|Nov 19, 2012, 11:25 PM|
Jepe Pyranha Exhaust Size?
Question for anyone who has built and flown a Jepe Pyranha. I'm building a Jepe Pyranha from the glass fuse and wood wing/tail kit. The cut off foam cup that is used for the tail cone gives a tail pipe diameter of 47mm. The photo instructions don't show or state what the tail pipe exhaust diameter should be. 47mm seems a bit small for a 70mm fan (WeMoTec 480), but since the cup was already cut off in the kit am I safe to assume the 47mm diameter is correct? I'm using a Mega 16/15/3 motor on 4S LiPo.
|Nov 19, 2012, 11:45 PM|
Here's a 70mm shroud ID, with a motor tube OD of 31mm . Might help.
Exhaust Diameter (single outlet)
100% FSA 62.76145314
95% FSA 61.17229765
90% FSA 59.54074235
85% FSA 57.86320074
80% FSA 56.13555023
75% FSA 54.3530128
70% FSA 52.50999905
|Nov 20, 2012, 07:15 AM|
That is the correct diameter for the minifan on 4s. I would love to find a virgin jepe kit. Kevin Saunders added ailerons to his and it rolls much better.
|Nov 20, 2012, 07:22 AM|
Guess I'll split the difference and go with 53mm.
I already have the wing built and shaped, so not sure how I'd put ailerons in at this point. It's a very thin wing. One could use two separate servos, but it would be tricky to run the leads now that the ribs are already installed. Guess I'll just go with the tailerons for now.
Thanks for the help guys!
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