aspeed

If you can separate the muffler at all, you can put in a baffle made from an aluminum pie plate with a few 1/8" holes punched in. Gets the same effect, and saves advertising and postage. The stainless steel scouring pads from the dollar store might work ok too. It might need replacing if a lot of castor is used and it clogs. I put it in my lawn mower and it takes some of the bark out.

Hobbsy

My Feedback: (102)

I have a Quiet muffler, but it is a tilt up, PM me if interested, Thanks, Dave

carddfann

Thanks, but I prefer tilt down.

Hobbsy

My Feedback: (102)

I know what you mean, the other muffler in the picture is the .60/.74 size and is also a tilt up. They only work well in a side mounted setting.

fujiman

My Feedback: (133)

pm me and we'll talk. some new some used.

hsukaria

thanks fujiman, I will try to make my around to it soon. I have been going crazy with finishing a couple of projects.

Hobbsy

My Feedback: (102)

Fox .25 and Sig LT 25 flying Saturday.

hsukaria

Sounds like a good plan!!

Sport_Pilot

Is the Fox .25 a smooth runner? Some iron piston engine's vibrate a lot.

Hobbsy

My Feedback: (102)

Yes sir, it is smooth.

hsukaria

I only ran my 2 40 lapped iron piston engines on the bench, but they both did not feel rough at all.

Sport_Pilot

I recall the Fox Stunt .35 being a bit rough. But that was mostly when it was four stroking, and the transition to two stroke. Not so bad when in the two stroke mode.

JPMacG

My Feedback: (2)

Here is my Ultra Sport 60 with a Fox 74 using Hobbsy's Fox Quiet Muffler. The muffler fits perfectly.

hsukaria

Beauty!!! I have an Ultra Sport 40 and tried to put a non-stock muffler on it and it won't fit due to interference with the fuselage. Looks like in your case the longer muffler fit because it is a tilt-up

earlwb

It is looking good there JPMacG. That looks like a great setup to me. I think you will have lots of fun with it too.

hsukaria

Is that a Fox Eagle 4 60 or a 74?

earlwb

huskaria, I think your eyes are playing tricks on you. He did state that it was a Fox 74 engine.

hsukaria

Well, I'll be dipped!!! I am actually about to have eye surgery soon, but it isn't that bad. I was analyzing some data at the same time and totally missed that.

That is encouraging to hear about the 74 since I have a 74 not being used presently. That has got me thinking....

Hobbsy

My Feedback: (102)

Fox friends, Earl has been discussing a screw in prop stud on an MVVS .77 elsewhere, I discovered quite by accident yesterday that my Fox .25 has a screwed in stud. A Harry Higley prop nut bottomed out before it tightened the prop and when I was removing the prop nut the stud came out with it. Who'da thunk it?

Hobbsy

My Feedback: (102)

HS, you'll love the .74 when you use it. I mostly learned to fly with one on a Tower Trainer 60 RTC.

hsukaria

I didn't know Fox had those, but Norvel (NV Engines) and one of my Irvine 40's has it. It is interesting that I have 2 identical model Irvine 40's, but only one of them has the screw-in prop shaft.

Hobbsy

My Feedback: (102)

That would be the Irvine .40 with the 9 or 10mm shoulder, I'm guessing.

hsukaria

I bought mine used a while back and had some growing pains with it. But I finally got it running right after learning a few tricks and changing the head button and adding a couple of head shims. I still run 5% nitro, but it seemed to overheat before the change. Mine is an older build that had the extremely high compression.

I had been considering a classic pattern plane like the one shown above but I accidentally stumbled on an Ultra Sport 40 already built and very attractively priced. But I will keep my eyes open for a 60-size pattern ship.

hsukaria

I didn't measure it, but you have to ream out the prop quite a bit to fit on that engine. Once reamed out, it won't fit any other engine I own.

spaceworm

The K&B 40 and 61 had prop studs that screwed in. I will have to check to see if the K&B 65 Sportster or the HB 61 I have are the same or not.

A Fox 35 was the second large engine I ever bought back in '53 or '54. The first was K&B 29 Green head. Both CL of course. I still have both of them.

Sincerely, Richard