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General control line discussion => Open Forum => Topic started by: scott ross on June 29, 2012, 05:43:50 AM

Title: AMA vs UHP Imitation
Post by: scott ross on June 29, 2012, 05:43:50 AM
Is there any differences between the AMA & UHP Imitation plans?

Thnx,
Scott
Title: Re: AMA vs UHP Imitation
Post by: Doug Moon on June 29, 2012, 06:24:11 AM
Hello Scott,

I am not sure if there is any difference.  Steve, UHP owner, is out of town right now for work.  He should be back in a week or so and will answer question about it then.

Thanks

Title: Re: AMA vs UHP Imitation
Post by: SteveMoon on June 29, 2012, 06:48:02 AM
Scott: there is no difference as far as wing span, nose moment, tail moment, wing root and tip,ribs, etc. The differences that exist come from the fact that I redrew the plans for how the laser would see them. The laser we used had a 12 x 24 bed (pretty common) and thus, all the parts are designed to fit in this space. Otherwise, there is no difference in the overall dimensions.

Steve
Title: Re: AMA vs UHP Imitation
Post by: Allen Brickhaus on June 29, 2012, 12:55:11 PM
Here is my Imitation as from AMA plans.  It flew well for me.

Allen
Title: Re: AMA vs UHP Imitation
Post by: Bill Little on June 29, 2012, 02:47:49 PM
Here is my Imitation as from AMA plans.  It flew well for me.

Allen

That's a sharp looking Imitation, Allen!

What did you power it with?

Thanks
Bill
Title: Re: AMA vs UHP Imitation
Post by: Allen Brickhaus on June 30, 2012, 09:03:18 AM
Had an ST 46 and a rear exhaust muffled OS 40vf on it.  With the system of the firewall construction and use of R/C motor mounts, you can put almost anything on it.

Allen
Title: Re: AMA vs UHP Imitation
Post by: Bill Little on June 30, 2012, 11:30:49 AM
Had an ST 46 and a rear exhaust muffled OS 40vf on it.  With the system of the firewall construction and use of R/C motor mounts, you can put almost anything on it.

Allen

Thanks, Allen.  I have a set of foam cores for the wings and stab/elev. that were cut back when the original article was written.

What type of "muffler" did you use on the .40VF??  And how did you "run" it?

Thanks!
Bill
Title: Re: AMA vs UHP Imitation
Post by: SteveMoon on July 01, 2012, 10:57:40 AM
The firewall/RC mount system is great for trying different powerplants. Mine has
had an OS LA 46, a Saito 40, and is now electric powered.

Steve
Title: Re: AMA vs UHP Imitation
Post by: Allen Brickhaus on July 02, 2012, 08:10:33 PM
Thanks, Allen.  I have a set of foam cores for the wings and stab/elev. that were cut back when the original article was written.

What type of "muffler" did you use on the .40VF??  And how did you "run" it?

Thanks!
Bill

I used a header and capped it off at the end with a wooden dowel slathered with slow drying epoxy and force fit into the end of the header.  Then I put two small screws in from the opposite sides of the wooden plug to further hold it in place.  Then I drill holes in the bottom end of the header like a tongue muffle would have.  Hope this helps.  Even included a pressure plug for uniflow pressure to the tank.

Allen
Title: Re: AMA vs UHP Imitation
Post by: Brett Buck on July 02, 2012, 10:05:21 PM
What type of "muffler" did you use on the .40VF??  And how did you "run" it?

  Local good guy Paul Pomposo flew his Imitation with a piped 40VF for many years with great success.

  Brett
Title: Re: AMA vs UHP Imitation
Post by: Bill Little on July 03, 2012, 11:59:25 AM
I used a header and capped it off at the end with a wooden dowel slathered with slow drying epoxy and force fit into the end of the header.  Then I put two small screws in from the opposite sides of the wooden plug to further hold it in place.  Then I drill holes in the bottom end of the header like a tongue muffle would have.  Hope this helps.  Even included a pressure plug for uniflow pressure to the tank.

Allen

Thanks for the description, Allen!  We have kept a few of our .40VFs since we had such good luck with them.  I know I could put a pipe on it like Brett shows, but the "header muffler" sounds interesting.

Bill