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Old 10-05-2008 | 04:58 PM
  #328  
ticketec
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From: Brisbane, QLD, AUSTRALIA
Default RE: CMP BF109F BUILDING THREAD


ORIGINAL: Schummie


ORIGINAL: kahloq

A 2000mah battery is fine if you dont mind charging the rx battery in the plane at the field after 2 flights or so. With 10 servos, some of them digital, they are pulling a good deal of juice. If any of them(and usually more then one) start chattering, they start consuming even more. I dont think you want to risk a nice $1000+ airplane to a brown out shutdown of the rx due to the voltage dropping below the rx's failsafe level.
yes a 2000 will work, but how many planes has anyone flown with 10 servos in it and been able to fly more then twice before the rx battery voltage gets dangerously low.

I have the H9 1.50 P-51 and it also has 10 servos. I run a 6v 2700mah battery in that one and can safely fly 4 flights in a day without charging. Anymore then that, and the little charging chack with the led lights goes to yellow instead of green.

My advise, why risk a high value plane over a difference of maybe $10 for a battery size.
Thanks Kahlog,

I'll use a 4000 Mah battery. But do you connect all the servo's directly to the receiver? I mean, can the receiver handle all the amps. Further I hear that using 6v would have a negative effect on the servo's. What's your experience with that?

regards,

Eric Schumacher, Netherlands
THere are a fair few futaba servos that don't work at 6v.

Rather than buying 1 R/X pack at 4000mah, you are much better off using 2 2000mah packs. Most of the warbird guys i fly with (myself included) use 2 r/x packs for redundancy. in fact in australia, you must have dual r/x packs if your model requires a Heavy model inspection. not that this 109 is going to be that heavy, but the number one killer of R/C models, after their owners are r/x packs and r/x switches. well worth having.

I'm still sitting here waiting for my lower cowl and rudder that were not in the box when i received this model to arrive[:@][:@].

thanks

dave