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B&C alternator clearance

 
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brooksrv6(at)hotmail.com
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PostPosted: Tue Jan 24, 2006 2:14 pm    Post subject: B&C alternator clearance Reply with quote

I currently have Vans 35amp alt. With a Gates 7355 belt (36-1/4") on an
O-360 C/S. Somewhere between 3-3.5 g's the pulley makes contact with lower
cowl.
I tried the next size shorter belt 7350 (35-5/8") but it's too tight and
holds the alternator against the Stainless oil line from the governor. I
would buy a B&C L40 if I thought it would give more clearance, but would
rather save the money if it wouldn't fit with the shorter belt.
Does anyone have a B&C L40 on a O-360 with a constant speed prop, and using
a 7350 (35-5/8") (890mm) belt? If I know this combination works I'll order
the B&C.

Chris Brooks
RV6


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klwerner(at)comcast.net
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PostPosted: Tue Jan 24, 2006 5:28 pm    Post subject: B&C alternator clearance Reply with quote

Chris,
I don't have an answer for you on the L40, but here is something else you may consider. Get yourself a "slightly" bigger diameter pulley for your current alternator, which will do two things for you: 1. Get the ALT closer to the engine while still using the 7355 belt you have on it right now, and 2. slow down your ALT.-RPM a little bit! Does that make sense to anyone else ???

Good Luck to you (without spending to much money)
---


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Vanremog(at)aol.com
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PostPosted: Tue Jan 24, 2006 8:14 pm    Post subject: B&C alternator clearance Reply with quote

In a message dated 1/24/2006 2:16:26 P.M. Pacific Standard Time,
brooksrv6(at)hotmail.com writes:

Does anyone have a B&C L40 on a O-360 with a constant speed prop, and using
a 7350 (35-5/8") (890mm) belt? If I know this combination works I'll order
the B&C.
======================================

I run the B&C L60 alternator with the Gates 7360 belt fine on mine since day
one, if it helps you to decide.

GV (RV-6A N1GV O-360-A1A, C/S, Flying 771hrs, Silicon Valley, CA)


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brooksrv6(at)hotmail.com
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PostPosted: Wed Jan 25, 2006 6:53 am    Post subject: B&C alternator clearance Reply with quote

Konrad, that makes since to me. My algebra is probably flawed but I
calculated that if I went with a 3-1/4" pulley instead of the 2-3/4" it
would move the alt. .4" closer to the engine but only gain 1/8" of pulley
clearance. That .4" puts me back into the prop governor line.

Chris


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klwerner(at)comcast.net
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PostPosted: Wed Jan 25, 2006 7:44 am    Post subject: B&C alternator clearance Reply with quote

Chris,
What is your thought in regards to a small clearance bump fiberglassed into the cowl, versus buying a new expensive alternator?
After all it is not very much additional clearance that you are looking for? Or perhaps you could stay away from the 3+G Pulls Smile
---


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deanpichon(at)msn.com
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PostPosted: Wed Jan 25, 2006 9:55 am    Post subject: B&C alternator clearance Reply with quote

I have a similar set-up to yours with the 40 amp B&C alternator, the same
engine, and a constant speed prop. I found that my alterantor hit the cowl
on the first flight. I used a slightly shorter (Gates) belt and modified
the tensioning arm. Since the mod I have not had a problem in over 300
hours. 'Hope this helps,

Dean Pichon
RV-4
Bolton, MA

----Original Message Follows----
From: "Chris Brooks" <brooksrv6(at)hotmail.com>
Reply-To: rv-list(at)matronics.com
To: rv-list(at)matronics.com
Subject: B&C alternator clearance
Date: Tue, 24 Jan 2006 16:13:28 -0600



I currently have Vans 35amp alt. With a Gates 7355 belt (36-1/4") on an
O-360 C/S. Somewhere between 3-3.5 g's the pulley makes contact with lower
cowl.
I tried the next size shorter belt 7350 (35-5/8") but it's too tight and
holds the alternator against the Stainless oil line from the governor. I
would buy a B&C L40 if I thought it would give more clearance, but would
rather save the money if it wouldn't fit with the shorter belt.
Does anyone have a B&C L40 on a O-360 with a constant speed prop, and using
a 7350 (35-5/8") (890mm) belt? If I know this combination works I'll order
the B&C.

Chris Brooks
RV6
On the road to retirement? Check out MSN Life Events for advice on how to
get there! http://lifeevents.msn.com/category.aspx?cid=Retirement


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bhester(at)hopkinsville.n
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PostPosted: Wed Jan 25, 2006 5:37 pm    Post subject: B&C alternator clearance Reply with quote

Chris, go here and see if this helps, he's using a NAPA 7355 belt:
http://our-rv7a.com/engine/engine110703.htm

Surfing the Web from Hopkinsville, KY
Visit my web site at: http://www.geocities.com/hester-hoptown/RVSite/
RV7A Slowbuild wings-QB Fuse-XPO360 engine Smile

Chris Brooks wrote:

Quote:


Konrad, that makes since to me. My algebra is probably flawed but I
calculated that if I went with a 3-1/4" pulley instead of the 2-3/4" it
would move the alt. .4" closer to the engine but only gain 1/8" of pulley
clearance. That .4" puts me back into the prop governor line.

Chris









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kboatright1(at)comcast.ne
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PostPosted: Wed Jan 25, 2006 5:50 pm    Post subject: B&C alternator clearance Reply with quote

If you have a belt length problem, take your current belt to the local auto
parts store. They will have a gauge to measure the length of your belt. Once
you know that, you can choose another one that is the appropriate amount
shorter.

I found a little pulley scrubbing on my -'6's cowl last summer, took the old
belt in and got a replacement that was a centimeter or two shorter. Made all
the difference in the world.

KB


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martin(at)gbonline.com
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PostPosted: Thu Jan 26, 2006 6:57 pm    Post subject: B&C alternator clearance Reply with quote

Chris,
I have the B&C alternator and have over 1200 hours with it. It works
perfect, no problem with clearance.
Dick Martin
RV8 N233M
the fast one
---


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