RE: Pitts M12 26% plans available soon  
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RE: Pitts M12 26% plans available soon - 2/27/2005 4:20:11 PM   
bbt


 

Posts: 55
Joined: 11/11/2004
From: Opwijk, BELGIUM
Status: offline 		Thanks guys for your nice words . The result is worth the effort but believe me ... this is a LOT of work !


Boogie,
The MVVS 1.60 should be OK for a 60" wingspan but keep the weight below 5kg if you want 3D. Do not expect 22lbs of static thrust from this engine. You will most probably get 6.5Kg (14 lbs) of thrust ... or may be a little bit more with a tuned pipe. Your servo setup should be OK for a 60" size.

My setup will be as follow: 4*HS-645MG for ailerons, 2* HS-645MG for elevators, 1* HS-945MG for the rudder and a fast&reliable servo for the motor. The engine will be a MVVS 35cc (2.10) Gas.


Finn,
The laser cut sheets are now finished. I requested a couple of laser cut shops to provide me a quote. If the offer is within my budget then I'll order and start the build as soon as the wood arrives. If everything goes well the bird should be ready end-spring

The fuse sides will be made of lite plywood. I believe that those plywood side combined with the formers + spars are sufficient to build a strong fuse. Some additional holes in the formers could help to save some additional weight.
If you want to scale down the plane then you might consider to use balsa plywood for the fuse formers excepts for C1, C2, C3 and F1, F2, F3, F4. Idem for the fuse side S1 but keep S2 in plywood.
A wingspan /length around 53" should be ideal for a 90 class engine. But again ... 3D or not 3D? That's the question!

About the landing gear and upper wing fixation ... I agree with you that this is too light. Some birch plywood re-enforcement at the right place should do the job. This plane is intended for experienced modelers, I am convinced this small add-on can be done easily.

A small tip... if you scale down my plan to 80% (55 inch) then you should be able to use all the formers without modifications wit 4x4mm and 8x8mm (instead of 5x5 and 10X10). Same for wings ribs

The Laser cut files were sent to Terry earlier today. They should be available on his site soon.

Cheers,
BBT

(in reply to Finn J.)
       Post #: 26

RE: Pitts M12 26% plans available soon - 2/27/2005 4:57:41 PM   
Boogie



Posts: 608
Joined: 6/20/2003
From: Gdynia, POLAND
Status: offline 		BBT:
I still haven't decide which engine I am going to use. Still deciding between mvvs 1.6 and 2.1. The difference in price is about 30 $ which is not much.
One of my friends has this setup in his sukhoi and I will ask him to see what are real facts about those engines. Then I am going to finally choose one of those engines.

_____________________________

Even if nobody believes in you, show that they are wrong.......................

(in reply to bbt)
       Post #: 27

RE: Pitts M12 26% plans available soon - 2/28/2005 9:45:25 PM   
Susto


 

Posts: 18
Joined: 4/19/2004
From: BarcelonaBarcelona, SPAIN
Status: offline 		Hi BBT! I'm Sergio from Spain. You've designed a wonderfull biplane. I was wondering if you could do a 3D version of the plan to see the real model in 3D It could help much to see the different parts of the model. I known you are an expert on Autocad programs. I am interested in build it someday ( when my new workroom will be finished... ) I think a year. I hope during this time somebody has built it and tested flying.

Best regards from Barcelona

Sergio

(in reply to Boogie)
       Post #: 28

RE: Pitts M12 26% plans available soon - 3/4/2005 2:12:22 PM   
ALW Phantom


 

Posts: 98
Joined: 4/2/2003
From: Quakertown, PA, USA
Status: offline 		BBT, I have followed this thread closely and I have to agree with everyone else, OUTSTANDING! I do have a few questions I was wondering if you could answer for me ... I went to the link you posted and downloaded the PDF file of your plane, and after viewing it I was wondering what the lines on the bottom of the wing plans are for? I tried to figure it out, and after I slap my forhead when you give me the answer I will prove once again ... its the easiest things that you start losing at first HAHA! My second question is what would it take to get the full size plans so I can start cutting and building? I thought I would ask you before going to the local copy shop and have some younger person look at me with that face, you know the same one I had at their age. Anyway, once again outstanding plane and yes I agree on the fact its not what you always see. Thanks for future replies ...

(in reply to Susto)
       Post #: 29

RE: Pitts M12 26% plans available soon - 3/4/2005 4:51:07 PM   
bbt


 

Posts: 55
Joined: 11/11/2004
From: Opwijk, BELGIUM
Status: offline 		Sergio,
To be honest ... I am not so good at 3D CAD . My intention is to build the plane and post pictures of the build process. This will be much better than 3D CAD

ALW Phantom,
The 'lines' on the bottom of the wings plans are the formers + spacing for the canopy.
Your options are: build a balsa canopy or a positive for a mold.
My preference is going to a carbon fiber canopy. It should be fantastic on this bipe. Therefore, the mold would be my option. A transparent canopy should be fine too. It's just a question of weight, finishing, taste, time & money

The PDF paper size is at the correct size to build this plane. If you go to a print shop just ask to print at scale 1:1. If the younger person looks at you with that 'face' then you will be entitled to reply: 'what ? Don't you know how to print plans at scale 1:1 ?'

(in reply to ALW Phantom)
       Post #: 30

RE: Pitts M12 26% plans available soon - 3/4/2005 6:19:41 PM   
ALW Phantom


 

Posts: 98
Joined: 4/2/2003
From: Quakertown, PA, USA
Status: offline 		Ok, would you mind humoring me for a second, what size paper will the plans come out on? I mean if I get that "face" can I atleast tell him what the overall size of the paper will be? As far as the canopy, I think Im going with the clear one, more for the ease then anything else. Once again, Thanx!

(in reply to bbt)
       Post #: 31

RE: Pitts M12 26% plans available soon - 3/4/2005 7:33:29 PM   
bbt


 

Posts: 55
Joined: 11/11/2004
From: Opwijk, BELGIUM
Status: offline 		The plan frame is 93.7 * 66.2 inches.

This means that the paper size should be at least that big. Huge isn't it ?

Practically, I believe it will be impossible to print on one single sheet. Usually, print shop can print on multiple paper sheets with crop marks. The crop marks will allow you to adjust & glue the sheets together.

Four B1 (ISO) paper sheets or four A0 paper sheet per plan sheet should be enough.

Feel free to shoot more questions ... you don't see my face anyway

(in reply to ALW Phantom)
       Post #: 32

RE: Pitts M12 26% plans available soon - 3/9/2005 4:05:31 PM   
Boogie



Posts: 608
Joined: 6/20/2003
From: Gdynia, POLAND
Status: offline 		Any updates on Your pitts?? I am just starting mine with mvvs 35 and 64 inches of wingspan. It will take a lot of time to build though.

_____________________________

Even if nobody believes in you, show that they are wrong.......................

(in reply to bbt)
       Post #: 33

RE: Pitts M12 26% plans available soon - 3/9/2005 4:50:44 PM   
ALW Phantom


 

Posts: 98
Joined: 4/2/2003
From: Quakertown, PA, USA
Status: offline 		BBT, In case you didnt see it please read the thread titled WARNING !!!!! I will admit to already downloading the files from the page you linked and rest assure that they are for ME and ME only!!!

(in reply to Boogie)
       Post #: 34

RE: Pitts M12 26% plans available soon - 3/9/2005 4:55:58 PM   
BTerry



Posts: 848
Joined: 4/24/2002
From: Rochester, NH, USA
Status: offline 		What a great-looking plane! I would love to build one. I think this design is begging for laser cut parts.

Who would be interested in going in on a group-buy for a short kit (formers/ribs/fuse sides, etc)? Better yet, has anybody actually cut these parts yet?

I don't have any connections, but I know it would be much cheaper to share the setup cost between twenty or thirty guys and that there are many good cutting companies who would love our business!

Brett

(in reply to bbt)
       Post #: 35

RE: Pitts M12 26% plans available soon - 3/13/2005 6:24:13 AM   
Bat Fastard


 

Posts: 229
Joined: 3/16/2004
From: Manakin-Sabot, VA, USA
Status: offline 		Hey Brett, count me in on a short kit. BTW does anyone want one in 50cc size? That is what im interested in. Im thinking of blowing up the plans to around 68" wingspan or so with about a 15 lb weight. Anyone else interested? BTW I have a ZDZ 50 sitting around with a tuned canister needing a home (as well as an mvvs 1.6 gasser). Thinking this pitts monster would be awesome home for it. Jamie


_____________________________

Prop ripping corn field flyer!

(in reply to BTerry)
       Post #: 36

RE: Pitts M12 26% plans available soon - 3/13/2005 6:32:03 AM   
Bat Fastard


 

Posts: 229
Joined: 3/16/2004
From: Manakin-Sabot, VA, USA
Status: offline 		Sorry guys I wasnt using my conversion calc. the 175 cm wingspan plans are perfect for what I want. Lets get a few more guys for the laser cut kit. Jamie


_____________________________

Prop ripping corn field flyer!

(in reply to Bat Fastard)
       Post #: 37

RE: Pitts M12 26% plans available soon - 3/17/2005 4:58:52 PM   
BTerry



Posts: 848
Joined: 4/24/2002
From: Rochester, NH, USA
Status: offline 		I am asking a few kit cutters for quotes, and I will definitely post the info on RCU if/when I get some prices for you.

Brett

(in reply to Bat Fastard)
       Post #: 38

RE: Pitts M12 26% plans available soon - 3/17/2005 9:41:07 PM   
ALW Phantom


 

Posts: 98
Joined: 4/2/2003
From: Quakertown, PA, USA
Status: offline 		I have all the tools to cut the kit myself, but if the price is right I might just buy one. Lets see what the price comes to and how many are interested. Wonder if anyone makes a glass cowl and canopy that will fit this?

(in reply to BTerry)
       Post #: 39

RE: Pitts M12 26% plans available soon - 3/18/2005 6:31:53 PM   
acrored


 

Posts: 35
Joined: 6/15/2003
From: Santiago, CHILE
Status: offline 		Hi all, i really want to buil this bipe coz it look terrific, i can´t download any