Counter-rotating props on a single engine?
06-02-2004, 10:42 AM
#26
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RE: Counter-rotating props... and PROBLEM W/PROP
Friends!
I have problem almost clouse to scubyfan...(project w/FLY PLATFORM).
I don`t have of experience in field RC Planes, but i have big experience as aviation engineer and inventor...
So, my problems are:
1.The second prop on my FP have to have:
a/ counter-rotation
b/ for 'tractor" prop pitch - conditional coll "negative" (tractor prop pittch -conditional coll 'positive")
c/ "tractor' pitch "negative" as far i know, don`t making.
d/ as rule blades of props making with unsymetrical profile, therefore it isn`t possible to use as pusher prop.
e/prop w/changing pitch, as minimum $105
2. Therefore my project under sword of Damocles....and lost money
3. Who have idea or recommends PLEASE
Thanks
I have problem almost clouse to scubyfan...(project w/FLY PLATFORM).
I don`t have of experience in field RC Planes, but i have big experience as aviation engineer and inventor...
So, my problems are:
1.The second prop on my FP have to have:
a/ counter-rotation
b/ for 'tractor" prop pitch - conditional coll "negative" (tractor prop pittch -conditional coll 'positive")
c/ "tractor' pitch "negative" as far i know, don`t making.
d/ as rule blades of props making with unsymetrical profile, therefore it isn`t possible to use as pusher prop.
e/prop w/changing pitch, as minimum $105
2. Therefore my project under sword of Damocles....and lost money
3. Who have idea or recommends PLEASE
Thanks
06-02-2004, 11:20 AM
#27
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RE: Counter-rotating props... and PROBLEM W/PROP
F1992,
Check out this thread. We did a lot of talking about C-R props here. Go to post #24 of this thread for more info on props.
http://www.rcuniverse.com/forum/m_14...tm.htm#1448339
BTW, what plane are you thinking of modeling?
Check out this thread. We did a lot of talking about C-R props here. Go to post #24 of this thread for more info on props.
http://www.rcuniverse.com/forum/m_14...tm.htm#1448339
BTW, what plane are you thinking of modeling?
06-02-2004, 06:58 PM
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RE: Counter-rotating props... and PROBLEM W/PROP
1. I don`t need to know full problem. I took only small part of it.
2. I told about my problems(see a/, b/ ....) and asked to help if who can do it.
3. I told that my problems almost close to problem of Scubyfan, wich he will to have w/prop (see a/, b/...)
It is all.
4. Project RC fly platfom (RC FP), as far i know, wasn`t made in during last 5-6 years. Next step working out and use profile ducted.
That making right now in field RC ducted fun is PARODY on it. Correct ducted gives +45-48 % Plus of THRUST.
2. I told about my problems(see a/, b/ ....) and asked to help if who can do it.
3. I told that my problems almost close to problem of Scubyfan, wich he will to have w/prop (see a/, b/...)
It is all.
4. Project RC fly platfom (RC FP), as far i know, wasn`t made in during last 5-6 years. Next step working out and use profile ducted.
That making right now in field RC ducted fun is PARODY on it. Correct ducted gives +45-48 % Plus of THRUST.
09-11-2006, 06:06 PM
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RE: Counter-rotating props on a single engine?
An FYI - I found that the design in the article by Bill Young was patented in March 9, 2004 ( Patent number 6702631 ) It is funny that the magazine article states a date of October 1988 with in it. I wonder if this was when the article was published in scale RC Modeler?
Link to patent below.
http://patft.uspto.gov/netacgi/nph-P...&RS=PN/6702631
Link to patent below.
http://patft.uspto.gov/netacgi/nph-P...&RS=PN/6702631
