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Old Jun 21, 2008, 09:19 AM
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Claude G. Vest's Avatar
Indiana
Joined Jan 2003
410 Posts
Quote:
Originally Posted by Shack
I was delighted to find I could get foam cores & plans from the AMA Plans Service for the Sr. Slo Motion, so I made my order [$53.00]

After a 3-4 week wait, they arrived. Plans were good, cores were for wrong plane. Called them up & they sent the right cores. They were awful! Had 1/8" "gullies" fully span-wise on the top surface. Deep slits cut in both ends of both cores. One wing longer than the other by 3/8". Cores cut with about 1" sweep-back [supposed to be straight]. Cores did not fit saddles.

It took some considerable time to fix all that; I didn't want to wait any longer.

The good news is she's almost ready to cover, all wood is "Balsa-rite"ed, Saito FA-82a is test run & ready to install [it will idle reliably at 1700 rpm].
2.4 Gh radio ready to go in.

Thanks to Claude for the tutorial.

Shack
When I last visited the AMA headquarters I got to see the foam CNC.

It looked like a good unit, they must not have a good 'controled' power supply for the cutting wire to have those gullys etc.

I'll remove the info on my form letter informing people about the AMA cutting cores, until I hear they've got the bugs worked out of the system.

http://www.rcgroups.com/forums/showthread.php?t=462759

is where I tell people to go to learn to cut thier own cores.

Sorry to hear about your troubles with the cores.

I'm waiting to hear back from Barry DeCoene, Trillium Balsa Ltd. as to pricing of the large elevons for the Desperado 3000.

So far Trillium Balsa is the only balsa supplier to even attempt to cut them for me.

Providing they won't break the bank, I'll be showing some of my Simitar covering tips soon.

My next post will show just a little bit more details of the fiberglassing with water-based polyurethane.

Tight turns,

Claude
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Old Jun 22, 2008, 08:18 AM
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pval3's Avatar
raleigh, NC usa
Joined Aug 2001
1,953 Posts
core source

Hey guys

read the issues with the ama core cutting service and was rather frustrated. You would think that the AMA would use our dues dollars better and not release anything that was sub par . . . . . .. .

None the less, I really like the mc clain wing cores stuff and find it to be the best and most consistent quality I have ever found.

www.mwcores.com

Prices are beyond reasonable and the guy will cut anything for you, just send him the specs.

Fast production and fast shipping make it a home run!

phil
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Old Jun 23, 2008, 06:27 PM
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Claude G. Vest's Avatar
Indiana
Joined Jan 2003
410 Posts
Desperado 3000 Build Finishing Fiberglass the Wing etc.

Finished fiberglassing the wing.

Am still waiting on a price quote from Trillium Balsa for the elevon stock.

I'm now at the stage of sanding, filling sanding etc.

Will sand and fill until it's perfect or am sick of looking at it.

Usually the latter.

Then the covering will begin!

Tight Turns,

Claude
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Last edited by Claude G. Vest; Jun 24, 2008 at 02:46 PM.
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Old Jul 04, 2008, 06:39 PM
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Claude G. Vest's Avatar
Indiana
Joined Jan 2003
410 Posts
Desperado 3000 Build Finishing Fuselage/Wing Joint and Fuel Proofing

I'm almost ready to start covering, once the fuel proofing is done.

I use thinned epoxy mainly because it soaks deep into the wood and spreads easily.

Post any questions here.

Tight Turns,

Claude
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Old Jul 12, 2008, 04:49 PM
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EZ Ahab's Avatar
Abilene TX
Joined Apr 2008
6 Posts
Cores for Simitar designs or others

I have a rather large CNC hotwire foam cutter that I built to cut cores for full scale homebuilt aircraft. I've also been an R/C modeler off and on for 22 years now and I've been flying a Simitar Tracer 40 for at least the last 13. Great airplane btw; nearly indestructable to have lasted this long.

I can cut cores for Simitars or pretty much any other aircraft you can think of. I've been wanting to expand my business to modeling so, in order to get started, here's what I'll do...For a limited time (the first 5 or so) I'll cut model sized cores for free if you'll work with me on working out any bugs that may come up and pay the actual shipping charges. If you're interested, send me a private message or find my real email address and phone number on my website www.eurekacnc.com.
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Old Jul 15, 2008, 10:27 AM
Registered User
Claude G. Vest's Avatar
Indiana
Joined Jan 2003
410 Posts
Simitar Penultimate Biplane Flying Wing Plans

Here are the finished plans for my Simitar Penultimate Biplane Flying Wing.

These were drawn by Don Tester, AKA Don from OZ. Thank you DON!

He and I exchanged many emails over a few weeks, me sending scans and notes, him sending me drawings in metric, me putting notes in english standard, etc.

We have desided to share them with everyone.

If you want to build one for yourself, I'll help you as much as I can, with the exception of cutting cores.

The CG is about 1 1/4 or 1 1/8 inches back from the leading of
the top wing.

A few notes to everyone who wants to build one.

This is one of the more complex building Simitars I have ever
designed/built.

I can not recomend it to anyone who hasn't built at least two of the
other designs.

This plane must be built with both wings, struts, center pylon, and
everything else perfectly lined up.
.
I am used to flying super sensitive/quick reacting/overpowered
Simitar designs.

This is the first one I programed expotential in my transmitter in
order to tame the beasty down. (-75% on my radio, other
manufacturer's radios you use positive percentages)

This plane rolls faster than an Astron 40, I estimate the roll rate
to be 3 almost 4 rolls per second.

I ask some of my flying buddies to count the rolls, none of them has
yet to do it.

If I just snap the stick to one side, then let it snap back to
neutral, it rolls 1 to 1 1/2 times.

It will loop, but if you try to loop with full up, the elevons act
like air brakes and about halfway through it just flops over.

If you are conservitive with the elevator function it will loop,
inside and outside, fairly tightly and easily.

With all of the side area, flat fat fuselage, center pylon, and extra
wide struts, and large rudder, it knife edges better than any of my
other Simitars.

One of my favorite aerobatic moves now with this plane is to dive a
bit to build up a little speed, pull vertical, jam both sticks to top
center, and the plane just wads up in the air flipping end over end,
wingtip to wingtip, then settles into an inverted flat spin. Center
the controls and the spin stops, a touch of up, a short dive to get
airspeed then recover normal flight with a half loop. I have an
exhaust extention on the muffler of the OS 46 AX. Little or no fuel
residue gets on the bottom of the plane during flights when I don't
do this trick. During this maneuver, it gets on the top wing, the top
of the bottom wing, the outside sides of the struts, and the rudder!

If the airframe was normal rib and spar construction, I don't think
it could withstand the stresses of that maneuver.

Hope this didn't scare anyone away from the project,but it really is
what Bill Evans would refer to as a "Hellion",(pronounced hell-yun)
once you get used to it, it really is fun to fly.

Tight turns,

Claude
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Last edited by Claude G. Vest; Jul 20, 2008 at 09:38 AM. Reason: Pictures Added
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Old Jul 15, 2008, 05:44 PM
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EZ Ahab's Avatar
Abilene TX
Joined Apr 2008
6 Posts
I don't see any reason I couldn't cut cores for this. Send me a private message if anyone wants some. You could also get my real email address by going to www.eurekacnc.com.

Are the Soaring Research / Evans products such as the X-hinge and corefilm still available?

Sadly I crashed my Tracer yesterday evening. I'm not 100% sure what happened but I think I took off with high rates enabled and got into an accelerated stall. It got pointed straight down and wouldn't pull out. The airplane is probably repairable but the worst casuality was the LiPo and ESC. They are both basket cases. Except for the area of the wing where the dowel pins hold it to the fuselage, the wing hardly had a scratch on it.
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Old Jul 15, 2008, 09:40 PM
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Claude G. Vest's Avatar
Indiana
Joined Jan 2003
410 Posts
Quote:
Originally Posted by EZ Ahab
I don't see any reason I couldn't cut cores for this. Send me a private message if anyone wants some. You could also get my real email address by going to www.eurekacnc.com.

Are the Soaring Research / Evans products such as the X-hinge and corefilm still available?

Sadly I crashed my Tracer yesterday evening. I'm not 100% sure what happened but I think I took off with high rates enabled and got into an accelerated stall. It got pointed straight down and wouldn't pull out. The airplane is probably repairable but the worst casuality was the LiPo and ESC. They are both basket cases. Except for the area of the wing where the dowel pins hold it to the fuselage, the wing hardly had a scratch on it.
Yes Billl was still in business as of last year but said he wasn't going to make kits anymore, not enough people building.

I'll get on your website and email you the usual stuff.

Tight turns,

Claude
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Old Jul 18, 2008, 09:05 PM
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Claude G. Vest's Avatar
Indiana
Joined Jan 2003
410 Posts
Simitar Penultimate Flying Wing Biplane Plans

In Adobe format.

Tight Turns,

Claude
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Old Jul 20, 2008, 05:39 PM
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Claude G. Vest's Avatar
Indiana
Joined Jan 2003
410 Posts
Desperado 3000 Build Attaching The Elevons

Sorry this has taken so long, a balsa supplier that promised they could cut the elevon stock for me has not sent them, and hasn't answered any of my emails.

After two weeks of waiting I took this entire weekend and constructed my own elevons.

I started by gluing 1/4 inch 'ribs' to 1/16 inch balsa sheet, 4 inches wide and pre cut for the elevon outline, then added 1/8 inch sticks diagonally for strength.

I glued several ribs side to side making an extra wide solid area for the control horn mounting area.

1/2 inch triangle stock was then glued to the front of each elevon, followed by the top sheeting.

In order for a Simitar design to fly properly the elevon hinge line must be sealed.

I have used Bill Evans X-Hinge on all but the first Simitar I built, and it is very easy to use and it is also forgiving.

It can be peeled back up and re-ironed if there was a mistake made lining it up.

I hope to start covering the wing tomorrow night, I won't show the entire covering process, just a few highlights until it is finished.

If you have any questions post them here.

Tight Turns,

Claude
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Old Jul 25, 2008, 06:49 PM
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Claude G. Vest's Avatar
Indiana
Joined Jan 2003
410 Posts
Desperado 3000 Wing Covering Highlights

I'm covering my Desperado 3000 with Ultra-Cote, following the same color scheme as one of the other Simitars another modeler posted in the Yahoo Group.

http://groups.yahoo.com/group/Simitar/

The colors being used are White, Pearl Yellow, Pearl Red, Pearl Blue, Crome, and Gold.

This is the progress so far.

I cover my iron with a baby sock and cable tie it in place.

It will take a few more days to get the top of the wing covered.

I hope to be ready fro the flying field in about two weeks.

Post any questions here!

Tight turns,

Claude
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Old Jul 29, 2008, 09:44 PM
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Claude G. Vest's Avatar
Indiana
Joined Jan 2003
410 Posts
Astron 40 Kit review from Model Airplane News

Many thanks to Alan G. Galinko for sending me this article!

Tight Turns,

Claude
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Old Aug 10, 2008, 08:01 PM
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Claude G. Vest's Avatar
Indiana
Joined Jan 2003
410 Posts
Desperado 3000 Flys!!!!!!

After adjusting and adjusting for over an two hours, Perry carb and Perry pump, I finally got the engine to run respecably well.

First takeoff attempt front wheel fell off, broken prop.

Club members helped find all the pieces.

Second takeoff attempt success, but engine died after second turn.

Another hour of adjusting.

Third takeoff attept/second official flight success!

Rolls are just as fast as all my other Simitars.

Loops and turns can be very tight.

Flew for 5 minutes and called it a night.

Had about 1/3 of my 24 oz fuel left.

I am very happy with the aircraft.

Tight turns,

Claude

Stickers are from http://www.stickerchick.com
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Old Aug 14, 2008, 10:24 AM
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Claude G. Vest's Avatar
Indiana
Joined Jan 2003
410 Posts
Desperado 3000 rudder attachment

The rudder attachment shown on the plans isn't strong enough.

My rudder, partially seperated during my third official flight yesterday resulting in minor damage to the fuselage.

The rudder fouled the elevons and the plane fluttered down.

Any other plane would have been sticks.

The firewall partially seperated from the fuselage inner walls.

The right landing gear wire was slightly bent, that shows the strength of my method for attaching the landing gear blocks, that is 1/4 inch music wire!

I hope to get it back and flying this weekend.

Claude
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Old Aug 16, 2008, 08:26 PM
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Claude G. Vest's Avatar
Indiana
Joined Jan 2003
410 Posts
Desperado 3000 repair progress.

I started the repair by removing the triangle stock from the rudder.

I then removed 3/4 inch from the bottom of the rudder, then 3/4 inch of the covering from the vertical stab.

A 3/8 inch slot was then cut into the top of the fuselage.

The rudder was epoxied into the slot.

After the epoxy set, the fuselage was flipped over and the 1/16 inch asymmetrical plywood doublers were installed with more 30 minute epoxy along with endgrain triangle stock and some more epoxy with Micro-Ballons to fill any and all gaps internally.

Filler then was put into the gaps left over on the tops of the fuselage.

Hope to star recovering tomorrow.

And maybe a test flight.

Tight turns,

Claude
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