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RE: CAC Boomerang 1:4.5 CA-12 - 9/25/2011 10:02 AM   
Boomerang1



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Just got back from a jet fly in at Temora Aviation Museum.

A surprise was the arrival of their CAC Boomerang which put on a bit of an airshow before it landed,
complete with it's distinctive howling sound. - John.

http://www.youtube.com/watch?v=mA7azWmFkGQ&feature=related

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RE: CAC Boomerang 1:4.5 CA-12 - 10/4/2011 6:23 PM   
royal_chris


 

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Finally after cleaning, waxing, polishing the mould was ready for the first coal. I use a white topcoat (polyester), the laminate is done with epoxy. A typical combination we use here.

This is actually my first fiberglass cowl ever I am happy with the result, but there's obviously enough to improve.



Cheers



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RE: CAC Boomerang 1:4.5 CA-12 - 6/30/2012 12:36 PM   
royal_chris


 

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Finally, the cowl attached, color applied and only tiny things missing until maiden. Looks nice with the cowl I think.







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RE: CAC Boomerang 1:4.5 CA-12 - 6/30/2012 3:56 PM   
All Day Dan


 

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Chris, it looks great from here. How did the CG come out? Dan.

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RE: CAC Boomerang 1:4.5 CA-12 - 7/1/2012 12:22 AM   
Boomerang1



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Good to see it finished, looks great!

Good luck with the maiden. - John.

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RE: CAC Boomerang 1:4.5 CA-12 - 9/23/2012 9:17 AM   
royal_chris


 

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GOOD NEWS

The mate who did all the building, has maidened and already had already several flights with the boomerang. It does great (can't wait to see it myself) and he only had a bit of trimming to add. He switched on the engine side to a 3W 80. I will possibly post some more pictures and a short video soon.

WE'RE DONE!




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RE: CAC Boomerang 1:4.5 CA-12 - 9/25/2012 10:02 AM   
BHA59



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Hi Chris. Good to hear the Boomer finally maidened and had several flights. Some more photo's, flying characteristics, and construction detail would be good to see for those of us interested in building the beast.

Any news on when the kit will be available?

Cheers Bruce A

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RE: CAC Boomerang 1:4.5 CA-12 - 10/4/2012 9:21 PM   
royal_chris


 

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Hi Bruce,

thanks for your interest. As for the construction you might read this entire thread, we did a lot of photos and screenshots during both construction and building. My mate ensures, it's a pretty smooth flyer! It's anything else than a beast to fly

I would like to finish the canopy mould first, the "rest" is ready to be shipped. During this built another one was started which is already based on a lot of enhancements. Will keep this updated, as soon as there are news about the kit. Quality first.

The packaging of the entire kit is no problem, but including the cowl is a serious issue I have to think of. There will be a secured way to ship it along.

Christopher



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RE: CAC Boomerang 1:4.5 CA-12 - 1/17/2013 1:41 AM   
BOLTMAN



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Hi Chris,

Great to see a Boomer flying.

Can you please tell us how did the balance work out & how much nose weight did it require?

Thanks

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RE: CAC Boomerang 1:4.5 CA-12 - 1/25/2013 4:53 PM   
royal_chris


 

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Hi,

the prototype has actually no (!) additional lead in the front.

Let's wait for the second one, since the first mate added a lot of cockpit features, but those are all pretty close to the CG. 

I usually draw and chose material from heavy 6mm air-ply (firewall), to 3mm poplar light ply (formers  at the front)  and finally 3mm balsa pieces only (nose to back / heavy to light materials) for the tail. This seems to have paid off. Same for the Aichi and Hurricane (actually drawing).

I have not felt asleep, but lost contact to the guy who used to cut my kits and I actually don't have a lasertable or cnc mill so far.

Christopher



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RE: CAC Boomerang 1:4.5 CA-12 - 2/7/2013 12:08 PM   
BOLTMAN



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Thanks Chris.

Just a couple more questions. What did the weight come out at? And what retracts were used?

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RE: CAC Boomerang 1:4.5 CA-12 - 2/7/2013 12:10 PM   
BOLTMAN



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Thanks Chris.

Just a couple more questions. What did the weight come out at? And what retracts were used?

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RE: CAC Boomerang 1:4.5 CA-12 - 2/19/2013 11:05 AM   
royal_chris


 

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Hi,

I think the weight without cockpit details was about 26lbs (24 calculated before I started), the gear was custom made by the pilot's friend. I will arrange a kit gear, as soon as the release is official. The main issue about that is delivery time, which is usually longer then cutting the kit itself.

There's a handful of gear manufacturers in Germany which are pretty good. My Aichi Val set was also custom made for my kit, I will ask him for the boomer one as well. The boomer struts are bended, this is a serious pricing issue...

Christopher


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All Forums >> RC Airplanes >> Scratch Building, Aircraft Design, 3D/CAD >> RE: CAC Boomerang 1:4.5 CA-12
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