Engine run time?

oldguy Thu Jan 07, 2016 1:16 pm

This question is for the older fox 15x slant plug engine.Can someone comment on how long a 1 .oz tank would run the engine?I'm new here and I flew some control line in the past, trying to scratch build a combat wing similar to the jr. satan and such.Need to figure out what tank i'm going to use, amount of fuel I will need.
Thanks all for your comments.
Jim

pkrankow Thu Jan 07, 2016 2:17 pm

It has been a while, but for learning a 1 oz tank was what I recall being used on the fox 15. It gave a couple minutes of flight time. The best answer is to bench the engine with the expected prop and fuel and time it.

From the sound of things you plan to enclose the tank in the build.

Phil

TDbandit Thu Jan 07, 2016 2:50 pm

I have a 15x and get around two to two and a half minutes on an ounce. This depends on fuel used, temp, prop and needle setting though. As Phil said its best to bench run the engine and time it, it's best to use the prop you plan on using as well as fuel. Those factors will effect your needle setting and fuel usage. Hope this helps! (Bandit)

oldguy Thu Jan 07, 2016 4:14 pm

pkrankow wrote:It has been a while, but for learning a 1 oz tank was what I recall being used on the fox 15. It gave a couple minutes of flight time. The best answer is to bench the engine with the expected prop and fuel and time it.

From the sound of things you plan to enclose the tank in the build.

Phil

Phil/Bandit thanks for your responses, yes i'm going to try and enclose the tank in the build.I think i want more time than two minutes.And your right, i quess the only real way to know is to run with different amounts and see.
Thanks guys

**RknRusty** Thu Jan 07, 2016 8:48 pm

Hey, Oldguy, welcome to CEF. Glad you found us, and hope you have fun here, this is a great group of interesting and helpful hobbyists.
Rusty

oldguy Thu Jan 07, 2016 10:14 pm

RknRusty wrote:Hey, Oldguy, welcome to CEF. Glad you found us, and hope you have fun here, this is a great group of interesting and helpful hobbyists.
Rusty

Thanks Rusty.

**Cribbs74** Thu Jan 07, 2016 11:05 pm

The Jr. Satan calls for a Veco T23C tank which is a 2oz baffle I believe.

For the 15X That would probably get you 6 or so minutes. Bench testing and actually flying will yield different run times due to the difference in loads.

Welcome to the forum.

**RknRusty** Sun Jan 31, 2016 8:22 pm

Starting with an ounce will be a good idea, if you make it possible to change to a larger tank later. Once you get the hang of flying, an ounce is going to be disappointing, sucking air way before you're finished having fun.

Ladies and gentlemen, the Captain has extinguished the fun light!
Rusty

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