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-   -   RV-4 With Automobile engine ground run up (https://vansairforce.net/community/showthread.php?t=129681)

maxelrad 09-16-2015 03:46 PM

RV-4 With Automobile engine ground run up
 
Take a look!

https://www.youtube.com/watch?v=5cp9jg9NNx0

n82rb 09-16-2015 04:51 PM

interesting, wonder what he has planned for the cowl. I might suggest that next time use a set of chocks and tie the tail down.

bob burns
N82RB RV-4

BillL 09-16-2015 05:22 PM

At first glance, this looks like a good engine match for the RV4. Hopefully we will hear/see more about this installation. It appears to sit with heads on top, assuming that box on the front is the drive unit. Also, wonder if it retains the factory ECU with all the associated benefits like timing and knock control. So many questions!

blueflyer 09-16-2015 06:15 PM

I don't know how this guy expects to complete a test flight if he cant keep his emotions in any better check than what he did during that ground run....:rolleyes::rolleyes:

rv6ejguy 09-16-2015 07:37 PM

Quote:

Originally Posted by BillL (Post 1014443)
At first glance, this looks like a good engine match for the RV4. Hopefully we will hear/see more about this installation. It appears to sit with heads on top, assuming that box on the front is the drive unit. Also, wonder if it retains the factory ECU with all the associated benefits like timing and knock control. So many questions!

Caption says Megasquirt ECU. The cowling design will be interesting to see. This is an inline four, hence the need for the long belt drive to get the thrust line close to stock for prop clearance. Around 145hp depending on version. Hope we can learn some more and hear how it works.

Infidel 09-16-2015 07:52 PM

I can picture it now. That is going to be one ugly cowl! Maybe it was the camera angle but the prop/ ground clearance looks close.

Mel 09-16-2015 08:06 PM

Quote:

Originally Posted by n82rb (Post 1014437)
I might suggest that next time use a set of chocks and tie the tail down.

Along with the fact that I never saw even a smidgen of "UP" elevator.
Even when the tail began to get light, I saw neutral elevator at best.

cguarino 09-16-2015 08:13 PM

made me nervous
 
A little up elevator would make me feel better.

maxelrad 09-17-2015 04:40 AM

I didn't use the factory ECU as it requires a code to operate from the body control computer. Custom tuning with the Microsquirt better matches the aircraft reqirements also. My cowl is complete - will show it in a later post. It appears smewhat ungainly.
Took six months to fabricate from scratch s-glass over a wood and plaster buck.
Yes - the box up front is the PSRU - cog belt driven.

maxelrad 09-17-2015 04:51 AM

photo of cowl
 
see it here

https://photos.google.com/photo/AF1Q...PrO4T56kpB3kdC


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