option for a 450-class heli, lipos definitely win out in this size range. In terms of power/weight lipos always win out. However in larger helis the tradeoffs start to shift and high power A123 configurations become viable, just with shorter flight times than equivalent power lipo setups.

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