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Building Tips and technical articles. => 1/2 A building. => Topic started by: Bill Little on December 14, 2011, 06:28:21 AM

Title: Design parameters for a .010 powered profile stunter
Post by: Bill Little on December 14, 2011, 06:28:21 AM

Hi All,

As the title says, a .010 powered profile stunter.  I am thinking along the lines of the Goldberg Goodyear profiles suitably reduced in size.  I believe the profile fuselage will be a bit better for handling instead of a full fuselage ship.  Others are under speculation, but I need to know some some parameters, target weight, etc.  Might be a case of some of that super expensive 3 lb wood from Campbells! LOL!!

Thanks
Big Bear

Title: Re: Design parameters for a .010 powered profile stunter
Post by: Larry Renger on December 14, 2011, 10:25:45 AM

I would hazard a guess that about 80 sq. in. and 3 ounce weight would be good.  I had a 1/2A Snapper at 4 ounces and 105 sq.in. with the .020 and it was indeed "snappy".  Look up Randy Heydon's Lil Bit, as it was competition capable.

Title: Re: Design parameters for a .010 powered profile stunter
Post by: Bill Little on December 14, 2011, 10:28:27 AM

Thanks, Larry!

Big Bear

Title: Re: Design parameters for a .010 powered profile stunter
Post by: Jim Thomerson on December 14, 2011, 01:57:52 PM

I built a profile with, probably, a 12 x 3, 1/8 sheet wing.  I made the bellcrank out of a plastic picnic knife. I flew it on thread lines, about 12 ft.  It would loop and do figure 8's. I later put a PeeWee 020 on it and flew on a little longer lines. 

Title: Re: Design parameters for a .010 powered profile stunter
Post by: Brett Buck on December 15, 2011, 07:36:40 PM

Quote from: Jim Thomerson on December 14, 2011, 01:57:52 PM

I built a profile with, probably, a 12 x 3, 1/8 sheet wing.  I made the bellcrank out of a plastic picnic knife. I flew it on thread lines, about 12 ft.  It would loop and do figure 8's. I later put a PeeWee 020 on it and flew on a little longer lines. 

  I would guess that you probably don't need to bother with a prop, or actually starting the engine. These teeny-weenies are easy to just whip up to speed.

    Brett

Title: Re: Design parameters for a .010 powered profile stunter
Post by: Larry Renger on December 15, 2011, 11:47:09 PM

But .010's serve a purpose!  Mosquitos are attracted to the sound and stick to the oil! (REALLY!!!) They provide a vital service to mankind!  And to think of the millions of $ that have been spent on mosquito eradication research when such a simple solution is available!   %^@

Title: Re: Design parameters for a .010 powered profile stunter
Post by: pat king on December 17, 2011, 11:47:29 AM

Here is a Micro Ringmaster Stunter for the Cox .010 engine. It has a built-up wing with a 17 1/4" wingspan and 53.5 square inches of wing area. That is 56% of the wing area of a Baby Ringmaster. It is not Larry's recommended 80 square inches, but I think the size and wing area are OK. My Micro Ringmaster is a 1/4 scale Ringmaster with a slab wing. It has 23.8 square inches of wing area. it will not really stunt, it is more of a rocket than a stunt airplane. Let me know what you think.
Thanks, Pat

Title: Re: Design parameters for a .010 powered profile stunter
Post by: Larry Renger on December 17, 2011, 03:57:16 PM

Looks like fun to me!  ;D  I hope someone builds one and lets us know how it goes!  It certainly will fly!

Title: Re: Design parameters for a .010 powered profile stunter
Post by: Bill Little on December 17, 2011, 05:28:27 PM

Brother Pat!

That makes me want to consider a Micro Super Ringmaster Stunter! ;D

(a Micro Ringmaster Imperial Stunter would be the bomb! )

Bill