Fox .10

[Ron Cribbs]

Ok guys,

I put a Fox .10 on a Jr. Ringmaster for my son. I have gone from 7x4 to 6x3 and between. This engine is a dog. Anybody have a suggestion as to what prop I should use for this.

It keeps tension on the lines, but I have to keep the lines under 40ft to keep it out there. Engine is in good shape with good compression. I am beginning to think I made the wrong choice....

Ron

[Dane Martin]

Ron, is that a rocket .10? with steel fins? if so.... yeah, it's a dog! lol. everyone says the Cox .049 engines are stronger. i don't know if that's a joke, but you never know. a Cox .09 will smoke that .10 , i know that.

[Jim Kraft]

I ran a Fox 15 slant plug on my Jr. Ring and it flew it fine with an 8-4 Top Flite prop. A modern .10 might fly it OK, but a good 15 would be my choice. I flew mine on 52' lines.

[wwwarbird]

 Swap it for an LA.15 and be done with it.

[Dane Martin]

I ran a Fox 15 slant plug on my Jr. Ring and it flew it fine with an 8-4 Top Flite prop. A modern .10 might fly it OK, but a good 15 would be my choice. I flew mine on 52' lines.

the slant plug is the 15x. that is a power house compared to the .10 and .15 fox rockets. I'd say the .15x was better than the .19 from fox. i have them on different planes, but i could swear the 15x is a better run. 

[Ron Cribbs]

The engine is akin to the Hustler .10

There is a reason I am wanting a less powerful engine on it is back yard area will only support a 45' of line length. I was afraid a .15x would be too much on 45' and it balanced way nose heavy when I mounted it. The Fox .10 balanced fine.

I have Cox .09's and .15's but again I know they would overpower it on 45'  an LA would rip the wings off, not to mention we would be back to nose heavy.

An .09 Medallion may work but, major surgery would be required to narrow the beams.

I was hoping to be able to prop it for more oomph.

Thanks for the help gentlemen.

[Dane Martin]

this is my opinion, but i would run more pitch than you would normally run. on that set up, I'd try a 7x6. you don't want more diameter, cuz there's not a lot of torque on reserve. but you need more pitch, cuz it's a low revving engine. maybe even cut down a 8x6 to a 7x6 so its wider.  i dont think i'd give up on that engine, though.

[Jim Kraft]

I believe Dane is correct. I would try a 7-6 prop and go from there.

[Ron Cribbs]

Ok,

And the verdict is..... The Fox .10 is a POS.

Anything above a 7x4 loads that engine way down and 6" props keep the revs up, but I have no thrust. Might make a good hand toss FF engine, but beyond that it's useless. It's going back in the drawer and I am going to re-space the bearers and install a Medallion .09.

[Motorman]

OS makes an LA .10. If the Cox .09 is too fast you can always put the prop on backwards.


MM

[Ron Cribbs]

OS makes an LA .10. If the Cox .09 is too fast you can always put the prop on backwards.


MM

Yeah, I bet the OS has more juice than the Cox. If line length wasn't an issue this would be a no brainer. I'll try the medallion and see.

Ron

[Tim Wescott]

Yeah, I bet the OS has more juice than the Cox. If line length wasn't an issue this would be a no brainer. I'll try the medallion and see.

Use the LA .10.  It comes with an RC carb, so make a throttle rod with a clip to hold it in place.  Then adjust the throttle to whatever flies the plane nicely.

If you're just bound and determined to use the .10 with a venturi, either shove wooden plugs into the thing until you get the speed you want, or pile up layers of pantyhose on the inlet until you get the speed you want.

[afml]

Surprised no one has mentioned an Enya .09.

"Tight Lines!"
Wes

[Jim Thomerson]

I did some experimenting with a Medallion 09. Additional washers under the glow head will tame it down. I friend has an LA 10 on a Jr.  Flite Streak.  It flies pretty well on fairly short lines.  Sorry, don't know exactly how long.