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Cox Engine of The Month
July-2024
robot797's
"ULTIMITE COX 010: it has a clutch, E starter, throttle, exhaust, aluminum tank, aluminum venturi, gearbox with forward and reverse, and now its on a custom drawn and printed stand"
PAST WINNERS
robot797's
"ULTIMITE COX 010: it has a clutch, E starter, throttle, exhaust, aluminum tank, aluminum venturi, gearbox with forward and reverse, and now its on a custom drawn and printed stand"
PAST WINNERS
Difference?
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Scotland421- Silver Member
- Posts : 82
Join date : 2021-03-07
Re: Difference?
Wall thickness maybe, but hard to tell from the picture.
Cribbs74- Moderator
-
Posts : 11904
Join date : 2011-10-24
Age : 50
Location : Tuttle, OK
Fledgling
Ummmm, one is red?
The black one has no pressure stub and is shaped around Venturi inner area, what size engine ?
Any ones if these plastic ones for td09's yet anywhere ?
The black one has no pressure stub and is shaped around Venturi inner area, what size engine ?
Any ones if these plastic ones for td09's yet anywhere ?
Coxfledgling- Gold Member
- Posts : 375
Join date : 2021-01-10
Location : Near Caernarfon, Snowdonia, Wales, UK
Re: Difference?
The red aluminum mount has no inner shoulder that keys it to the crankcase. It has to be tightened tightly to prevent it from moving
coxaddict- Gold Member
- Posts : 429
Join date : 2013-01-27
Location : north shore oahu, Hawaii
Re: Difference?
coxaddict wrote:The red aluminum mount has no inner shoulder that keys it to the crankcase. It has to be tightened tightly to prevent it from moving
Exactly. but wi a new engine and tightening the collar enough tae keep the venturi body frae spinning, the crank case distorts and the engine produces black oil. I checked all the parts on a surface plate and a vernier height guage and all dimensions are perfect. Needs an indexing shoulder, otherwise the product is useless...I had one flight on a GLH and the venturi body collar spun out and the engine locked up solid. Cox always warned against torquing engine parts too tight as the tolerances were in the millionths of an inch and the danger of distortion.
Scotland421- Silver Member
- Posts : 82
Join date : 2021-03-07
Re: Difference?
If i am not mistaken , there is a O-ring that works with the red alum. body . This will keep it from rotating , want it ? I have seen them in kits before i have one somewhere ! From CI it says > For best fit use a bit of silicone or equivalent when installing< It's a thin metric O-ring
getback- Top Poster
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Posts : 10280
Join date : 2013-01-18
Age : 66
Location : julian , NC
Scotland421- Silver Member
- Posts : 82
Join date : 2021-03-07
Re: Difference?
I want disagree with you on that , i am Not a fan of them.
getback- Top Poster
-
Posts : 10280
Join date : 2013-01-18
Age : 66
Location : julian , NC
Re: Difference?
Scotland421 wrote:coxaddict wrote:The red aluminum mount has no inner shoulder that keys it to the crankcase. It has to be tightened tightly to prevent it from moving
Exactly. but wi a new engine and tightening the collar enough tae keep the venturi body frae spinning, the crank case distorts and the engine produces black oil. I checked all the parts on a surface plate and a vernier height guage and all dimensions are perfect. Needs an indexing shoulder, otherwise the product is useless...I had one flight on a GLH and the venturi body collar spun out and the engine locked up solid. Cox always warned against torquing engine parts too tight as the tolerances were in the millionths of an inch and the danger of distortion.
Why tightening collar distort crank case? Is it possible?
Levent Suberk- Diamond Member
- Posts : 2228
Join date : 2017-12-24
Location : Türkiye
Re: Difference?
With fits and tolerances in the microns...aye. Mine produced clear oily exhaust wi the Delrin one. Black oily exhaust wi the aluminum oneLevent Suberk wrote:Scotland421 wrote:coxaddict wrote:The red aluminum mount has no inner shoulder that keys it to the crankcase. It has to be tightened tightly to prevent it from moving
Exactly. but wi a new engine and tightening the collar enough tae keep the venturi body frae spinning, the crank case distorts and the engine produces black oil. I checked all the parts on a surface plate and a vernier height guage and all dimensions are perfect. Needs an indexing shoulder, otherwise the product is useless...I had one flight on a GLH and the venturi body collar spun out and the engine locked up solid. Cox always warned against torquing engine parts too tight as the tolerances were in the millionths of an inch and the danger of distortion.
Why tightening collar distort crank case? Is it possible?
Scotland421- Silver Member
- Posts : 82
Join date : 2021-03-07
Re: Difference?
I didn't use aluminum carb body but it seems impossible to me, because collar and carb body are against crank case front. I think that it is impossible to distort crankcase when you apply force against crankcase front, but crankcase sides. Perhaps I think wrong, don't know too much about it.
Levent Suberk- Diamond Member
- Posts : 2228
Join date : 2017-12-24
Location : Türkiye
Re: Difference?
Just think of it this way...black oil emission is aluminum wear.
Scotland421- Silver Member
- Posts : 82
Join date : 2021-03-07
Re: Difference?
love use this parts look Good But much more in fact this piece increases the internal volume of the crank chaft induction portion is changed certain rule must be followed firstly use celicone it is not enough use gasket maker like that gray moto seal from permatex wil hold very solid Don't over tighten
Make sure that the part is sealed no leak work Good A little difficult to install of course on the original does not need gasket But more fragile
Make sure that the part is sealed no leak work Good A little difficult to install of course on the original does not need gasket But more fragile
davidll1984- Diamond Member
- Posts : 2303
Join date : 2020-02-12
Age : 39
Location : shawinigan
Re: Difference?
It seems that both styles, Aluminum and Plastic, have their problems. Plastic can split, Aluminum has trouble sealing. Seems like you choose which you want to deal with.
1Bad67- Moderate Poster
- Posts : 12
Join date : 2021-04-27
Age : 57
Location : Portland Oregon
Re: Difference?
Regarding tolerances, that only applies to the piston to cylinder fit. The rest of the engine is very normal in fits and tolerance. It should be expected that the crankcase bends when the nose collar is tightened due to the cutout in the case. How much bend (torque on the collar) is acceptable will depend on how tight the crank fits the case.
gkamysz- Gold Member
- Posts : 390
Join date : 2018-02-22
Location : Chicagoland
Re: Difference?
This Tee Dee is older, excellent machining. The crank journal is intimate. Wi the delrin intake body, the engine dinnae leak oil outae the front of the journal hardly. Wi the Aluminum one, the crank journal leaks black oil like a seive. The delrin one seals nicely wi little torque on the retaining collar. I have many delrin ones. I thought the aluminum one would be a nice bling but alas, i threw it out. I have one on a TD 051 as well that I wi be removing.
Scotland421- Silver Member
- Posts : 82
Join date : 2021-03-07
Re: Difference?
Seems like this forum has censoring like face book and twitter. Sad
Scotland421- Silver Member
- Posts : 82
Join date : 2021-03-07
Re: Difference?
Scotland421 wrote:Seems like this forum has censoring like face book and twitter. Sad
Censored what?
Levent Suberk- Diamond Member
- Posts : 2228
Join date : 2017-12-24
Location : Türkiye
Re: Difference?
Someone posted the Ebay store owner should communicate with me. I wrote He blocked me and is snubbing my reply, failure tae communicate...Comment deleted.
Scotland421- Silver Member
- Posts : 82
Join date : 2021-03-07
Re: Difference?
Admin can clear that situation.
Levent Suberk- Diamond Member
- Posts : 2228
Join date : 2017-12-24
Location : Türkiye
Re: Difference?
Only Admin and I have the ability to delete anything. I didn’t delete anything and I doubt he did either. There is an automatic forum censor however it will only censor certain curse words. Everything else would be left as you wrote it.
I have used the aluminum carb bodies and have had zero issues with them whatsoever. Perhaps you received one that wasn’t made correctly.
Why the seller banned you I have no idea.
I have used the aluminum carb bodies and have had zero issues with them whatsoever. Perhaps you received one that wasn’t made correctly.
Why the seller banned you I have no idea.
Cribbs74- Moderator
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Posts : 11904
Join date : 2011-10-24
Age : 50
Location : Tuttle, OK
Re: Difference?
I wouldnae use hate words here, wee children might see it. 't is a forum fae fellowship merryment and tinkering.
Scotland421- Silver Member
- Posts : 82
Join date : 2021-03-07
Re: Difference?
I didn't delete anything.
Sometimes if you wait too long while typing up a post, the server can time out and your post doesn't go through. Should give an error message but it's easy to miss.
Sometimes if you wait too long while typing up a post, the server can time out and your post doesn't go through. Should give an error message but it's easy to miss.
Re: Difference?
That is what it was....I'm auld and computeringly challenged. LOL
Scotland421- Silver Member
- Posts : 82
Join date : 2021-03-07
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