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08-15-2018, 01:28 PM
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Join Date: May 2009
Location: Reedley, California
Posts: 85
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My concern would be the sealing of the oil access door to the top plenum. As the engine shakes around and the engine mounts sag, I would assume the sealing rubber would allow a small space to develop, and cooling air would be lost.
I also feel compelled to mention that on high compression IO-360's at least, cylinder temps in the 340's range and oil temps in the high 180's is easily obtained with stock Van's cowling and baffles.
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08-15-2018, 02:15 PM
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Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 2,597
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Quote:
Originally Posted by dwrichey
My concern would be the sealing of the oil access door to the top plenum. As the engine shakes around and the engine mounts sag, I would assume the sealing rubber would allow a small space to develop, and cooling air would be lost.
I also feel compelled to mention that on high compression IO-360's at least, cylinder temps in the 340's range and oil temps in the high 180's is easily obtained with stock Van's cowling and baffles.
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Here is how I did mine. The well seals around the engine dip stick tube and stays on the engine when you pull the plenum.
Carl

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08-15-2018, 05:50 PM
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Join Date: Nov 2010
Location: ____
Posts: 829
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Top motor mounts outside the plenum and baffles!
Carl, In the photos of your oil filler access, your plenum and aft face baffle stays in frot of the motor mounts. Any chance of a photo or two that shows a bit more detail on the aft vertical baffle and a side shot to show the hight of the plenum top / vertical baffles by the back 2 cylinders?
Anything you have is of interest.
Thanks!
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08-15-2018, 07:12 PM
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Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 2,597
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Quote:
Originally Posted by F1R
Carl, In the photos of your oil filler access, your plenum and aft face baffle stays in frot of the motor mounts. Any chance of a photo or two that shows a bit more detail on the aft vertical baffle and a side shot to show the hight of the plenum top / vertical baffles by the back 2 cylinders?
Anything you have is of interest.
Thanks!
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Some photos during fit up. Perhaps they show what you are interested in seeing. Note - I made the aluminum part of the plenum. Not too hard - just follow the handwritten instruction from James.
I ended up putting a 3/4" restrictor in each cabin heat SCAT hose as separate hoses was overkill, and just had the effect of bypassing engine cooling air to the bottom of the cowl. Even so, on the coldest days I just crack open the rear heat and leave the front heat off. If I was to do it over again I'd just have the one hose with a restrictor going to a Y, and then to the two heat muffs.
Carl

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08-15-2018, 07:18 PM
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Join Date: Mar 2018
Location: Antioch, Tennessee
Posts: 102
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WOW! This post is phenomenal. Love this data and details. AWESOME! Huge Thank you!
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08-15-2018, 08:06 PM
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Join Date: Nov 2010
Location: ____
Posts: 829
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Quote:
Originally Posted by ksdflying
WOW! This post is phenomenal. Love this data and details. AWESOME! Huge Thank you!
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+1
Thanks Carl, that is exactly what I wanted to see.
There is a lot of really great tech info and help that gets buried in time, and needs to be presented new for the benefit of new builders.
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08-16-2018, 09:13 AM
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Join Date: Dec 2009
Location: Montreal
Posts: 1,456
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Quote:
Originally Posted by Carl Froehlich
These rings measure about 4 3/4” ID, but James list them at 4 5/8” ID. Here is the link: http://www.jamesaircraft.com/?page_id=11
Note the 14” spinner. While I understand Van’s desire to standardize across kits, the stock 13” spinner is, in my opinion, out of proportion on an RV-10.
Carl

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wow - somebody knows their way around a sanding block. That's some awesome prep and paint work there. The sanding dust was obviously rinsed off with sweat! Look at the light reflections and how straight they are. Hope mine turns out even close to that. Respect.
__________________
Scott Black
Old school simple VFR RV 4, O-320, wood prop, MGL iEfis Lite
VAF dues 2020
Instagram @sblack2154
Last edited by sblack : 08-16-2018 at 09:16 AM.
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08-16-2018, 10:10 AM
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Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 2,597
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Quote:
Originally Posted by sblack
wow - somebody knows their way around a sanding block. That's some awesome prep and paint work there. The sanding dust was obviously rinsed off with sweat! Look at the light reflections and how straight they are. Hope mine turns out even close to that. Respect.
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I have to give credit to the quality of the James cowl. But - any RV-10 builder will tell you they cough up sanding dust long after first flight.
Painting the plane was much harder than I expected. While I tell builders to consider doing this themselves, I caveat with ?BUT HAVE HELP?.
Carl
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08-16-2018, 10:38 AM
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Join Date: Oct 2005
Location: 08A
Posts: 9,500
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Quote:
Originally Posted by Carl Froehlich
Have no clue on such reports. I run LOP 95% of the time. Cruise is 170+kts at 9.5-11.5 GPH depending on altitude. CHTs in cruise are below 380....... I did install louvers on the bottom of the cowl (not the Van?s stufff) to add some additional cooling.
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Carl, what is the typical mission climb...speed, mixture, power setting, and resulting temperatures?
What temperatures in an extended hot day WOT climb at 2700?
Can it fly at at 90 knots indefinitely? If so, how hot?
__________________
Dan Horton
RV-8 SS
Barrett IO-390
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08-16-2018, 11:23 AM
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Join Date: Jan 2010
Location: Destin
Posts: 1,543
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Can someone buy Dan H a 3d printer so he can start making inserts to test and continue his research?
Can we crowdfund that?
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