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Cox Engine of The Month
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Jason_WI's

"Cox Pee Wee .020 with 3D printed horseshoe backplate"

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A little something I might need

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Re: A little something I might need

Post  Jason_WI on Thu Sep 13, 2018 9:18 pm

Looks nice. Setup for bladder pressure with a fine thread NVA. The one I have has the pressure tap in the back plate installed. It needs a good cleaning and probably a new back plate gasket.
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Re: A little something I might need

Post  Ken Cook on Thu Sep 13, 2018 9:24 pm

I had several of Larry's original LS tuned engines in my hand last year. I asked him how he made the angle cut so clean and accurate. He told me he uses a Nicholson mill to do that. At first I didn't get it, but then I realized that's the name of the file he used. His engines are most impressive. I never flew my Streaks with the Fox .36X, I used the next gen Mk series engines and WOW! It folded the wing which needed the spar replaced, once I fixed that, the elevator broke from the control resistance, then it tore the nose off. It was always impressive as it would take off dead rich to the point you would have to keep pinching the bladder supply line to keep it running. I had to be quick to get a needle setting due to the engine sucking down 3.5 oz's of fuel before you could get to the handle. About 3/4 around the circle it would take off like a bullet and the engine tone would just ramp up x10.
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Re: A little something I might need

Post  RknRusty on Fri Sep 14, 2018 2:11 am

Ken Cook wrote:       I had several of Larry's original LS tuned engines in my hand last year. I asked him how he made the angle cut so clean and accurate. He told me he uses a Nicholson mill to do that. At first I didn't get it, but then I realized that's the name of the file he used. His engines are most impressive. I never flew my Streaks with the Fox .36X, I used the next gen Mk series engines and WOW! It folded the wing which needed the spar replaced, once I fixed that, the elevator broke from the control resistance, then it tore the nose off. It was always impressive as it would take off dead rich to the point you would have to keep pinching the bladder supply line to keep it running. I had to be quick to get a needle setting due to the engine sucking down 3.5 oz's of fuel before you could get to the handle. About 3/4 around the circle it would take off like a bullet and the engine tone would just ramp up x10.

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Re: A little something I might need

Post  Ken Cook on Fri Sep 14, 2018 5:40 am

They were using pipette bulbs from Ebay and then switched to the pacifier. The pipette bulbs worked well just not long enough. They would fail in just a few flights but they offered very low pressure for the stock Fox needle. They put a tiger needle in yours which pretty much handles all styles used.
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Re: A little something I might need

Post  getback on Fri Sep 14, 2018 9:30 am

That's a Bad a$$ looking and sounding engine there , The diamond shape intake is killer ! WE hope you can get back out there soon to Rusty !! sunny
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Re: A little something I might need

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