Katana, Zlin or Stephens Acro plans

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Katana, Zlin or Stephens Acro plans

Postby Touch-n-go » Mon Jun 22, 2009 7:32 pm

Can anyone please help me with plans for a Katana, Zlin 45/50 or Stephens Acro? Want to scratch build one for scale competitions. My 5 year project... :idea:
Last edited by Touch-n-go on Tue Jun 23, 2009 5:44 pm, edited 1 time in total.
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Re: Katana plans

Postby BalsaPilot » Mon Jun 22, 2009 7:54 pm

What Size (motor) do you want? I can Draw some up for you!!
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Re: Katana plans

Postby Touch-n-go » Mon Jun 22, 2009 8:50 pm

hey thanks. was thinking along the lines of a 30% size. know the t30 katana has a wingspan of 7,7m. as long as i can enter scale competitions. wanted to go for a Pitts Special, but maybe later.
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Re: Katana plans

Postby BalsaPilot » Mon Jun 22, 2009 8:54 pm

jish ok thats way bigger than what im capapble of, i can go up about 2.5 meter wing span thats it!!!
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Re: Katana plans

Postby mikestark » Mon Jun 22, 2009 9:04 pm

Touch-n-go wrote:Can anyone please help me with plans for a Katana? Want to scratch build one for scale competitions. My 5 year project... :idea:

Have you seen pictures of the full-size Katana.

Quite different from the models :shock: :shock: :shock:

If you are still interested I have some 3 views and some pics of the full size, some of which are attached.

BTW I have the Sebart Katana 30, Sebart Katana 50 and the 40% Krill Katana, and they are way prettier than the full size but as a result will not win any scale competitions. :roll:
Attachments
KIF_13.jpg
Prototype - note the elevators
KIF_13.jpg (26.51 KiB) Viewed 726 times
KIF_52.jpg
Prototype Katana
KIF_52.jpg (34.19 KiB) Viewed 725 times
Katana&Sukhoi_8-1.jpg
Prototype Katana standing next to a Sukhoi
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Re: Katana plans

Postby Touch-n-go » Mon Jun 22, 2009 9:31 pm

BalsaPilot wrote:jish ok thats way bigger than what im capapble of, i can go up about 2.5 meter wing span thats it!!!


30% =2.31m. full size =7.7m

Mike thanks i got the same pics from Pietro Terzi website including a video of maiden flight, thanks again. do you think a scale katana will be difficult to fly?
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Re: Katana plans

Postby Dobo » Mon Jun 22, 2009 9:57 pm

A Zlin 50 or a Stephens Acro would be nice subjects for scale competition. They will fly nicely as well. The models of the Katana are so different to the full size, that I can only imagine a direct copy may not perform too well.

I do have a set of 1/4 scale Pitts plans. They will cost you R 2500.00 but I will throw in a brand new Zenoah 20 cc petrol motor with electronic ignition :D :D :D :D
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Re: Katana plans

Postby Touch-n-go » Mon Jun 22, 2009 11:09 pm

Dobo wrote:I do have a set of 1/4 scale Pitts plans. They will cost you R 2500.00 but I will throw in a brand new Zenoah 20 cc petrol motor with electronic ignition :D :D :D :D


i do have plans for a Pitts, but thought i would start with something "less" challenging as a first project.
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Re: Katana plans

Postby mikestark » Tue Jun 23, 2009 6:11 am

Agree with Dobo on the Katana issue.

Would also recommend a Zlin as it has classic model lines. Again if you are interested I have a complete set of 3 views in various scales that I could let you have.

Also there are a number of them around for documentation purposes. The quality of the documentation as well as ready access to a full size example always makes the project easier. Choose a particular airframe and use that as your base because when you start looking closely, you cannot believe how different each plane is.
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Re: Katana plans

Postby SYBOT » Tue Jun 23, 2009 9:08 am

Dobo wrote:A Zlin 50 or a Stephens Acro would be nice subjects for scale competition. They will fly nicely as well. The models of the Katana are so different to the full size, that I can only imagine a direct copy may not perform too well.

I do have a set of 1/4 scale Pitts plans. They will cost you R 2500.00 but I will throw in a brand new Zenoah 20 cc petrol motor with electronic ignition :D :D :D :D


She looks mean and lean - I think you may experience difficulty in knife edge flight, but looking at extras, yaks and edges - all have +- 10% deviations from the real ones, be it moment arm, deeper fuzz's, control surface size and even putting 34% wings on 33% fuselages. I think this can be built to fly nicely, if 3d is not an issue.
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Re: Katana plans

Postby edge540 » Tue Jun 23, 2009 11:30 am

Without having read the entire post, here are some plans.

regards
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Wing.zip
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Parts.zip
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Fuse.zip
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Re: Katana plans

Postby morneh » Tue Jun 23, 2009 11:54 am

What program do you need to open those plans?
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Re: Katana plans

Postby mikestark » Tue Jun 23, 2009 12:00 pm

SYBOT wrote:
Dobo wrote:A Zlin 50 or a Stephens Acro would be nice subjects for scale competition. They will fly nicely as well. The models of the Katana are so different to the full size, that I can only imagine a direct copy may not perform too well.

I do have a set of 1/4 scale Pitts plans. They will cost you R 2500.00 but I will throw in a brand new Zenoah 20 cc petrol motor with electronic ignition :D :D :D :D


She looks mean and lean - I think you may experience difficulty in knife edge flight, but looking at extras, yaks and edges - all have +- 10% deviations from the real ones, be it moment arm, deeper fuzz's, control surface size and even putting 34% wings on 33% fuselages. I think this can be built to fly nicely, if 3d is not an issue.


Sybot, touch-n-go stated in his original post that he wants the Katana to compete in scale competitions. A 10% deviation as allowed under Large Scale rules is not going to cut it in a scale comp. :wink:

It would have to look exactly like the pics :shock:
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Re: Katana plans

Postby edge540 » Tue Jun 23, 2009 12:16 pm

The plans are saved in a DXF format, you would need a DXF viewer or alternatively CAD, to modify the plans.

They are not going to be able to be used in scale comp :shock:

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Re: Katana plans

Postby morneh » Tue Jun 23, 2009 12:19 pm

Can anyone scale those down to a 40 or 60 size?

Where can i get them printed ?
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