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

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

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

Hydraulic CS... please???

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?

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.

Different ratio and stronger for the EZ30 engines which are 250hp max instead of 165 for the EJ25.