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  #11  
Old 03-17-2017, 10:44 AM
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taverroi taverroi is offline
 
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Location: Beaufort South Carolina
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Default Eggenfellner Subaru for sale

By the way if anybody out there wants to buy the Eggenfeller Engine or the cowling for it that came with the plane let me know.. it is for sale..Pick up at Sanderville GA ONLY.
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  #12  
Old 03-17-2017, 11:05 AM
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Looks pretty cool.

Just out of curiosity, what kind of performance did you get out of the Subaru, and with what prop? (max speed, RPM, fuel flow; cruise speed, RPM, fuel flow)

What performance do you expect with the UL? and again, what prop?

Thanks,
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  #13  
Old 03-17-2017, 11:58 AM
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taverroi taverroi is offline
 
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Quote:
Originally Posted by jcaplins View Post
Looks pretty cool.

Just out of curiosity, what kind of performance did you get out of the Subaru, and with what prop? (max speed, RPM, fuel flow; cruise speed, RPM, fuel flow)

What performance do you expect with the UL? and again, what prop?

Thanks,
I have no idea about Eggenfellner Engine, I havent flown this plane. It was baught with the engine installed and the prop already removed and sold by the previous owner.

As to the performance of the UL.

It is and will be the equivalent to the 180/200hp Lycoming. With the exception of it being 50lbs lighter, smother running, and a quieter operation engine.

Btw it is a 6 cylinder that is specifically designed to burn Mogas! Has dual electronic Ignitions and is FADEC controlled.
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  #14  
Old 03-17-2017, 01:01 PM
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DanH DanH is offline
 
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Quote:
Originally Posted by taverroi View Post
As to the performance of the UL.

It is and will be the equivalent to the 180/200hp Lycoming. With the exception of it being 50lbs lighter, smother running, and a quieter operation engine.
The 520is is rated at 3300 RPM, so propeller efficiency will be a large factor in any comparison. Other wild cards are cooling drag work, fineness ratio, and that 50 pounds. Should be an interesting comparison.

For sure it's smoother than any flat 4. Feels like an O-300 Continental, very pleasant vibes.
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  #15  
Old 03-17-2017, 01:13 PM
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Mike S Mike S is offline
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Location: Cameron Park Ca "o61"
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Quote:
Originally Posted by DanH View Post
The 520is is rated at 3300 RPM,
Been waiting for someone to point that out............

So, is the plan to put a prop on it that will let it wind up to 3300, or something that keeps it down in the 2700 range like we are used to??

If the later, what HP sacrifice is expected?

It doesnt appear that they are set up for a hydraulic constant speed prop. Electric C/S maybe?
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  #16  
Old 03-17-2017, 01:18 PM
scsmith scsmith is offline
 
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3300 rpm! wow!

Even a 68" prop at takeoff 3300 rpm has a tip mach no. of 0.89!

by comparison, a 72" prop at 2700 rpm has a tip mach no. of 0.77.

This is going to be one very noisy take-off configuration, and prop efficiency will likely be degraded by the shock losses, as well as the smaller diameter. So takeoff and initial climb performance are not going to be like a 200 hp Lycoming.

If you were to put a 72" prop on it and limit the RPM to 2700, it would be 165 hp (assuming a flat torque curve).
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  #17  
Old 03-17-2017, 01:28 PM
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They list several prop manufacturers on the UL page that it says have developed props for the UL engine, one of which is Whirlwind. Without knowing the specifics, I would have to give the benefit of the doubt to the prop manufacturer to design it with proper length to avoid high Mach losses on the tips and handle the 3300 rpm.
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  #18  
Old 03-17-2017, 03:44 PM
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Looking at the chart, it gives you around 177-178hp at 2700rpm. Looking forward to reading about this!
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  #19  
Old 03-17-2017, 04:29 PM
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DanH DanH is offline
 
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From the operating manual...

Maximum (for 5 minutes) : 200 hp @ 3300 Rpm
Maximum continuous power : 180 hp @ 2800 Rpm


...so if you think of it as a 180, and prop it as such, you should be close.

The charts show max torque centered on 2800 RPM.
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  #20  
Old 03-17-2017, 05:15 PM
Mlidzct Mlidzct is offline
 
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Location: Southington, Ct
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Default Subaru performance

Quote:
Originally Posted by jcaplins View Post
Looks pretty cool.

Just out of curiosity, what kind of performance did you get out of the Subaru, and with what prop? (max speed, RPM, fuel flow; cruise speed, RPM, fuel flow)

What performance do you expect with the UL? and again, what prop?

Thanks,


Looking good! Whats this FWF package going for?

I almost bought this airplane, for those interested in the subaru performance heres a link to a kitplanes article on this airplane.

https://subenews.deej.net/wiki/image...planes0509.pdf
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