Skymaster F-5 - Page 3 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 03-09-2016, 11:23 PM   #21
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Re: Skymaster F-5

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Originally Posted by aquila View Post
Nice, that's how mine is done. If I can ever get the rear fuse to run cool enough I'll actually fly it!
The CARF flash uses "cheater holes" in the bottom of the fuse to allow mor wait flow for the pipe to help with cooling. Maybe something like this will help?

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Old 03-16-2016, 10:22 AM   #22
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Re: Skymaster F-5

Hi Paul,
I added NACA ducts into the bottom hatch to try to help, I've lined the entire back of the fuse with ceramic blanket, it's still hot enough to make the fiberglass soften slightly on the top of the fuse ahead of the nozzles.
It's a Tam pipe, but I really think the pipe is to small, sadly, there is no way you could fit a bigger pipe in there. I've played with the spacing of the turbine to the bellmouth, just don't know what else to do at this point.
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Old 03-16-2016, 02:26 PM   #23
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Re: Skymaster F-5

NACA ducts need the flow of air from your planes forward movement to work, get her flying at speed and I would think it will be fine, just be sure to have area around back of pipe open to allow air to flow, but I am thinking you know this already so I may just be missing something, are these not double wall pipes?
I think both Teds and Jim's planes look sweet, great work, see ya all soon!
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Old 04-13-2016, 11:04 AM   #24
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Re: Skymaster F-5

Hi Jim, I assume you have the skymaster pipe, would you mind measuring the diameter at the bellmouth and the exits for me? I have a Tam pipe and I think the pipe is the cause of my overheating problems.
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Old 04-16-2016, 01:00 PM   #25
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Re: Skymaster F-5

Best I can measure, at the bellmouth it's 3 1/4" (without the bellmouth) and at the exits each one is 2 1/8".

Hope that helps,
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