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Re: [Spridgets] Illumination needed-Straight cut vs. Helical Gears

To: abcoz@hky.com
Subject: Re: [Spridgets] Illumination needed-Straight cut vs. Helical Gears
From: "Mark Haynes" <haynes386@netzero.net>
Date: Wed, 22 Feb 2012 15:22:13 GMT
Yes Bud,
but only if you are putting the gears into a specially designed case, such as
one for ALMS or such. The minor reduction in power output (Helical gears ARE
95% efficient) doesn't necessarily outweigh the potential life issues (you
can't win if you don't finish). Most Spridget racers (SCCA and Vintage) are
restricted to using the factory tranny case, so the weight issue is NA.
In reply to Bob Walker's statement about more favorable ratios- If you're that
serious, gears can be hobbed to any ratio, I've done it-how much money do you
have, how fast do you want to go? that's no reason in and of itself.

Putting my fire suit on!

Mark Haynes
It only goes one way-Pay it Forward

---------- Original Message ----------
From: "Bud Osbourne" <abcoz@hky.com>
To: <dwoerpel@wi.net>, "'Kevin Valentine'" <kevinv1275@gmail.com>
Cc: <spridgets@autox.team.net>, "'Mark Haynes'" <haynes386@netzero.net>
Subject: RE: [Spridgets] Illumination needed-Straight cut vs. Helical Gears
Date: Wed, 22 Feb 2012 08:28:49 -0500

Interesting, but incomplete.  If you connect the dots, you quickly
understand that that increased thrust load also absorbs more power.  Coupled
with the implied extra weight of the transmission case for the helically cut
gears, you have incentive for using a transmission with straight-cut gears.

Bud Osbourne

-----Original Message-----
From: spridgets-bounces@autox.team.net
[mailto:spridgets-bounces@autox.team.net] On Behalf Of dwoerpel@wi.net
Sent: Tuesday, February 21, 2012 11:44 PM
To: Kevin Valentine
Cc: spridgets@autox.team.net; Mark Haynes
Subject: Re: [Spridgets] Illumination needed-Straight cut vs Helical Gears

Ah, very enlightening!  Thanks Kevin.
Dave W.

> Mark,
> It's explained very well here;
> http://automotivethinker.com/transmission/straight-cut-gears-vs-helica
> l/
> Kevin V.
> Tuscarora, Pa

57 Year Old Looks 27
Local Woman Reveals Wrinkle Secret That Has Doctors Angry.


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