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09-14-2006, 10:03 AM
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Join Date: Mar 2005
Location: Calgary, Canada
Posts: 5,745
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New Eggenfellner Redrive
Eggenfellner released photos of their new 3rd gen redrive prototype a few days ago. It is due to be installed to start flight testing soon. http://www.eggenfellneraircraft.com/News.htm |
09-14-2006, 10:18 AM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,408
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looks beefy, but not enough detail in the photos------------obviously another part or two not shown, what drives the gear on the left, (rear side pic), and what is behhind the big snap ring inside the case??
Looks like maybe a pressure oil port in the front side pic---good idea.
More info would be nice.
Mike
Last edited by Mike S : 09-14-2006 at 10:19 AM.
Reason: spelling
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09-14-2006, 12:42 PM
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Join Date: Feb 2005
Location: Chesterfield, Missouri
Posts: 4,514
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Quote:
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Originally Posted by Mike S
looks beefy, but not enough detail in the photos------------obviously another part or two not shown, what drives the gear on the left, (rear side pic), and what is behhind the big snap ring inside the case??
Looks like maybe a pressure oil port in the front side pic---good idea.
More info would be nice.
Mike
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The new redrive is similar to the original 1.82.
I believe the dimensions are the same. The gears have been rearranged to provide approximately 2.0 ratio, a way to get more HP out of the engine and not send the prop tips through Mach one. 
dd |
09-18-2006, 02:23 PM
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Join Date: Jan 2005
Location: Central California
Posts: 388
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Quote:
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Originally Posted by David-aviator
The new redrive is similar to the original 1.82.
I believe the dimensions are the same. The gears have been rearranged to provide approximately 2.0 ratio, a way to get more HP out of the engine and not send the prop tips through Mach one.
dd |
David,
Those gears are considerably bigger than the original redrive.
Bill Jepson |
09-19-2006, 12:52 AM
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Join Date: Aug 2005
Location: Pasadena CA
Posts: 2,484
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Hydraulic CS... please???
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Stephen Samuelian, CFII, A&P IA, CTO
RV4 wing in Jig @ KPOC
RV7 emp built
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09-19-2006, 07:24 AM
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Join Date: Jul 2006
Posts: 55
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Quote:
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Originally Posted by rv6ejguy
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What was the reason for demise of Gen 1 redrive?
There appear to be several potential problem areas in the case design based on the photographs. These would be easily addressed with fillets and gussets, but it would be premature to comment without knowing the design specifications or load parameters. This may be a prototype rather than a final production unit.
Gears look plenty stout. Curious about the small spur gear on rear of output shaft
Not shown in the pictures: What type of dampener/isolator does Eggenfellner utilize?
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bumblebees can't fly
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09-19-2006, 07:47 AM
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Join Date: May 2005
Location: Rochester Hills, MI
Posts: 878
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Eggenfeller Redrive
The big driver for the new PSRU is higher gear ratio (2.01 vs. 1.86) to get more HP. Dampener: dual mass flywheel.
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Dennis Glaeser CFII
Rochester Hills, MI
RV-7A - Eggenfellner H6, GRT Sport ES, EIS4000, 300XL, SL30, TT Gemini, PMA6000, AK950L, GT320,
uAvionixEcho ADSB in/out with GRT Safe Fly GPS
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09-19-2006, 09:05 AM
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Join Date: Mar 2005
Location: Calgary, Canada
Posts: 5,745
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Quote:
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Originally Posted by bumblebee
What was the reason for demise of Gen 1 redrive?
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Different ratio and stronger for the EZ30 engines which are 250hp max instead of 165 for the EJ25. |
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