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Dec 28, 2012, 02:50 PM
Designing something...
Build Log

5m Akaflieg München Mü23 Saurier scratch build


I have decided to take Fred's drawings and scale them up to 5 meters. I'm doing all of the work in 3D using Rhino. So far I've completed drawings for the stab and part of the wing. I've also cut out the parts for the stab. I couldn't resist doing a little gluing. I still need to do the tip, leading edge and cap strips.

I've attached a couple of pics. Don't you just love how laser cut parts go together like puzzle pieces!

Brian
Last edited by cpdude; Mar 27, 2013 at 12:30 PM. Reason: Title change
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Dec 28, 2012, 02:56 PM
Registered User
jtlsf5's Avatar
Do I sense another test flight in my future? Happy holidays Brian
Dec 28, 2012, 03:20 PM
Designing something...
You never know. Though I expect this one to be a real cream puff.
Dec 28, 2012, 03:43 PM
Retired CAD guy
birdofplay's Avatar
Looking good, even from Indy ! :-)

Bob
Hoosier Cutout Service ( formerly NW Cutout Service )
Dec 28, 2012, 03:44 PM
yyz
yyz
Registered User
yyz's Avatar
Nice Brian! I'm guessing this is going to be electric?

Mike
Dec 28, 2012, 04:20 PM
Designing something...
Quote:
Originally Posted by birdofplay View Post
Looking good, even from Indy ! :-)

Bob
Hoosier Cutout Service ( formerly NW Cutout Service )
I just hope that it come out half as nice as Fred's.
Dec 28, 2012, 04:23 PM
Designing something...
Quote:
Originally Posted by yyz View Post
Nice Brian! I'm guessing this is going to be electric?

Mike
Yes sir. Though I haven't worked out the exact size motor yet.
Dec 29, 2012, 12:15 AM
My hangar is,... "almost" full
No Step's Avatar
This will be one of your favorite birds without a doubt. I'll be watching. Thank you for the heads up. I'm on vacation, not watching the forums as much as I normally do. I'm excited you are building from my drawings. It's an honor! She flies like a dream! You are going to be one happy dude! Good luck with the build.

Fred,.. in Cambodia
Last edited by No Step; Dec 30, 2012 at 04:10 AM. Reason: Remove "design", replaced with "drawing" 8-)
Dec 29, 2012, 01:02 AM
You know nothing....
Stuart A's Avatar
Quote:
Originally Posted by cpdude View Post
Yes sir. Though I haven't worked out the exact size motor yet.
Will that make it an emu.Them birds don't fly
Dec 29, 2012, 08:34 AM
Retired CAD guy
birdofplay's Avatar
Fred would bring his to Skamokowa and just quietly go about cruising around for hours !

A nice quiet valley with Hawks, Eagles, Herons and remnants of the Elk on the runway.

Have a safe trip Fred,

Bob
Jan 05, 2013, 09:21 PM
Designing something...

Some CAD work and parts to show for it...


Well I've been doing a bit of CAD work lately and I've gotten to the point where I felt like cutting some more parts. I ended up cutting all of the wing ribs, sub-leading edge parts and some of the shear webs. Everything seems to fit together very well. I also cut some fuselage parts out, however, they went off to my building buddy before I got a picture of them. The plan at this point is to build two planes at nearly the same time.

Brian
Last edited by cpdude; Jan 05, 2013 at 11:13 PM.
Jan 05, 2013, 09:54 PM
Registered User
Highfly!'s Avatar
I think I left a few ribs at your shop....

Looking forward to do this build together. Fuselage wood should be here next week. I will start working on the fuselage while Brian works on the wing which is almost a big box of lego where all the parts just click together with a drop of glue.

For now I decided to use one of the motors I have laying around a big old Himax 6320-250Kv which should be plenty to take her up. Final power plant choice will be after I get a feeling for the CG.
Jan 05, 2013, 11:12 PM
Designing something...
Quote:
Originally Posted by Highfly! View Post
I think I left a few ribs at your shop....
Yes you did. I decided to leave those ribs out of the picture.
Jan 06, 2013, 03:56 AM
My hangar is,... "almost" full
No Step's Avatar
Having never built an aft fuselage of this style before, I just built both fuselage sides off the drawings, joined them at the top with structure, and brought the bottom edges together. Bad idea. The sides became foreshortened at the bottom by about 1/8" - 3/16" and required breaking glue joints and adding balsa to bring them inline properly at bottom. Lesson learned. Suggest some sort of building device to hold everything inline properly while assembling. Yes, I felt silly

Fred,... In Bangkok
Jan 06, 2013, 06:41 AM
Designing something...
Fred,

Thanks! I think you've just stopped us from making the same mistake.

Here's what I'm thinking...I'll take the 2d side view of the fuselage and project it onto the 3d fuselage side. Then I'll just smash/unroll it back to a 2d. At that point all of the curves and slanted distances will be taken into account.

I've had to do this before on various curved parts before.

Brian

p.s. Mannie don't start gluing the fuselage together just yet!
Last edited by cpdude; Jan 20, 2013 at 10:22 PM.


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