Homemade Wind Machine
by Hans Sitte
(San Jose CA)
Dear rc flight expert,
I have been requested to build two wind sources for wind cart experiments. This experiment will be used by a physics instructor who will take it to different schools for visual experimentaion.
These wind sources will be shrouded to be safe for the operators and are stationary at both ends of a "wind tunnel" with the wind cart between them.
I have a 7 cell NiMH battery and I would like to use a similar battery for these wind sources.
1) With that information do I need a gearbox to drive a 10" prop to get an approximate 5, or better, mph wind?
2) What size/type/style (# of turns or scale size, brushless, in or outrunner) of motor do you recommend?
3) What about an ESC?
4) Do I need a propsaver?
5) The cost target per source should be ~$200, not including batteries.
I do not know who else can answer these question and I know that I have a lot of questions but I have little experience with flight RC and if you can suggest a drive system I would appreciate it.
Thank you in advance for any help you can supply.