An electric set up - by Ralph and Chris

[Mike Downs]

I have replaced the batteries to Flight tech 3800-11.1v lipos and have done the readings again.....

 

Battery A

 

     Amps                        Watts                      Volts

    No load                                                        12.6

 

     30                                313                         10.6                        1st run

     30                                320                          10.6                       2nd run

 

 Battery B

  No load                                                           12.5

 

    30                                   318                         10.7                        1st rum

   30                                     320                         10.6                       2nd run

 

   Given the speed controllers and the motors does this look OK to go?

   Thanks

[Tim Mackey]

Thats much more like it... the battery is now holding the sort of voltage I would expect and the other figures correspond also.

[Mike Downs]

Thanks for that.......

one more question.....as the amps are 30; does that mean because the juice is going through 2 speed controllers (which are 30 amp controllers) is shared i.e. 15 amps trhrough each,or both taking 30 amps each?

[Tim Mackey]

Yes, shared between the two motors and ESCs.

[John Sheehy]

Just a crazy thought, the motors arn't connected in series by any chance.  Disconnect one motor and see if the other one works.

John.

[Josip Vrandecic -Mes]

Dear Tim,first of all,I'm new leccy as you already know ,so I just started with "operations"on conversion ic trainer to electric one.It was Tiger trainer 0.46 and now has a motor BC 3542/6 1000kv ,according to your recommendation .The  model weight is 1700 g add equipment 440 g ,the result is 2140 g.

Best wishes from your student....

Jo

Edited By Josip Vrandecic -Mes on 24/12/2011 11:21:28

[Frank Skilbeck]

Jo

 

Rather than modify an IC engine mount had you considers fixing the motor directly to the bulkhead like in the photo below, makes it very easy to adjust the standoff and also thrust line.

 

[Stephen Grigg]

Jo if you would like an electric conversion kit ,I have a spare from the Sparrowhawk and could send it to you,would you like it gift wrapped

[Josip Vrandecic -Mes]

Thanks Frank,but due the reason of of CG psn ,I used old long mount,otherwise the crews that were too long ,I don't have such ...in my area has no local shop...

Merry Christmas .

Jo.

Edited By Josip Vrandecic -Mes on 24/12/2011 12:03:53

[Josip Vrandecic -Mes]

Dear Stephen ,no thanks ....this struggle for the equipment is really strong challenging..

By the way...have a good time ....I hope she is there....

Cheers

Jo.

p.s. I wont to tell everyone that you are very kind and nice person ...

Edited By Josip Vrandecic -Mes on 24/12/2011 11:50:12

Edited By Josip Vrandecic -Mes on 24/12/2011 11:51:56

Edited By Josip Vrandecic -Mes on 24/12/2011 12:10:58

[Tim Mackey]

I would agree with Frank on the mounting....but hey if it works for you thats good

Best of luck with it all Jo... please let us know how it all goes after you have flown it.

Best wishes...Tim.

[Josip Vrandecic -Mes]

Frank and Tim,I absolutely agree with Frank solution,but it involves waiting for a month(Hobby King) ,I want to fly ASAP,so, take into consideration ,because I'm not stubborn

person...lol.

Between two options present now,I chose the right side..... Thanks for your time.

Cheers

Jo.