lipo/Rx pack question

[MAXAMUS]

hi guys

i am running a futaba fasst Rx and TX and have a nimh hump pack Rx power pack which is 6v and i think 1500mah i cant remember as the sticker has come off anyway i only seem to get 1 15 min run from it and its then flat any ideas what power it would be drawing or ideas on what i can do ??

also can i get a 2 cell lipo Rx pack or a least put a Rx connector on a 2cell lipo ?

[EPower]

hi there you can run a 2s lipo but you must have a step down regulator something like this should do the trick cheers

http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=4319&Product_Name=TURNIGY_3A_UBEC_w/_Noise_Reduction

Adrian

[EPower]

but if you want the ultimate Rx batt pack you can always get this one

http://www.rchelis.co.nz/product_info.php?products_id=618&osCsid=tt0ippnb6eq6uo0k8cm7mjm326

Cheers Adrian

[MAXAMUS]

hmmmmm thanks but to much bucks for me don't want to spend all that on a rx pack lol

[NativePaul]

If your draining a 1500mah 6 cell RX pack in 15 mins something is seriously wrong, does it have a lot of rudder trim to make it go in a straight line? if so refitting the driveline with more/less offset could fix it and give significant speed improvements too. or if its a hydro check the turn fin is straight, a bent or crooked turn fin can cause it to crab sideways which needs rudder trim to correct.

[Fluid]

Two potential problems are indicated:

1) Pushrod drag is the greatest contributor to receiver pack draw. Poor alignment or high side loads on the pushrod will cause battery draw even when the boat is stopped. Concentrate on reducing this drag if it is present - and it usually is in most all boats, to differeing degrees.

2) The receiver pack is weak. The FASST system - like most 2.4 radios - is highly sensitive to receiver pack voltage. If one or more cells drop off before the others the pack will no longer drive the receiver. You can balance the pack by charging it at 1/10C overnight and see if this fixes the problem. If not - then you probably have a bad cell in the pack. A new NiMH pack usually runs less than $20 from on line sellers.



.

[MAXAMUS]

Thanks guys for the input
i have now tinkered with the drive line trimmed it out and things seem to be better top stuff