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    New member with crazy design...

    Hi PeetPilot, It been a long time since your last post so I hope you are still around and working on your design. I was serching around and found your post and felt compelled to comment.. I like the original thinking of your design. As I also believe, why make the same ol' configuration as...
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    New Group Started Re: CR Props

    Some of you may have been following or participating in the debate regarding Contra-rotating Gearboxes and Props. Others have expressed a desire to aquire one. I have started a group to brainstrom of ways of getting some manufactured that meet our requirements. The group is not to further the...
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    Contra-rotating PSRU

    Crytes, I agree completely that many engines already have a built in PRSU (simple gear to gear) and if they went to a planetary type they could add to contra-rotation capability. Imagine if CR props were an "option" built into every engine with a PRSU. How many would use that option? It is...
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    Counter Rotating Propellers

    It is true that the Cotra-rotation application has been used on high powered aircraft, mainly for the reasons stated by Riggerrob. However, there is a trend to use them on the lower powered vehicles such ultralights, powered Trikes and powered parachutes as well, vehicles which one would think...
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    Counter Rotating Propellers

    Hello ebonheart_2, As another poster has mentioned, there is a gearbox from SunFlight which does gear reduction as well as contra-rotation. Unfortunately, they are of a pusher configuration only, and I'm presuming you need a tractor type. I have contacted him (Sunflight) and asked if he...
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    Hiller Flying Plateform Planning, All Ideas Highly Appreciated, Aircraft Noob

    Re: We need a low cost contra-rotating alternative! Regarding the need for a simple CR Gearbox, I Whole Heartedly Agree. I have been searching for just such a unit for some time now to no avail. I have approached at least two manufacturers who produce similar devices but neither was interested...
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