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Post  TDbandit Mon Jul 27, 2015 9:58 pm

Ok now that I had a chance to start inspecting my new additions I chose the Fox .29 with no compression to inspect first since it was lightly gummed it didn't take much to loosen er up and once It was freed I put a plug in it to check things and yup, no compression however it felt a little grainy so I popped off the head first and rather quickly found the problem...

Fox .29....issue Fox_2910
Yup kinda hard to hold compression when you have a hole the size of Texas in the middle..
I looked further into the engine and discovered that the rod, case and crank were nearly spotless, i also looked at the head and found no damage there either (usually the head will be pitted pretty bad if things were flying around in the cylinder) so what this tells me is the damage happened while the engine wasn't running head was loose so maybe the previous owner was trying to UN-seize it by tapping on the top of the piston   which is bad juju to begin with especially with a thin crowned cast iron piston
Anyway you all be the judge..
Fox .29....issue Fox_2911
Sorry for the bad quality..
Oh and the little black bits are pieces of the piston that i found down in the case.
Fox .29....issue Fox_2912
Anyway it clearly appears that it's badly in need of a piston/sleeve kit. I would like to possibly get this engine going and put it on my super clown but from searching on ebay unless the .35 set will work I haven't seen a set for the .29 bummer (Bandit)
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Post  Cribbs74 Mon Jul 27, 2015 10:47 pm

Couple things, unless that picture of the head is misleading, it's missing the cutout relief. for the baffle, also I don't recall the casting for the glow plug extending outwards.

.35 PC sets are available on the Bay or private party. They will swap right in the .29 case.

Ron
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Post  TDbandit Mon Jul 27, 2015 10:57 pm

@Cribbs74 wrote:Couple things, unless that picture of the head is misleading, it's missing the cutout relief. for the baffle, also I don't recall the casting for the glow plug extending outwards.

.35 PC sets are available on the Bay or private party. They will swap right in the .29 case.

Ron
yeah at first glance it threw me off too because the first thing I looked for was the baffle relief and didn't see it so I had to take a closer look and discovered that the head was designed this way. the head is virtually flat with the top of the sleeve and no illusion with the plug either its strange setup.

Ok thanks i'll keep an eye out.
(Bandit)
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Post  Cribbs74 Mon Jul 27, 2015 11:37 pm

So there is no interference when the head is tightened down?
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Post  TDbandit Tue Jul 28, 2015 1:57 am

@Cribbs74 wrote:So there is no interference when the head is tightened down?
Nope not at all and it doesn't care which way you put it either... strange I've never seen anything like it. This has got me curious now.. (The Bandit is puzzled)
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Post  Oldenginerod Tue Jul 28, 2015 3:42 am

Maybe someone screwed in one of those piston stop tools that the R/C car guys use when fitting clutches. Huh...
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Post  getback Tue Jul 28, 2015 9:05 am

I don't think that is the correct head for that engine ?/ If the piston is not moving there will be no interference ? / I have a 19 but not a 29 I don't think I would have to look some more < but I don't see were it could before with out the relief , I relieze this is not the same engine but the other 29 >1 on home page don't show the head inner or piston http://sceptreflight.net/Model%20Engine%20Tests/Fox%2029%20(2).html ... http://sceptreflight.net/Model%20Engine%20Tests/Fox%2029%20(1).html ??
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Post  GWILLIEFOX Tue Jul 28, 2015 11:25 am

@TDbandit wrote:
@Cribbs74 wrote:Couple things, unless that picture of the head is misleading, it's missing the cutout relief. for the baffle, also I don't recall the casting for the glow plug extending outwards.

.35 PC sets are available on the Bay or private party. They will swap right in the .29 case.

Ron
yeah at first glance it threw me off too because the first thing I looked for was the baffle relief and didn't see it so I had to take a closer look and discovered that the head was designed this way. the head is virtually flat with the top of the sleeve and no illusion with the plug either its  strange setup.

Ok thanks i'll keep an eye out.
(Bandit)
You have an early version of the stunt 29. There is nothing wrong with the head; it was designed that way. If you look very close, you may see a little oval that says inside "ranger"; that is the company who did the casting for Fox. Look a little closer and you'll see little "cusps" on the bottom. These go at the 3-9 position; if the head fins are in the right direction, the orientation will be correct. The head were made like this until about 1954 when the newer style with the groove for the baffle was used. Some stunt fliers prefer the older head. A 35 piston and liner will fit right in, but you'll need the 35 wrist pin, too. All the other parts are the same.
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Post  TDbandit Tue Jul 28, 2015 1:07 pm

@GWILLIEFOX wrote:
You have an early version of the stunt 29.  There is nothing wrong with the head; it was designed that way.  If you look very close, you may see a little oval that says inside "ranger"; that is the company who did the casting for Fox.  Look a little closer and you'll see little "cusps" on the bottom.  These go at the 3-9 position; if the head fins are in the right direction, the orientation will be correct.  The head were made like this until about 1954 when the newer style with the groove for the baffle was used.  Some stunt fliers prefer the older head.  A 35 piston and liner will fit right in, but you'll need the 35 wrist pin, too.  All the other parts are the same.
Interesting, outside the P/C set, the engine is in great condition and after closely inspecting the combustion chamber side of the head you are correct it has "Ranger" inside an oval cast into the chamber face, cool! Makes me want to find a .29 P/C set to bring it up to original configuration. The pin is fine too and I think Rod hit the nail on the head with the comment about the piston stop. The damage sure looks like what those dang tools cause, I hate those things, with nitro cars, there's a such thing as a "Flywheel wrench" The only engines that the piston stops are really needed for are the Heli engines since there are no shoe pegs for the wrench to grab and you still need to be careful and even now they have a bolt on wrench for that!
Have you seen any .29 P/C set show up? Or have they all about dried up by now?
(Bandit)
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Post  roddie Tue Jul 28, 2015 6:08 pm

Geez... makes me wonder now about my Fox .29 Stunt... I got it for $5.00 castor-seized in a paper bag about 25 years ago.. with a broken needle. I removed the plug and solvent-soaked it.. which freed it right up. The compression is very good.. and I have never ran it. I sourced a NOS needle for it soon after I bought it... so it should be a runner.

I don't know what year the engine is though. It looks absolutely identical to my .35 stunt.. (don't know what year that one is either..) The .29's a little heavier than the .35 because of the thicker sleeve/smaller bore.

Are there any external markings to distinguish a pre 1954 non-baffled .29 Stunt? Did the .35 Stunt see this design change as well?

My .29 Stunt
Fox .29....issue Dsc02310

My .35 Stunt... note the differing tapers between the two needles... (Ken C. will tell you how much he loves Fox needles.. Laughing )
Fox .29....issue Dsc02311

My Fox line-up
Fox .29....issue My_fox10
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Post  GWILLIEFOX Tue Jul 28, 2015 8:59 pm

http://www.clstunt.com/htdocs/dc/dcboard.php?az=show_topic&forum=103&topic_id=323889&mesg_id=323889&listing_type=search

This should clear things up.  The 29s were identical to the 35 but for the piston, cylinder liner, and wrist pin.  The last stunt 29 was made in 1958.

Oh, there was also a 2008 60th anniversary, looked just like the 1998 50th. And the 1988 was the 40th.
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Post  TDbandit Tue Jul 28, 2015 10:06 pm

@GWILLIEFOX wrote:http://www.clstunt.com/htdocs/dc/dcboard.php?az=show_topic&forum=103&topic_id=323889&mesg_id=323889&listing_type=search

This should clear things up.  The 29s were identical to the 35 but for the piston, cylinder liner, and wrist pin.  The last stunt 29 was made in 1958.

Oh, there was also a 2008 60th anniversary, looked just like the 1998 50th.  And the 1988 was the 40th.
Cool thanks! this clears up alot of ID questions that I had.
Now off to find parts if I find them. (Bandit)
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Post  GWILLIEFOX Wed Jul 29, 2015 4:19 am

They are out there, keep looking
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Post  cox24711 Wed Jul 29, 2015 5:54 am

@GWILLIEFOX wrote:They are out there, keep looking
whats wrong with a 35piston and bore in a .29 ? if you can't find a 29 bore and piston kit why not ?
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Post  TDbandit Wed Jul 29, 2015 12:17 pm

I just like trying to keep things origional but if I'm only able to get a .35 P/C set then thats what I will do. I'm just trying to find a .29 set first due to the fact that besides the P/C set the rest of the engine is in wonderful shape, crank looks nearly brand new.
(Bandit)
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Post  Ken Cook Wed Jul 29, 2015 3:16 pm

Fox was always good at keeping older parts in stock. Certainly, it's worth a shot in the dark. Unfortunately, the company ended abruptly last year producing engines and part supplies diminished very quickly. I highly doubt regardless of the e-mail posted from them that we will ever see another engine produced from them. Calling them though in search of the .29 parts would be my first choice. However, your going to pay more for that piston liner if they have it than what the engine is worth. That's the problem with EBAY and exactly what happened with the Cox surge is happening with Fox items. I see many selling Fox .35's and .29's at swap meets and the reality is they can't give the stuff away. Last November though Fox prices were higher than I ever saw them. They're fun to play with but when you have to worry about parts support, that can be a problem.
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Post  Jason_WI Wed Jul 29, 2015 3:39 pm

Fox should sell the engine line to MECOA. At least then some parts might be available.
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Post  GWILLIEFOX Wed Jul 29, 2015 4:29 pm

Randy doesn't make many new parts with few exceptions.
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Post  Jason_WI Wed Jul 29, 2015 5:11 pm

Thats why I stated some parts. I know the engine portion of his business is secondary just as Fox was.
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