nbawannab

have an A4 Skyray nd i would like to put a ducted fan unit on it....i need a motor the can put out up to 22,000 rpm's can anyone help thanks

Dr Kiwi

What size is the plane, what size is the EDF, what cell count, what is the recommended motor size.......

nbawannab

its a plane that has a 57" wing is 77" fuse nd the plans call 4 a O.S. .91 ducted fan engine nd Dynamx fan unit....i want 2 convert 2 electric nd since the rpm high end 4 the O.S. puts out that number in the previous post i figured i needed a electric that puts out the same

Dr Kiwi

I'd post over here: http://www.rcgroups.com/electric-duc...n-jet-talk-12/... the gurus will sort it out for you.

Quorneng

The OS 91 for ducted fans develops 3.7hp at 22000 rpm.
To match that power (3500W) you will need some serious electrics, rather more than just "what motor will I need?".

Unless you have quite some experience in this field I would aim for something that required a good bit less power.

nbawannab

i wanna thank you 4 ur help nd input nd i have several jets already in my hanger nd this 1 is just the next step up i only needed help cause fo the convertion issue but i will keep u informed of my progress

Hokie Flyer

Check out Xreme Power Systems.  They sell Dynamax fans already modofoed for electric so it'll pretty much be a drop-in replacement for your Dynamax/OS combo.  I recommend contacting them with the size and weight info on your jet and they can recommend a fan/motor/battery/esc combination.


Rob

http://www.xtremepowersystems.net/products.php?cat=33

nbawannab

now thats wat im talking bout....thanks a bunch Hokie...will let u know how it turns out