Engines

[brianyemail-nsrca at yahoo.com]

Isnt the Hacker setup turning in the 6-7000 rpm range on that prop?

Jerry Budd <jbudd at QNET.COM> wrote:>More rudder workload for the pilot?

I assume you're referring to adding rudder during pushes/pulls? 
Neither Tony's ePartner nor my E=MC3 require any. If your airplane 
needs rudder during pushes/pulls you either need to retrim it or you 
need a different plane.

>Lower tip speeds, less noise?

The electric (Hacker C50-14XL) isn't dramatically quieter in the air 
due to the gearbox noise it makes. I haven't calculated the tip 
speeds but I would expect them to be way down since one is almost 
never at full power in level flight, and on uplines the prop is 
loaded so the sound never really changes much. I have heard that the 
direct drive Plettenberg (sp?) used by Bernd Beschorner at the 
European Championships a few weeks ago was so quiet, it was "eerie".

>Having to create higher weight, longer, less stable fixed gear?

Same gear mounted lower in the fuselage (no tuned pipe/muffler to get 
in the road). Plenty of ground clearance with the 22-12 prop (over 
2").

>More expensive propellors?

I don't know for sure, I only used one (and it wasn't mine), but I 
think it costs about the same as the 17-12's I use on the Webra.

Thx, Jerry
-- 
___________
Jerry Budd
mailto:jbudd at qnet.com
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