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Old 07-30-2020, 04:04 PM   #1
Owen Penk
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Propane/Butane start fuel


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Hi Folks. Iím just getting my feet wet with a used JetCat 80 in BVM Sabre setup.
Jetcat manual dictates Coleman Powermax or a 60/40 blend of Propane/Butane for the initial propane start. Iím finding these canisters hard to obtain. If anybody knows where I can buy same, please let me know.
Thanks,
Owen Penk
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Old 07-30-2020, 04:52 PM   #2
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Re: Propane/Butane start fuel

Not sure what you have for the adapter off of the gas can but I use the small canister's of propane/butane mix used in small backpackers stoves and the ratio is not all that important. The butane mixed with propane allows a thinner walled can as it lowers the pressure of the mix. Available just about anywhere . Works just fine, even the straight
green can propane for small BBQ's and other heaters.
Here is a picture of my setup I use with a Wren44 turboprop. The valve is from a small pack packers stove . Not held hostage
and readily available.

JetCats recommendation was probably for way back when the Coleman stuff was readily available.
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Old 07-30-2020, 05:19 PM   #3
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Re: Propane/Butane start fuel

Another option , can from CT,
Fits a badger air connect perfect, also this makes it very easy to manually feed.
The top needle works perfect to regulate the gas
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Old 07-30-2020, 08:00 PM   #4
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Re: Propane/Butane start fuel

Quote:
Originally Posted by Owen Penk View Post
Hi Folks. Iím just getting my feet wet with a used JetCat 80 in BVM Sabre setup.
Jetcat manual dictates Coleman Powermax or a 60/40 blend of Propane/Butane for the initial propane start. Iím finding these canisters hard to obtain. If anybody knows where I can buy same, please let me know.
Thanks,
Owen Penk
Straight propane (coleman green bottles) actually works better than powermax in most cases. It does require a pressure regulator though.....
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Old 07-31-2020, 12:29 AM   #5
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Re: Propane/Butane start fuel

But check the label on my can. Certified for jet use...LOL
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Old 07-31-2020, 07:02 AM   #6
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Re: Propane/Butane start fuel

Owen

As others have mentioned get your self a minipropane bottle ( Coleman etc ) and a regulator. Also place a filter in the propane line as well. Propane is dirty and can plug up the injector over time. Plug the propane line into a ONE WAY festo connected via another piece of tubing to the in port of the festo on the engine. This will prevent blow back once the engine starts running. Its not dangerous - just looks odd with vapors coming out of the line.

-PLACE THE AIRCRAFT WITH THE NOSE INTO THE WIND
- The procedure to start the JetCat via propane only - IS TO HOOK UP THE LINE DIRECTLY TO THE ENGINE PROPANE FESTO. Initiate the start sequence, as soon as glow on comes on then crack open the bottle and SLOWLY increase the flow. You will hear a POOF. Turn the valve a bit more at that point and allow the temperature to build up. Once the temp hits around 250 - 300 and the engine is accelerating you can start to turn off the propane. DO not use any solonoid valves with propane as the pressure will damage them.

Have fun

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Old 07-31-2020, 02:36 PM   #7
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Re: Propane/Butane start fuel

Hey Dean,
I have always used propane solenoid with my Jetcats, , never a problem.
Remember we used to have onboard gas, with solenoid controlling it.
Or external works fine like you said with just the one way valve.
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Old 07-31-2020, 08:59 PM   #8
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Re: Propane/Butane start fuel

Wow....well there you go they can be used!

During the JetCat rep course we were instructed to only use the powermax blend for the onboard canisters and solonoids. We were told not to use straight propane because the pressure would damage the solonoids. Now these were big bulky black things. Perhaps with time they improved upon them. I never tried myself..just did what I was instructed to do.....but ....good to know, thanks.

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Old 08-01-2020, 09:18 AM   #9
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Re: Propane/Butane start fuel

I use a solenoid shutoff on my Wren 44 TP but then only use the mIx as that is at a much lower pressure than straight propane. All interesting points.
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