Today's Message Index:
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1. 09:53 AM - Re: CB-1002-H Governor Bracket Installation Photos...? (Matt Dralle)
2. 12:04 PM - Front Mounted Governor vs. Rear Mounted Governor... (Matt Dralle)
3. 08:03 PM - Painting The Baffling... (Matt Dralle)
Message 1
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| Subject: | Re: CB-1002-H Governor Bracket Installation Photos...? |
Thank you for the info, Bill.
Looks like the McCauley governor is over 1" taller than the PCU5000. That would
explain why I've been having issues with interference with the intake. I came
up with a bracket yesterday after 5 tries that seems to work pretty well.
On the good side, I'm now getting full throw on the governor and there is no binding
whatsoever. In fact, its so free that the spring always pulls it to High
RPM setting if I don't have the drag-lock on the throttle quadrant at least
a little tight. Both of these are improvements over the Van's bracket. On the
downside, the pushrod is just barely clearing the intake's upper inboard corner.
I haven't actually mounted the intake yet, so its still too soon to tell
the full impact.
Speaking of the intake, when I push it into place, its bumping into the main mounting
screw busing on the alternator. I've got the standard 60a internally regulated
unit from Van's. I'm estimating that I'm going to have to put about
a 1/4" deep "channel" into the top right side of the fiberglass intake to get
it to fit up onto the throttle body. I wonder what impact that will have on the
designed "airflow" of the intake...? There is also a strut that came with
the alternator that goes from the front of the alternator bracket to a mounting
ear on the starter. There's no way this will fit on with the fiberglass intake
in place. I wonder if I can leave it off? I've got the Skytec Inline starter
and I already had to cut one of the unused lower mounting ears off of it
because it completely interfered with the intake.
Man, there sure are a lot of "issues" getting the front part of this IO-390 installed...
Is it really that much different in the front than the IO-360? I've
read a couple of places where the IO-390 is "a bolt in replacement for the IO-360".
Well, yeah, it bolts on, but the front mounted governor and slightly
different placement of the alternator and starter make for a lot of custom modifications.
Buyer beware.
I'll post some pictures of my governor bracket later today if I decide its really
going to work.
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com
FWF Baffling and Intake...
At 06:46 PM 9/19/2009 Saturday, you wrote:
>Hello Matt,
>
>
>
>The dimensions are indicated in the in the link below. It took three attempts
to get the correct prop governor drive ratio and you can certainly use my name
to get specs from the latest unit they shipped to me -- excellent folks to deal
with. I purchased the governor from Aero Technoligies for $1235...will provide
a scanned invoice detailing P/N & S/N, if interested. A friend with a recently
first-light RV-7A (BPE 390) purchased a governor from same source (& price)
-- no issues whatsoever using.
>
><http://www.pcu5000.com/pcu5000x_spec.pdf>http://www.pcu5000.com/pcu5000x_spec.pdf
>
>As for using stainless steel bracket...it was the strongest with the least weight
and no drawing was produced. It was trial & error method when it came to deciding
where to drill the holes -- will explain further should you wish to discuss...913-271-0988.
>
>I hope you found the info on Marc's site helpfull as he really hopes that the
info will be helpful to other 390 owners. BTW, I really love this engine...very
smooth, powerful and FAST. You will be very happy. Allen has several hours in
my plane and hopefully provided his experience.
>
>Have a great weekend,
>
>Bill
>
>
>
>
>----- Original Message -----
>From: "Matt Dralle" <dralle@matronics.com>
>To: rv7-list@matronics.com
>Sent: Saturday, September 19, 2009 12:24:29 PM GMT -06:00 US/Canada Central
>Subject: RV7-List: Re: CB-1002-H Governor Bracket Installation Photos...?
>
>--> RV7-List message posted by: "Matt Dralle" <dralle@matronics.com>
>
>Hi Bill,
>
>Do you have a 3D drawing of the bracket you made? Why did you choose steel instead
of aluminum?
>
>Your governor looks a lot shorter than the McCauley. Do you have a 3D drawing
of it, by chance? What is the exact model number? What's the height from the
boss to the control arm? Where'd you get it from?
>
>Thanks!
>
>Matt Dralle
>RV-8 #82880 N998RV
>http://www.mattsrv8.com
>
>
>wgill10(at)comcast.net wrote:
>> Hello Matt,
>>
>> I didn't use this bracket...made my own. If interested, Go to Marc's site (www.IO-390.com (http://www.IO-390.com)) and see what I did for the governor bracket and front baffles for the front mounted governor pad. Additionally, I could send some higher resolution pictures...just let me know. I have NEVER had any high temp issues...a very fast airplane as well.
>>
>> FAB Air box: http://www.io-390.com/IO-390.com/AFP_Servo.html (http://www.io-390.com/IO-390.com/AFP_Servo.html)
>> Prop Gov Cable/bracket: http://www.io-390.com/IO-390.com/Prop_Gov.html (http://www.io-390.com/IO-390.com/Prop_Gov.html)
>> Baffles: http://www.io-390.com/IO-390.com/Baffles_2.html (http://www.io-390.com/IO-390.com/Baffles_2.html)
>>
>> Good luck,
>>
>> Bill
>> RV-7 N151WP
>> BPE IO-390 w/AFP
>>
>>
>> ---
Message 2
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| Subject: | Front Mounted Governor vs. Rear Mounted Governor... |
I just discovered something very interesting. The gear ratio is different between
a Front mounted governor and a Rear mounted governor - .947 to 1 (front) vs.
.866 to 1 (rear). So that means that the McCauley governor that I have that
I originally purchased for use with and O-360 won't even work with the IO-390.
This page from the PCU5000 web site is very informative:
http://www.pcu5000.com/pcu5000x.htm
It details the various ratios and what not.
I also found a PDF on the dimensions of the MT governor that Van's sells:
http://www.mt-propeller.com/pdf/manuals/e-1048.pdf
This MT governor is also 1" shorter than the McCauley governor similar to the PCU5000:
http://www.pcu5000.com/pcu5000x_spec.pdf
In this picture of the PCU5000:
http://www.pcu5000.com/index_i/hmpg_pic.gif
the PCU5000 shows an auxiliary control arm that might be very helpful in pushing
the control cable out of the way of the fiberglass intake. Although, I think
that just moving the control arm in by 1" compared to the McCauley is going
to be plenty.
At any rate, I've ordered a PCU5000X number "P-520-029/A-947" for my RV-8/IO-390
combination so hopefully I can move forward on this project...
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com
Engine Baffling...
Message 3
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| Subject: | Painting The Baffling... |
Dear Listers,
I had been planning on black anodizing the various engine baffling pieces in keeping
with my black-n-chrome theme under the hood. But I'm noticing that the
pieces are getting pretty scratched up during all of this extra fitting that's
necessary for the IO-390. Since the pieces can't be run through a surfacer first
because of the bends, I'm rethinking how good anodizing is really going to
look.
I know we're not suppose to power coat the 2024-T3 because the curing heat required
can un-T3 the 2024, but does it really matter for the baffling? Its not
really structural, per say. And if power coating is alright, what effects will
the engine compartment heat have on the power coating? There's probably a high-temp
power coat, but it would likely require a higher curing temp, and that
get's us back to the first sentence of this paragraph... Power coating the
baffling would definitely look pretty cool.
Has anyone ever chromed their baffling? That would look super cool. Can you chrome
2024-T3? How much would that cost compared to power coating?
Am I fussing too much under the hood? ;-)
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com
FWF Baffling, Intake, and Governor...
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