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Bill Hempel 50%Edge540 - EVO300Mag.

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Bill Hempel 50%Edge540 - EVO300Mag.

Old 03-29-2007, 12:22 PM
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DKjens
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Default Bill Hempel 50%Edge540 - EVO300Mag.

I picked up one of Bill Hempel's 50%Edge540s at the AMA show in Ontario, CA in January. I have all servos and linkages mounted and all wires made and pulled in this plane. I am going with an EVO300Magnesium for power and there has been some delay in getting the engine, but it arrived yesterday, so I though I'd post a few pictures.
I don't have many pictures of the plane, just a couple of the canopy and pilot. The cowl is a one-piece cowl, so to be able to baffle this 4-cylinder engine correctly I split the cowl in two.

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Old 03-29-2007, 01:04 PM
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Default RE: Bill Hempel 50%Edge540 - EVO300Mag.

Good call on splitting the cowl. I'd sure like to meet the person that does your cutting. Nice job!!! You sure you have enough engine for that plane?

BTW, you just became a Wild Hare owner by proxy. Congratulations and welcome to the club.
Old 03-29-2007, 02:16 PM
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Default RE: Bill Hempel 50%Edge540 - EVO300Mag.

Silversurfer,
That would be I who split the cowl. I know how important it is to duct a four cylinder correct, wouldn't want to fry those two rear cylinders he he. I hope this engine will perform well, only time, props and numbers will tell.
Yes, I really like the quality of this airplane, the hinging is phenominal, I love the flams scheme, and I am thinking of getting a WildHare little sister for it he he.

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Old 03-29-2007, 02:29 PM
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Default RE: Bill Hempel 50%Edge540 - EVO300Mag.

wow, all I can do is drool, and drool some more.
Old 03-29-2007, 03:20 PM
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Default RE: Bill Hempel 50%Edge540 - EVO300Mag.

Hey, all it takes is money and a complete lack of fear
Old 03-29-2007, 04:12 PM
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Default RE: Bill Hempel 50%Edge540 - EVO300Mag.

wow can u say that is HUGE!
Old 03-29-2007, 09:05 PM
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Default RE: Bill Hempel 50%Edge540 - EVO300Mag.

I'm embarrassed to even ask, but how do you go about splitting a cowl?
Old 03-29-2007, 09:30 PM
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Default RE: Bill Hempel 50%Edge540 - EVO300Mag.

I want to know, too. I've tried it before and they didn't come out nearly as straight and clean.
Old 03-30-2007, 08:28 AM
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Default RE: Bill Hempel 50%Edge540 - EVO300Mag.

The once piece cowl of comp-arf 2.6 is a major hang up for me. If I could split it that'd be the best of worlds.

I was looking at the picture of this cowl and there are two line of bolts/screws at the split line. How come?
Old 03-30-2007, 10:49 AM
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Default RE: Bill Hempel 50%Edge540 - EVO300Mag.

Here are all the pictures of the progress of splitting the cowl, and here is how I did it.
1. Find out where to split it and run 2" wide blue painters tape on out side.
2. I wanted to reinforce the cowl at the split, so I cut a 2" wide piece of 1/32 light airplane light ply to Epoxy to the inside. I drilled the holes for the screws in the cowl on both sides of the line for two purposes, a. it helped keep this first strip of ply in place and against the cowl for better adhesian.
3. After the first pieces of ply had been fastened, I cut another piece, same size, this will be the lip. I held it in place and drilled through the predrilled holes into this lip and then removed, this would guarantee a perfect allignment after the split, that's the b purpose of two rows of screws.
4. I started splitting the cowl with a little Exacto saw, but it kept getting stuck, so I ended up using a cut off disk on my dremel, that worked pretty well.
5. After the split I cut out some blocks in light ply for the blin nuts and glued them to the backside of the upper row of holes in that second strip.
6. I then Epoxied the strip with the blind nuts to the bottom cowl, using the little screws to line it up perfectly and to hold it in place.

All in all I'm pretty happy with the result. It's not as nice as a factory two piece cowl, but it serves my purpose and from 10' away it will look fantastic .

Let me know if anything is unclear and you have any questions.
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Old 03-30-2007, 11:02 AM
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Default RE: Bill Hempel 50%Edge540 - EVO300Mag.

Thanks for the lesson on splitting a cowl. Looks easy enough. After you get it all bolted together on a final take a red magic marker and draw a line on the outside directly down the split and the cut will not show the white and camo the cut a bit. This will get it to look good at 5 feet. Awesome project, Buzz
Old 03-31-2007, 08:25 AM
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Default RE: Bill Hempel 50%Edge540 - EVO300Mag.

I must say that with Bill Hemple's name on this thing, I would have thought it would have came with a two piece cowl....It does look like an awsome plane. I am sure he had to cut a couple of corners to make it a marketable product.....without compromise I am sure.

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