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Old 05-19-2022, 09:35 PM
propflipper propflipper is offline
Join Date: Aug 2010
Location: Ca
Posts: 61
Default Vantage Composites Carbon Fiber Plenum

Has anyone out there installed or seen one installed? Unfortunately I do not have a link to a photo. But it is not a conventional plenum. It is two pieces that , apparently, fit over each bank of cylinders. It may be the bees knees , or it may be junk .

Thanks ,
Rv-4 wings, emp, fuse done
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Old 05-20-2022, 07:21 AM
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dpansier dpansier is offline
Join Date: Jan 2006
Location: Green Bay, WI (GRB)
Posts: 594

Could this be the photo?
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Don Pansier
Green Bay, WI (GRB)

Antennas for Experimental Aircraft
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Old 05-20-2022, 07:45 AM
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Toobuilder Toobuilder is offline
Join Date: Jul 2009
Location: Mojave
Posts: 4,966

I'd be interested to see how they achieve a leak free seal around the pushrod tubes and cylinder bases. It "looks" like there is no positive seal there. If there IS contact with the pushrod tubes, how do they ensure the tube itself is not preloaded with various levels of presurization? Pushrod tube seals dont like radial preload, in my experience.
WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.

Michael Robinson
Harmon Rocket II -SDS EFI
1940 Taylorcraft BL-65
1984 L39C - SOLD
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Old 05-20-2022, 01:48 PM
propflipper propflipper is offline
Join Date: Aug 2010
Location: Ca
Posts: 61

Thanks for the photo. Yes , that is it . It uses silicon baffle material to seal around the pushrod tubes. But it appears that the primary support for the piece is the area anchored to the cylinder head. The pressurized air in the baffle will be trying to rip it off. The seals will provide some resistance but I have to wonder it it end up riding in the inside of the cowl.
Rv-4 wings, emp, fuse done
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