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Old Jan 18, 2008, 04:26 PM
redtail is offline
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Question

Phase 3 F16 EDF-motor placement


Hi i have just bought a Phase 3 F16 and i have just read the instructions about the fan placement which depends on the weight of the lipo,is this nessary why cant you just move the battery back or forwards to get the correct C of G.or is there a reason for this that i am missing?
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Old Jan 18, 2008, 04:34 PM
CFisher1421 is offline
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Quote:
Originally Posted by redtail
Hi i have just bought a Phase 3 F16 and i have just read the instructions about the fan placement which depends on the weight of the lipo,is this nessary why cant you just move the battery back or forwards to get the correct C of G.or is there a reason for this that i am missing?

I think it's a matter of room...I've got the on/off switch for the JETI mounted in the cockpit, wires galore and Rx...my fat fingers can barely move as it is so sliding the batt isn't gonna happen...
Old Jan 18, 2008, 04:47 PM
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with the stock setup, i always had it at the ledge and it balanced fine with a 3s 2100 pack...
Old Jan 18, 2008, 05:10 PM
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yeah if the motor is in the right place and your batt has room for fwd and aft movement that would be the best set up ....you may in the future put a different motor and run 4s batt.ck the up grade thread for ideas on place ment
Old Jan 19, 2008, 01:40 PM
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Thanks guys , i will see how much room i have with when i put the radio gear in before i decide if i should move the motor-i'm using the stock set up.
Old Jan 20, 2008, 11:04 PM
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Is there a con invloved with moving the motor back when using larger packs?
Old Jan 21, 2008, 08:40 AM
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I was also curious about this ... I'll be using DN Power 3S 2150Mah 15c lipos, which weigh in at 159g, as well as Loong Max 3S 2250Mah15C and 20C lipos, which weigh in at 164g and 186g, respectively.

I was looking at moving the motor back the recommended distance, but I wasn't sure if I was supposed to move the front edge of the fan back 40mm from the molded lip, or the back edge 40mm back from the molded lip (figured it was the front, but wasn't 100% positive). If you do this, it seems like the fan ducting extends too far out the back of the plane for the exhaust cone to fit - do you need to trim the ducting after you've got the fuse glued together in this case?

With an AR6100E receiver, I ought to have a decent bit of room up front for moving the battery around, but I don't want to end up in a situation where I need to move the battery forward to balance it and run out of space ... moving it backwards isn't as big of an issue, but there's not much room to hog out more foam in the front if it's tail heavy.
Old Jan 21, 2008, 09:37 AM
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i believe its the front edge there talking about. trim the exhust tube flush with the aft end of cone.
Old Jan 21, 2008, 11:36 AM
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Thanks, AS. I didn't see any mention in the instructions about trimming it when I read through them, though I admittedly didn't read all the little tips sections when I pre-read the manual before starting the build.

I think I may just go 20mm back instead of 40mm and seeing how it balances.


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