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<HEAD><TITLE> For Takeoff 2000 only </TITLE></HEAD>
Confidential -- for Gary and Vanessa of Takeoff 2000, per our non-disclosure agreement..<br>
<br><br>
Hello Gary and Vanessa!
<br>
<br><br>
Here's what we've been working on:
<a href="three-quarters06.jpg"><img src="small-three-quarters.jpg" align=top></a><br><br>
(You can click on the photos to get detailed close ups. If you have a slow modem, they may take a long time to load...) <br><br>
We're still in the prototype stages, but these photos should give you a good
idea of where we're going. <br><br><br>
I'm hoping you can help with the hull of this craft. We created the hull for the pointed craft by vacuum forming sheets of white styrene -- we painted after the hulls were formed up. I'm interested in whether you can mold a similar hull out of foam..<br><br><br>
Here's a photo showing four hulls, with all the accessories removed.
<a href="imac-advertisement.jpg">
<img src="small-imac-ad.jpg" align=top></a><br><br>
In this next photo, in the background, you can see the same four hulls from different angles.
Pay no attention to that white craft in the foreground - it is
a different, unfinished, design - we're concentrating on the larger pointed craft first.
<a href="multiple-crafts.jpg">
<img src="small-multiple-crafts.jpg" align=top></a><br><br>
To help you get a better idea of how the hull is shaped, here are two
more photos of a finished craft (well, actually, an almost finished craft):
<a href="close-three-quarters.jpg">
<img src="small-close-three-quarters.jpg" align=top></a><br><br>
<a href="front.jpg">
<img src="small-front.jpg" align=top></a><br><br>
I'm curious whether you can mold foam to a similarly detailed shape. If
not, I'm still interested -- even the shape of a basic meat tray would work.
As an example, click <a href="thing1.jpg">here</a>
and <a href="thing2.jpg"> here</a> to see photos of some earlier prototypes made, literally, out of foam meat trays.
In addition to the pointed formed craft, I'm also assembling a simple kit of this nature.<br><br>
I'd like to talk by phone -- just let me know when would be a good time for me
to call, or feel free to call collect anytime: 847-332-2267.<br>
<br>
Thanks! Looking forward to talking with you!<br>
<br>
Eric Goldstein<br>
Goldstein Hovercrafts, LLC
<br><hr><hr>
Mike - After I wrote that note, then we added a built-in "airbox"
in the back:
<img src="built-in-airbox.jpg">
<br>
There is an extra hined piece, called "the trapdoor", in back that lets you
pick the lift-thrust ratio for the rear propeller:
<br><br>
zero lift in back, all lift in front is good for fast operation,<br>
50% lift in back, 100% lift in front is fun if there is no skirt - lots of visible air gap, <br>
40% lift in back, zero lift in front is good for a fast one motor craft.<br>
<br>
Oh, I should be more clear:
First, the skirt is removable (the craft works either way).
Zero lift in the front is possible because the lift motor is removable - the lift duct can be covered up with a
hull plate, and then the craft can be run in a one motor mode. The one motor mode
saves on batteries, and is also interesting educationally -- changing the lift
to thrust ratio results in counter-intuitive behavior.