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RE: Club FOX! - 5/7/2012 3:10 PM   
hsukaria


 

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Status: offline 		Thanks Earl. I am going to compare them tonight. I have it in the crockpot with other engine parts getting a bath. I already ordered a new head button from Fox.

I got a message from Konrad about checking if the crankshaft has shifted back and caused rubbing against the backplate. Is that something I can fix by just making sure that the crankshaft is pushed forward all the way? (this may be considered a dumb question!!)

I noticed Fox is having a SUPER SALE on their engines, besides the reduced prices, now you get free shipping and 3 free glow plugs included. Was tempted to swap my old .74 for a shiny new one instead of buying the head button. As it is, the propeller hub/collar keep coming off when I remove the propeller.

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RE: Club FOX! - 5/7/2012 3:17 PM   
hsukaria


 

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ORIGINAL: earlwb

huskaria, way back at post number 1063  ( ref http://www.rcuniverse.com/forum/m_3354294/anchors_10011460/mpage_43/key_/anchor/tm.htm#10011460 )
Hobbsy posted a pic of some different head button combustion chamber shapes that were used on some of the Fox engines.

quote:

Here is picture of a few Fox .74 head buttons

Button #1 on the left is an early Fox button up close it has steeper sides than the others and the squish band is tapered inward.
Button #2 is the AJC button and has less steep sides and the squish band is flat.
Button #3 is the latest button from Fox has a combustion chamber about the same shape as AJs but the squish band is narrower but still flat indicationg the combustion chamber is a larger diameter possibly to reduce compression. The buttons in the back are identical to the one on the right.





You know, it would seem that the head button I have is more like the new one than the old one. I have to check it and verify later tonight. If I had the new type all along, then something else must be wrong with the engine. Time to do some digging.

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RE: Club FOX! - 5/7/2012 3:46 PM   
earlwb


 

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Status: offline 		If the drive washer and collet are worn down some, they have a tendency to not stay on when you take the prop off.
Yes if the crankshaft had been pushed back a little bit, then heating up the crankcase and reseating it works. This sometimes happens when a engine hit on the nose in a hard landing. The engine is hot and expanded and when it hits just right on the nose it can be pushed back slightly up against the back of the drive washer.

Fox actually had several head button combustion chamber shapes and designs. So you could have something similar or just like what the pics show.



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RE: Club FOX! - 5/7/2012 3:58 PM   
hsukaria


 

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Status: offline 		I have not had a crash with this engine (yet) since I replaced the bearings last year. The only possibility is that I did not push the crankshaft all the way forward when I replaced the bearings? I will check that also. This is the first and only engine that I ever replaced bearings on. So, I'm making all my learning mistakes on it. Poor engine!!!

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RE: Club FOX! - 5/14/2012 5:26 AM   
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Status: offline 		folded my wing today, well "yesterday....." killed my decades old fox 46bb. man, I, I LOVED that engine.... (

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RE: Club FOX! - 5/14/2012 1:02 PM   
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quote:

ORIGINAL: Timmer01

folded my wing today, well "yesterday....." killed my decades old fox 46bb. man, I, I LOVED that engine.... (



Send it to Fox and get a 50% discount on a new Fox 46bb.

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RE: Club FOX! - 5/14/2012 4:45 PM   
hsukaria


 

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quote:

ORIGINAL: Sport_Pilot


quote:

ORIGINAL: Timmer01

folded my wing today, well ''yesterday.....'' killed my decades old fox 46bb. man, I, I LOVED that engine.... (



Send it to Fox and get a 50% discount on a new Fox 46bb.

You might want to ask about the 50bb. I got their paper catalog with my head button order and the 50bb was listed. But somebody here said it was sold out. I thought I saw the 46 crossed out of the catalog. So you might want to check anyway.

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RE: Club FOX! - 5/14/2012 6:42 PM   
Sport_Pilot



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Status: offline 		Does anybody have a recent catalog they can scan?

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RE: Club FOX! - 5/14/2012 6:54 PM   
hsukaria


 

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ORIGINAL: Sport_Pilot

Does anybody have a recent catalog they can scan?

It is confusing. I got a stack of sheets, some of the items were repeated in two documents. So, I could try to scan, but I might end up providing contradicting info. I'll try later tonight if somebody doesn't get to it first.

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RE: Club FOX! - 5/14/2012 7:24 PM   
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Status: offline 		They could very well be sold out of a particular engine. But they'll likely be making up a new batch of them later. They tend to make production runs of each model of a engine in batches during the year. They run off a batch of 15 engines, then 25 engines, then 40 engines and 45 engines, and so on. Then the cycle repeats again. Sometimes a particular engine sells out faster than they expected.



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RE: Club FOX! - 5/14/2012 7:28 PM   
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Status: offline 		Best bet is to give them a call and see what they actually have in stock.

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RE: Club FOX! - 5/17/2012 3:40 AM   
1QwkSport2.5r



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Status: online 		I'm going for broke with my Fox .40 that seemingly eats any wristpin clips I put in it.. I talk about it in the video, but I used hardened steel c-clips that fit very tightly in the groove in the piston. I then JB Welded the clips in place. 12oz of fuel later and it still has compression and runs.. Hoping it heals itself enough to run good for me.

Short video of the second run after the "final" repair... Very rich running, keeping it as cool as possible. The needle is out all the way. I could pull the needle out and plug the hole and the engine will still run. Kinda nutty..

Anyway, here's the video. Don't mind me blabbing away..
http://www.youtube.com/watch?v=71BiTVleHik
Here's my back yard after the first 6oz of fuel.. Hoping to keep the bugs away.


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RE: Club FOX! - 5/17/2012 4:10 AM   
Cougar429


 

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Status: offline 		Love the muffler extension, but it might be a little hard dragging that barrel in the air .

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RE: Club FOX! - 5/17/2012 4:33 AM   
1QwkSport2.5r



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quote:

ORIGINAL: Cougar429

Love the muffler extension, but it might be a little hard dragging that barrel in the air .

Yeah, I don't think it's all that aerodynamic. Maybe I'll add a vertical stabilizer and some flapperons. Lol.

The muffler bucket is training wheels. I'm trying to teach my engines noise manners early on, but they never listen.
When she is ready to run close to peak mixture, the bucket comes off. The TT pro muffler is much quieter than my Jettstream. I'm not using the fox muffler because it won't fit my test stand, which is fine by me. The fox muffler is teeny and loud.

P.S. the bugs returned 10 minutes after the smoke cleared. Go figure.

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RE: Club FOX! - 5/17/2012 12:17 PM   
earlwb


 

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Status: offline 		1QwkSprt2.5r,
Not a bad idea making a flying barrel.
They already made and flew a flying barrel way back in the early 1930's.
The Italian Caproni Stipa.
http://en.wikipedia.org/wiki/Stipa-Caproni








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RE: Club FOX! - 5/17/2012 9:17 PM   
hsukaria


 

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Status: offline 		It's nice that you can test run your engine in your own yard. I would get in trouble in my neighborhood. I have to go the flying club with a portable test stand to bench run my engines.

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RE: Club FOX! - 5/17/2012 9:47 PM   
earlwb


 

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Status: offline 		What makes the model engine more worse than running a trimmer or lawn mower or leaf blower at home?


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RE: Club FOX! - 5/17/2012 10:11 PM   
Cougar429


 

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Status: offline 		How true. We lost one of our fields due to noise, (sad as it was only 3 minutes from home and had a large pond). What makes it extremely frustrating is everyone uses the area for 4-wheeling and dirt bikes.

earlwb, next to the Transavia PL-12 Airtruk that has to be one of the ugliest flying creations ever:

http://en.wikipedia.org/wiki/Transavia_PL-12_Airtruk

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RE: Club FOX! - 5/18/2012 1:02 AM   
hsukaria


 

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quote:

ORIGINAL: earlwb

What makes the model engine more worse than running a trimmer or lawn mower or leaf blower at home?


the loudest noise makers are the power equipment that professional lawncare guys use. Their trimmers, leafblowers, and mowers are louder than anything else. I think that people would complain about model engines because they are toys. Besides, I would run the engines longer than yardcare tools run for. But my leafblower has a super powerful gasser in it, also very loud.

The only time I felt ok running an engine was a small .52 4-stroke running at part throttle INSIDE THE GARAGE!!!



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RE: Club FOX! - 5/18/2012 1:05 AM   
hsukaria


 

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How true. We lost one of our fields due to noise, (sad as it was only 3 minutes from home and had a large pond). What makes it extremely frustrating is everyone uses the area for 4-wheeling and dirt bikes.

earlwb, next to the Transavia PL-12 Airtruk that has to be one of the ugliest flying creations ever:

http://en.wikipedia.org/wiki/Transavia_PL-12_Airtruk

that would make an interesting scale model.

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RE: Club FOX! - 5/18/2012 3:10 AM   
earlwb


 

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quote:

ORIGINAL: Cougar429
earlwb, next to the Transavia PL-12 Airtruk that has to be one of the ugliest flying creations ever:

http://en.wikipedia.org/wiki/Transavia_PL-12_Airtruk


The Caproni Stipa was a early example of a ducted fan engine. The precursor to all of our ducted fan jet planes.
They experimented with having a more controlled and direct airflow. But at the time it didn't occur to them to use a smaller diameter multi-blade rotor like you we in our modern ducted fan planes. It actually flew really well, and the test pilots were amazed with its STOL capabilities. Unfortunately it had too much drag to fly fast but was great at lower speeds.

There were uglier airplanes, It didn't make the list which is interesting.
http://www.historynet.com/the-13-ugliest-airplanes.htm?pid=1110




< Message edited by earlwb -- 5/18/2012 12:29 PM >

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RE: Club FOX! - 5/18/2012 2:07 PM   
hsukaria


 

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quote:

ORIGINAL: earlwb

quote:

ORIGINAL: Cougar429
earlwb, next to the Transavia PL-12 Airtruk that has to be one of the ugliest flying creations ever:

http://en.wikipedia.org/wiki/Transavia_PL-12_Airtruk


The Caproni Stipa was a early example of a ducted fan engine. The precursor to all of our ducted fan jet planes.
They experimented with having a more controlled and direct airflow. But at the time it didn't occur to them to use a smaller diameter multi-blade rotor like you we in our modern ducted fan planes. It actually flew really well, and the test pilots were amazed with its STOL capabilities. Unfortunately it had too much drag to fly fast but was great at lower speeds.

There were uglier airplanes, It didn't make the list which is interesting.
http://www.historynet.com/the-13-ugliest-airplanes.htm?pid=1110




Looking at the Stipa-Caproni tail, the airflow from the prop is directed right at the rudder and elevator. That helps make the control surfaces work even when the plane is not moving, unike jets or narrow ducted fans that do not blow the fan air at the control surfaces.

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RE: Club FOX! - 5/19/2012 1:48 AM   
Live Wire


 

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Status: offline 		Any one know the size and year of this engine? More information! .40 size range, button head ringed and rear exhaust.

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< Message edited by Live Wire -- 5/19/2012 3:32 AM >

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RE: Club FOX! - 5/19/2012 3:29 AM   
earlwb


 

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quote:

I think the 36 RX was the special engine Lou Crane mentioned in the Fox 45 Stunt thread. This engine was Fox's attempt to jump start his schnuerle experience. He bought the design and a lot of parts from Roselle and Fry (hence the RAF designation used sometimes).

The first ad I've ever seen was in the April 1976 MAN (reproduced here). There were versions for CL stunt (lapped, bushed, suction), Free Flight (ringed, BB, pressure), Profile Carrier Special (ringed, bushed 5A throttle), and RC (ringed, BB, throttle). The engines weren't very successful. In 1980, Fox re-introduced the engine as an RC only version (ringed, bushed, 36 style throttle)with a unique "between the mounts" muffler. It wasn't very successful either. The earlier engines (stunt) may have been sold overseas with the muffler; may one of our British friends can comment.

You could special order one of these engines from Fox with ANY combination of parts. The BB versions had a single rear BB and had a "B" stamped on the lower right corner of the front housing. The 1976 bushed engines had meehanite crank bushings; the 1980 version had a bronze bushing. You can find these with "FOX" cast on either the right or left bypass!

My Free Flight Spl weighs 10.2 oz and is 2 3/8" from the rear mount hole to the drive washer compared to 8.9 oz and 2" for the Mark III CS.

Seems like the real use for these engines is to keep us collectors looking

Bill Mohrbacher
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RE: Club FOX! - 5/19/2012 2:08 PM   
Live Wire


 

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Status: offline 		I thank you for your reply. I must be getting old. I am the one that sold this engine back in the mid 70's.when I had the LHS and got it back with a few other engines when the mans health went bad
thanks again
Larry K

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