Uses of two flight batteries,re ,retracts
Hi/ I am a new member so treat me gently/ We have been flying elcetric,about5 yrs, we have flown general types,ie Wot 4s etc. now we are branching out to large scale and semi scale,airobatic types. we have been experimenting, with lipo flight batteries and have had some sucsess. we have aquired a large Tucano 70 inc span,complete with retracts, there are two separate flight batteries,but no receiver. what we need is where to plug in the two, obviously one is for the retracts,and one for the R/X. we have a large esc,so where do we put every thing??
There are a few options.
First it will depend on what you mean by "flight battery" if you mean separate packs to power the receiver, not the ESC then:
1) each pack can be plugged into separate ports (channels) of the RX. Each would need its own switch harness. You can Y in with a servo if no ports are unused.
This is to be able to provide higher current to the RX than a single battery can supply. Each switch harness (even "heavy duty") can supply about 5 amps without excess voltage drop. 2 batteries and 2 switches means you can supply up to 10 amps (if the batteries will deliver that much)
2) One pack gets connected to the RX normally. The second is Y's to the retracts with a modified Y. The red lead is cut between the RX and where the Y splits. This isolates the retract power from the RX so a problem with the retracts can not cause loss of control.
If "Flight battery" means LiPos to supply the ESC and motor
1) they might be intended for parallel connection, adding the capacities of the packs for more duration.
2) they may be intended for series connection, adding the voltages for higher power.
Then if one is LiPo and the other is LiFe or NiCd you would be using one to supply the ESC and the other to power the RX system. In this case the ESC would not have a BEC or the BEC would be disabled.
two flight batteries one for retractsetc
Hi Huber/ Thanks for your help,I did mean the two seperate batteries one for the R/X and one for the retracts Your answer is exactly what we needed. thanks for your time.and I will report when we proceed
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