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Old 06-23-2011 | 04:51 PM
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Auburn02
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Default RE: Flex header for MVVS/Evolution 58?

ORIGINAL: pe reivers

That's at least 6 questions, most of which will be answered if you read my web.
I've seen responses from you like this before. I suppose we should think twice before asking questions in the "Engine Manufacturers Direct Support Forum." No offense Pe, but many of the answers are not on your "web," or are not very easy to find. Frankly I'm not sure what unit of currency "Price €" represents, but if it is US dollars that will give me some of the information I need.

The ''Ø'' symbol is diameter.
This is what I assumed. This ties into my question about the length. Based on this picture ( http://www.mvvs.nl/MTW/Headers_files/Kruemme-VA-DB.jpg ) the diameter is not constant through the length of the header. It very much appears to get larger towards the end of the header, which is I assume where the diameter is 28mm. So if the header has to be cut to length to fit the airplane, would that not make the diameter at the outlet of the header less than 28mm?

There is no standard length! Standard for what?
I'm used to tuned pipes for glow engines that don't have a flange on the header or the pipe. The pipe can be cut and uses a slip-on coupler to connect the two. The canister and header I have both have flanges ( http://www.mvvs.nl/images/3202-s.jpg and http://mvvs.nl/images/3204-s.jpg ), with a coupler and a pair of springs. If the setup is too long, can one of the pieces be cut? I presume they can't because of the flanges on each piece but I don't know, and I can't find any documentation. There's very little information about this engine at all, and it just doesn't seem like many people use these engines, or at least there's not much discussion of them on these forums. That's my only complaint about this engine really, which is probably why they're not as popular as some others. People won't buy and use what they can't find any information about.

Adjusting the angle means in this case you can rotate the engine around it's longitudinal axis until parts line up nicely.
This I understand. Since I'm putting the engine in a round-cowled airplane, that may actually work out. I'll take a look at it when the airframe arrives in the next few days.

I located the shipping information I had requested on your page. That's 1 out of my 6 questions I was able to solve on my own. Thanks for what help you're willing to provide on the others.