TOPIC: The Cyprus peanut scale twin engine F104

The Cyprus peanut scale twin engine F104 10 Dec 2017 14:30 #31

  • Eric
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BB, I think Simon was teasing - we all know he's a skinflint! [badass]
if you are calm and collected when all about you are going berserk - you've missed something important!
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The Cyprus peanut scale twin engine F104 10 Dec 2017 18:35 #32

  • THE BLACKBIRD
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No it's by far not the first time
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The Cyprus peanut scale twin engine F104 10 Dec 2017 23:23 #33

  • bond007mas
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[badass]
Quite right BB
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The Cyprus peanut scale twin engine F104 10 Dec 2017 23:45 #34

  • Quorneng
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BB
My apologies.
The comment was not intended to be any sort of criticism. I simply can't afford to build such a model - I only wish I could!
I will be following with interest!
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The Cyprus peanut scale twin engine F104 Yesterday 16:35 #35

  • THE BLACKBIRD
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A question, on a model that has 7v power supply like my jets that go's through a power box switch that converts it 6v to the receiver, could a high voltage servo :ie 7v be used if the power red wire was connected direct to the servo through a separate switch
I think it would be OK, but then I know nowt
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The Cyprus peanut scale twin engine F104 Yesterday 21:41 #36

  • Eric
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Without knowing much about turbines (other than I can't afford them!) I'd say yes.
BUT - where is the 7v coming from? It's an odd voltage! A 5-cell nimh gives 6v, and a 2 cell lipo gives nearly 9v when freshly charged, and drops to 6.4 at the end of a charge.
So - it depends on how 'clean' and stable the 7v is - no electronic noise sneaking in via the power line, to corrupt the digital output signal of the receiver.
Perhaps someone more turbine-wise can answer.
if you are calm and collected when all about you are going berserk - you've missed something important!
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The Cyprus peanut scale twin engine F104 Yesterday 22:47 #37

  • THE BLACKBIRD
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Hi Eric, the high voltage servos are designed to run off 2 S lipos which is where the power would be coming from, normally the power gos through a high voltage receiver
As I will be using a normal Futaba receiver I wondered if I could run the power line, red wire, direct from lipos to servo through a switch, with the black and signal wires going into the receiver
The reason for asking is the servos I was going to use and what I built for were normal voltage but if I use the high voltage version of the same servo I get twice the power from it with no increase in weight
or sized
It has nothing to do with the turbine as it has its own life battery
Last Edit: Yesterday 22:49 by THE BLACKBIRD.
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The Cyprus peanut scale twin engine F104 Yesterday 23:33 #38

  • Quorneng
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BB
What you are proposing is used in RC trucks where big digital servo are used. The receiver takes only its own power directly from the battery and just provides the signal to the servos.
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The Cyprus peanut scale twin engine F104 Today 00:28 #39

  • THE BLACKBIRD
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Thanks for that info Simon, pleased I had it right, so for just £3 extra per servo I can double the power
Just what I need
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