Pitts M12 26% plans available soon  
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All Forums >> RC Airplanes >> Scratch Building, Aircraft Design, 3D/CAD >> Pitts M12 26% plans available soon
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Pitts M12 26% plans available soon - 2/11/2005 3:00:56 PM   
bbt


 

Posts: 55
Joined: 11/11/2004
From: Opwijk, BELGIUM
Status: offline 		I am currently working on the plans for a Pitts Model 12. It looks like a Sukhoi with two wings. I really like it

It is slightly modified for 3D capabilities : increased fuse length, increased wings surface (over 120 dm²), increased control surfaces, ...
Should be OK for F3A aerobatics too.

Some characteristics:
175cm wingspan (26%)
175cm Fuse length,
Engine: 1.80 or bigger
Airfoil: E168 12,45%,
8 servos: 4 ailerons, 1 rudder, 2 elevator, 1 engine
Target weight : 5.5 - 6.5 Kg

The plan should be available for download in a near future.

What do you think?

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RE: Pitts M12 26% plans available soon - 2/11/2005 7:04:00 PM   
Boogie



Posts: 608
Joined: 6/20/2003
From: Gdynia, POLAND
Status: offline 		Wow!!! Very nice plane. How would it perform with mvvs 1.6 or 2.1 gas?? I would make it slightly smaller though. This is fabulous!!!!

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RE: Pitts M12 26% plans available soon - 2/11/2005 9:02:09 PM   
cbcflyer


 

Posts: 7
Joined: 12/3/2004
From: Hernando, MS, USA
Status: offline 		I'm sure you probably have an example you're modeling, but I have a good friend about 1/4 mi down the road who built and flies a full scale one. I can take pictures, measurements, etc if you like. I've got probably 10 hrs of flight time in it. Incredible airplane, especially with the 3 bladed prop. The front cockpit sure is blind on the ground though - much better in the back. Keep us posted on the plans.

Brian

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RE: Pitts M12 26% plans available soon - 2/11/2005 9:32:58 PM   
SilverEagleBW


 

Posts: 418
Joined: 10/17/2003
From: Pittsburgh, PA, USA
Status: offline 		Great bbt!Looking forward to the plans,,,,,,!!! ,,,,Another plane to build! YAY!

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       Post #: 4

RE: Pitts M12 26% plans available soon - 2/12/2005 2:22:18 PM   
bbt


 

Posts: 55
Joined: 11/11/2004
From: Opwijk, BELGIUM
Status: offline 		Slade,

It will be difficult to reach the level of quality of your plans. I doing my best

Anyway, here is a preview. Still a lot of work but it starts looking good.

Cheers,
Bernard

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RE: Pitts M12 26% plans available soon - 2/12/2005 3:37:56 PM   
paof


 

Posts: 16
Joined: 3/25/2004
From: maracaibono, VENEZUELA
Status: offline 		Hi BBT another bipe to build,wonderfull.
FLY BETTER FLY BIPES. Great job .
PAOF from Maracaibo Venezuela South America,

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RE: Pitts M12 26% plans available soon - 2/12/2005 8:03:58 PM   
SilverEagleBW


 

Posts: 418
Joined: 10/17/2003
From: Pittsburgh, PA, USA
Status: offline 		bbt,Your plans look GREAT!The formers are excellent,along with everything else that you have done!You are doing a very good job on this plane,after you are done with the plane i might work the plan set over for you. Just keep up the good work!

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       Post #: 7

RE: Pitts M12 26% plans available soon - 2/15/2005 8:34:44 PM   
Gray Beard


 

Posts: 1539
Joined: 4/21/2003
From: Hemderson, NV, USA
Status: offline 		Now that looks like A plane worth building. Are you designing it so the wings are easy to remove and install at the field?? That's the only problem I have with my Bipes and the reason I keep them under 70 inches.
When you get them finished and posted I will have to pick your brain as to how to download them and put them on A CD so I can have them printed. {{ Computer Stupid}
Thanks for sharing this plane with us.
Gene

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RE: Pitts M12 26% plans available soon - 2/15/2005 10:55:00 PM   
mangolo


 

Posts: 108
Joined: 6/17/2002
From: santo domingodn, DOMINICAN REPUBLIC
Status: offline 		bbt: thanks for the offer,will be monitoring this so we can build one,beautiful plane

thanks again

WALDO

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       Post #: 9

RE: Pitts M12 26% plans available soon - 2/15/2005 11:13:20 PM   
bbt


 

Posts: 55
Joined: 11/11/2004
From: Opwijk, BELGIUM
Status: offline 		Thanks Slade. To be honnest, I am quite happy with the results so far

I just calculated the CG. It looks like I will have to make the tail as light as possible I will have to be creative to make it light and still strong or... may be move the wings a little bit backward. Any suggestions here ?

As a start, what do you think about the following value for the incidence?
upper wing 0°
Lower wing 0°
Elevator 0°
with engine Down thrust 2° & Right thrust 2°

Boogie, I read in a review that a MVVS 1.6 Gas is able to swing a 18x8 Menz-S, wood propeller at 7350 rpm developping a thrust or 6.5 Kg. This would be just enought for 3D if the weight stays within my target of 5.5 - 6.5 Kg.

Gene,
I'll make both DXF and PDF files available (CDR format is for Slade only ). PDF files are usable on virtually any PC and easy to print without specific computer skills.

Here is another preview:

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RE: Pitts M12 26% plans available soon - 2/16/2005 4:37:14 AM   
SilverEagleBW


 

Posts: 418
Joined: 10/17/2003
From: Pittsburgh, PA, USA
Status: offline 		bbt,I wouldn't move the wings back,don't want a short coupled plane.On the incedences,you might want to add around one degree of positive to the stab,lotta biplanes need that,even the Ultimate.You don't need to make a copy in CDR for me,i can open DXF etc.

Not to sure about the 2 degrees of downthrust on the engine,if it was me i would set everything at zero except for two degrees right engine thrust,one degree positive on the stab.Then build the plane and make adjustments as needed,might even want to consider lowering the top wing a bit and see if that smooths things out any.Pretty darn cool plane,well worth taking the time to experiment with the settings to have a superb flyer.

< Message edited by Slade_LoD -- 2/16/2005 10:11:20 PM >

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       Post #: 11

RE: Pitts M12 26% plans available soon - 2/17/2005 2:17:15 PM   
LN-JET



Posts: 202
Joined: 4/2/2003
From: Stjordal, NORWAY
Status: offline 		Nice one!
My MVVS 1.6 gas swings a 18x8 APC @ 8300 rpm with the factory tuned pipe.
It flies my 6kg Cap 232 with authority through most IMAC style aerobatics,
but too little reserve for hovering and serious 3d.
I'd think you will be hard pressed to build this bipe any lighter than that.

Regarding incidence angles, why not use the angles from the original,
or from some of the similar sized Ultimates?


Lars

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RE: Pitts M12 26% plans available soon - 2/19/2005 12:03:05 AM   
bbt


 

Posts: 55
Joined: 11/11/2004
From: Opwijk, BELGIUM
Status: offline 		The plane is largely inspired by the Pitts Model 12. As it is slightly modified, its name will be ... Spirit of Pitts

The plans are finished

Wing incidence will be:
- Stabilizer set at 0
- Bottom wing set at 0
- Top wing set at 0 with some adjustments +/- possible during the trimming out phase.

This weekend I will make some additional sanity checks. I want to be sure that everything will fit perfectly. I should be able to post the DXF & PDF files early next week but I still need to find a host. If not then I will make some time to create my own web page.

My intention is of course to build & fly the plane but ...first the laser cutting sheet. Yes, this will be available too ! I do not want to cut this manually .. I am too lazy

Here is a Spirit of Pitts preview:


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RE: Pitts M12 26% plans available soon - 2/19/2005 12:17:04 AM   
canadagoose



Posts: 651
Joined: 10/27/2002
From: Sparwood , BC, CANADA
Status: offline 		Really nice job bbt, beautiful looking bipe, i would post them up along side Slades plans if you wanted.

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