Cri Cri Construction South Africa

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launch
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Cri Cri Construction South Africa

Unread post by launch » Sun Sep 05, 2010 6:04 pm

I am intending to construct a Cri Cri (Cricket) over the next few years. I have aquired a set of plans and am in the process of buying materials for construction. If I understand the local laws correctly, I will be able to register it as a NTCA, and as far as licensing is concerned, I will just need to subject the airframe to tests, I do not have to do analysis on the components, but I will be working closely with the CAA guys to ensure everything is being done according to law.

Currently I am still in the dark about the minimum instrument requirements, as well as personal licencing. Am I allowed to fly it on a PPL, or do I need a twin rating as well?

Any input, criticism, etc. will be appreciated.
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Cheers
Launch
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George
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Re: Cri Cri Construction South Africa

Unread post by George » Mon Sep 06, 2010 8:13 am

Can fly on PPL
Instruments would be std. Think it compass, asi, alti?
Since there are 2 donks a twin rating would be required "strictly" speaking.

Good luck and keep us posted.
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Re: Cri Cri Construction South Africa

Unread post by calypsoSA » Mon Sep 06, 2010 8:56 pm

Will be keeping a close eye.
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Re: Cri Cri Construction South Africa

Unread post by angelwingsthesecond » Mon Sep 06, 2010 10:06 pm

I will be watching this space too. Where in SA are you located?
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Re: Cri Cri Construction South Africa

Unread post by launch » Tue Sep 07, 2010 9:56 am

angelwingsthesecond wrote:I will be watching this space too. Where in SA are you located?
Pretoria East
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Theuns v V
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Re: Cri Cri Construction South Africa

Unread post by Theuns v V » Fri Sep 10, 2010 8:05 pm

Interesting project!
What engines are you planing on using?
Chat to the model lads about some of the new generation large scale engines.Light, reliable, very strong and relaively cheap (compared to any full size engine)
Where will you be getting your allu extrutions from? The allu sheet is eazy.
As for instruments - Alt, ASI ,compass, radio, oil temp ,oil press.
VSI just a nice to have.

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Re: Cri Cri Construction South Africa

Unread post by launch » Sat Sep 11, 2010 9:31 am

Theuns

Thanks for the info. I'm planning to use 2 twin opposed 20HP 3W engines, that I'm removing from two of my Yaks that I'm planning to put bigger engines in. The engines have both done about 60hrs, so they're just about run in nicely. I'm still trying to figure out if twin ignition (4 plugs per engine) is required. Materials wise I'm still doing research into the availability of materials. At this stage I'm considering using mainly composites, as my experience in the radio control industry is far more developed than my sheetmetal skills, but I'm willing to learn. Availability of composites is also far less of a problem, and in case of a ding it is much easier to repair damage.

Cheers
Launch
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Re: Cri Cri Construction South Africa

Unread post by Theuns v V » Sat Sep 11, 2010 2:15 pm

Availability of composites is also far less of a problem, and in case of a ding it is much easier to repair damage.

No problem getting the allu here, Sheet (2024T-3 I would recon) and rivets at Alclad @ FALA.The few extrutions you could import through an agent.

I would be very carefull changing the design in such a radical way, the CAA engineering dept will want you to get an engineer to re-work the plans.This costs allot!

Sheetmetal is much easier to repair than composites. Sheet can't delaminate or not cure fully :wink:. I believe that you can't beat sheet on that size for stiffness and lightness.

As for the engines, I would leave the engines as they are, they rarely if ever loose a plug.
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Re: Cri Cri Construction South Africa

Unread post by tanglefoot » Sat Sep 11, 2010 8:22 pm

launch wrote:........Availability of composites is also far less of a problem, and in case of a ding it is much easier to repair damage......
Your ARE remembering that you will be INSIDE the plane when you "ding" it :?: I'd worry more about repairing the pilot than repairing the plane :roll:
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Re: Cri Cri Construction South Africa

Unread post by launch » Sat Sep 11, 2010 8:37 pm

lol. Thanks once again for the info guys. I am an Aeronautical engineer, so redesigning isn't a problem, financially, anycase. I'm also looking into a ballistic chute behind the cockpit at the moment. Financially I don't have a ballpark figure yet, the costs just keep on stacking up, but my hopes are high about building this aircraft.

Cheers
Launch
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Re: Cri Cri Construction South Africa

Unread post by Scotsman » Sun Sep 12, 2010 7:40 am

BTW last time I was at Alclad they did have some aluminium extrusion, in case you are interested.
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Re: Cri Cri Construction South Africa

Unread post by angelwingsthesecond » Mon Sep 13, 2010 8:29 pm

launch wrote:lol. Thanks once again for the info guys. I am an Aeronautical engineer, so redesigning isn't a problem, financially, anycase. I'm also looking into a ballistic chute behind the cockpit at the moment. Financially I don't have a ballpark figure yet, the costs just keep on stacking up, but my hopes are high about building this aircraft.

Cheers
Launch
I am very interested in you research and build plans for the cri-cri. If you do decide to go ahead I would love to be involved in any way I can. Pm me if interested.
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Re: Cri Cri Construction South Africa

Unread post by angelwingsthesecond » Mon Sep 27, 2010 10:42 pm

So any news on your plans to build??
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Re: Cri Cri Construction South Africa

Unread post by Theuns v V » Tue Sep 28, 2010 8:40 am

I wonder it even composites can be built as light as allu on this small scale? I have my doubt about that.And I recon it will be more expensive to do with plastic.

T
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Re: Cri Cri Construction South Africa

Unread post by angelwingsthesecond » Sun Feb 13, 2011 8:26 am

So, Launch... Have you started your build yet? Any further updates?
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