Been seeing more and more contra rotating propellers in the radio controlled world and was wondering how your full sized project was coming along.... was also wondering if you might share some pics of the gearbox scheme you used to achieve the contra rotation...
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Thread: Flying Project
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02-15-2012, 11:23 AM #101
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Contra Rotating Propellers
The more you know, The better you know, How little you know............................. (Old Estonian Saying)
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02-15-2012, 09:08 PM #102
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Nick
Miller 252 Mig
Miller Cricket XL
Millermatic 150 Mig
Miller Syncrowave 200 Tig
2-O/A outfits
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Jet 7x12 horz/vert band saw
DeWalt Multi Cutter metal saw
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www.youtube.com/watch?v=jTu7wicVCmQ
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and check out some of my ironwork and other stuff
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02-16-2012, 06:34 PM #103
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OK.... that spider gear setup is a simple elegant solution... Thanks!!
The mast does look a little lightweight.... know the loading is way different.. but the ones on the Bell Jetrangers and Hughes 500's that I am used to are massive by comparison..... how did you calculate the loading on it??The more you know, The better you know, How little you know............................. (Old Estonian Saying)
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02-17-2012, 08:41 AM #104
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When you say mast, what are you referring to?...The 2" square mast as I call it or the 1" rotor shaft. No calcs were done. Just looked at a lot of other projects and came up with this.
Nick
Miller 252 Mig
Miller Cricket XL
Millermatic 150 Mig
Miller Syncrowave 200 Tig
2-O/A outfits
Jet Lathe and Mill
Jet 7x12 horz/vert band saw
DeWalt Multi Cutter metal saw
Century 50 Amp Plasma Cutter
20 ton electric/hydraulic vertical press
Propane Forge
60" X 60" router/plasma table
www.youtube.com/watch?v=jTu7wicVCmQ
Vist my site: www.nixstuff.com
and check out some of my ironwork and other stuff
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02-18-2012, 10:16 AM #105
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Monte
Originally Posted by monte55
was referring to the "Rotor Mast"
You may find it useful to refer to Wayne Johnson's text "Helicopter Theory" it is pretty much the standard reference in rotary wing design...
"Monumental text offers comprehensive, detailed coverage of every aspect of theory and design: elements of vertical flight, forward flight, performance, mathematics of rotating systems, rotary wing dynamics and aerodynamics, aeroelasticity, stability and control, more. Essential reading for those interested in design and development of vertical-flight aircraft. 189 illustrations. 1089 pages
1980 edition."
http://books.google.com/books?id=SgZheyNeXJIC
there are lots of used copies available at reasonable prices...The more you know, The better you know, How little you know............................. (Old Estonian Saying)
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