Muncie Prelim results

[Dean Pappas]

Yup,
It sure is interesting!
Dave called me late last evening, to tell me how things ended up, after the prelims.
Needless to say, I am pleased and proud. Then I told him to hang up and get some sleep!
GEOMETRY FIRST!
		obviously, I am quite the cheerleader. 

The observation that the hacker setups have more GO than the outrunners is likely due to their lower "proper" operating RPM, and the bigger diameter prop, That improves the prop efficiency, and low speed thrust.
The effective KV on a 6.7:1 Hacker is either 186 RPM/V or 173 RPM/V, depending on whether it's a 13 or 14-turn winding. The AXI and Orbit 25 are at 250 RPM/V. That's why they swing 19" diameters, rather than 22".
The best KV, so far, for an outrunner is the Cyclon 160, at 205. Maybe an outrunner with fewer turns, and a higher KV, like 350, can be combined with a 2:1 belt reduction. Belts are quiet, but useless at the shaft RPM of a hacker. This combo could negate the inrunners slight electrical efficiency advantage, and the huge prop efficiency advantage. 


Dean Pappas
Sr. Design Engineer
Kodeos Communications
111 Corporate Blvd.
South Plainfield, N.J. 07080
(908) 222-7817 phone
(908) 222-2392 fax
d.pappas at kodeos.com


-----Original Message-----
From: discussion-request at nsrca.org
[mailto:discussion-request at nsrca.org]On Behalf Of Jason
Sent: Wednesday, July 20, 2005 7:26 PM
To: discussion at nsrca.org
Subject: RE: Muncie Prelim results


Just guessing, but I put some of the motors used...

-----Original Message-----
From: discussion-request at nsrca.org
[mailto:discussion-request at nsrca.org]On Behalf Of Adam G
Sent: Wednesday, July 20, 2005 3:13 PM
To: discussion at nsrca.org
Subject: Muncie Prelim results


FAI
Don S   3983		YS
Dave L  3959		Webra?
Quique S  3957	Hacker
Andrew J  3947	Hacker
Chip H    3937	Hacker
Tony F    3935	Hacker/Neu?
Troy N   3916		YS
   cutoff
Pete C  3874		Hacker
Michael H  3801	YS
Chad N   3798	Plettenburg	
Joey H   3744	Hacker?
James W  3734	?
Daniel L  3699	Axi
Adam G    3687	Plettenburg
Earl H   3628		YS
Bryan H  3592	YS
Bill H  3570		??
Eric H  3557		OS
Glen W  3534		YS
Mark A 3503
Ron B  3372
Frank K  3361
Lamar B  3202
Albert G (inc)
Stephen L (inc)
Dezso V (inc)
Kenny L 0
Trent B 0


Note that posting four 975's isn't enough to make the cut!

-Adam

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