Today's Message Index:
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1. 09:56 AM - Re: RV8-List Digest: 3 Msgs - 04/03/11 (japhillipsga@aol.com)
2. 07:27 PM - Re: Canopy Skirt Buzz (Speedy11@aol.com)
3. 07:49 PM - Re: Canopy Skirt Buzz / hot and cold cylinders (Robin Marks)
Message 1
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Subject: | Re: RV8-List Digest: 3 Msgs - 04/03/11 |
Jim, this looks like about 90% of my clients!!?? Best regards, Bill
-----Original Message-----
From: RV8-List Digest Server <rv8-list@matronics.com>
Sent: Mon, Apr 4, 2011 3:08 am
Subject: RV8-List Digest: 3 Msgs - 04/03/11
*
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RV8-List Digest Archive
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Total Messages Posted Sun 04/03/11: 3
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oday's Message Index:
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1. 11:49 AM - Re: Canopy Skirt Buzz... (Follow Up) (Pete Cowper)
2. 01:24 PM - Re: Re: Canopy Skirt Buzz... (Follow Up) (Robin Marks)
3. 03:52 PM - gear tower mod (Stan Loer)
_______________________________ Message 1 _______________________________
______
ime: 11:49:07 AM PST US
rom: "Pete Cowper" <petercowper@att.net>
ubject: RV8-List: RE: Canopy Skirt Buzz... (Follow Up)
ren't those fancy noise cancelling headsets supposed to cancel out pesky
oises like your canopy buzzing?!!
ete Cowper
V8 #81139
isalia Municipal Airport Hanger B-5
_______________________________ Message 2 _______________________________
______
ime: 01:24:26 PM PST US
rom: Robin Marks <Robin@PaintTheWeb.com>
ubject: RE: RV8-List: RE: Canopy Skirt Buzz... (Follow Up)
n some cases the buzzing on our (well made) canopy can be louder than our
00 Hp engine.
Robin
o Not Archive
-----Original Message-----
rom: owner-rv8-list-server@matronics.com
mailto:owner-rv8-list-server@matronics.com] On Behalf Of Pete Cowper
ent: Sunday, April 03, 2011 11:46 AM
ubject: RV8-List: RE: Canopy Skirt Buzz... (Follow Up)
ren't those fancy noise cancelling headsets supposed to cancel out pesky
oises like your canopy buzzing?!!
ete Cowper
V8 #81139
isalia Municipal Airport Hanger B-5
_______________________________ Message 3 _______________________________
______
ime: 03:52:30 PM PST US
rom: "Stan Loer" <stazel@cpros.com>
ubject: RV8-List: gear tower mod
I'm planning to open up the gear towers (only connecting the center and
ower lightening holes), but am considering a different approach to
estoring the lost strength from removing the web than I have seen on
ther builder's web sites. Rather than completely plating over the open
ole, how about an H-shaped plate that would essentially restore the
ut-out web? The cross-bar section would incorporate the radii of the
id and lower lightening holes with the vertical legs extending to
pprox. mid-point of the holes. I'd probably use .063 mat'l for a
ittle extra stiffness with bolt spacing about 150% of existing rivet
pacing. Haven't worked out actual dimensions yet; just a concept so
ar. The primary benefit would be eliminating the multitude of nut
lates. Also, the lightening holes would still be there for access to
nything that might not need the larger opening.
Stan Loer
V8 QB
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Message 2
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Subject: | Re: Canopy Skirt Buzz |
Robin,
That is surprising that the canopy buzz is so loud. Is it buzzing on the
sides? I've had no similar problem that I'm aware of, but I modified the S
curve on mine.
Since it is buzzing so loudly, it must be vibrating. I wonder if that is
creating fatigue in the fiberglass?
Are your oil temps still doing well?
Stan Sutterfield
In a message dated 4/4/2011 3:08:51 A.M. Eastern Daylight Time,
rv8-list@matronics.com writes:
In some cases the buzzing on our (well made) canopy can be louder than our
200 Hp engine.
Message 3
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Subject: | Re: Canopy Skirt Buzz / hot and cold cylinders |
The buzzing is very random And usually in a narrow speed range. We have done
nothing to prevent the buzzing... Yet. It is definitely skirt vibration. I
am not worried about it really.
Temps are better with the new larger fiberglass oil cooler plenum. Not ideal
but better. We are seeing 195 in low altitude high power cruse. We prefer
180 and a valve to control the temps mostly because I live in CA and summer
temps can get triple digits. I expect at altitude we will see 180 or lower
depending on conditions.
Unfortunately we still have a HOT #3 and a cool #4 with 70-80 degrees
separating them. 310 on #4 and 390 on #3. Ugh. 1&2 are 330-340. I know it is
common to have temp issues on #3 because the back of the cylinder is often
blocked by the rear baffle / plenum and little if any air goes down the back
side of 3. We have read about some builders placing a spacer back there to
aid in airflow.
We ran the fuel flow test and found nothing unusual. I ordered a beaker set
to be more precise. The FI system is an older Bendix with older injectors
and no restrictors. I had a set of new injectors that I pulled off my 10 so
we will be adding those this week. They allow us to swap out restrictors to
balance the cylinders for flying LOP. Hopefully it will help the temps too.
Basically I really need to get #3 cooler. The rest should be minor
adjustments.
Thanks for following up with me,
Robin
Sent from my iPad2.
On Apr 4, 2011, at 7:21 PM, Speedy11@aol.com wrote:
Robin,
That is surprising that the canopy buzz is so loud. Is it buzzing on the
sides? I've had no similar problem that I'm aware of, but I modified the S
curve on mine.
Since it is buzzing so loudly, it must be vibrating. I wonder if that is
creating fatigue in the fiberglass?
Are your oil temps still doing well?
Stan Sutterfield
In a message dated 4/4/2011 3:08:51 A.M. Eastern Daylight Time,
rv8-list@matronics.com writes:
In some cases the buzzing on our (well made) canopy can be louder than our
200 Hp engine.
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