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Stepped No4 cylinder?
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Stepped No4 cylinder?
John Goddard Tue Apr 24, 2012 8:26 am
I've got stepped 051's but never seen a stepped 049 Td.
Anyone?
Anyone?
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Re: Stepped No4 cylinder?
fit90 Tue Apr 24, 2012 8:51 am
The engine in my avatar has a stepped #4 cylinder. This engine is also in the gallery.
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Re: Stepped No4 cylinder?
John Goddard Tue Apr 24, 2012 12:30 pm
WingingIt74 wrote:What did you step in?
It was lucky
So anyone have a stab at an era?
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Re: Stepped No4 cylinder?
nitroairplane Tue Apr 24, 2012 12:42 pm
But Bob that looks like it is milled for throttle ring, no?fit90 wrote:The engine in my avatar has a stepped #4 cylinder. This engine is also in the gallery.
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Re: Stepped No4 cylinder?
fit90 Tue Apr 24, 2012 2:03 pm
This one does look to have been ground. I have several other stepped #4's that have not been groound though. I am at least the second owner of these cylinders.
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Re: Stepped No4 cylinder?
Cribbs74 Tue Apr 24, 2012 3:18 pm
John Goddard wrote:WingingIt74 wrote:What did you step in?
It was lucky
So anyone have a stab at an era?
70's, it was an upgrade from the thin walled jobs.
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Re: Stepped No4 cylinder?
John Goddard Tue Apr 24, 2012 3:33 pm
Ho Kay
It's pre 73 (no mesh) but doh no date on instructions.
It also has the very orangy/coppery gold anodising that I've only seen on the
Mk2 special before. I had hoped I may have scored the 1968 prize.
But at least it's Pukka, I thought I might have pppppp picked up a pup.
It's pre 73 (no mesh) but doh no date on instructions.
It also has the very orangy/coppery gold anodising that I've only seen on the
Mk2 special before. I had hoped I may have scored the 1968 prize.
But at least it's Pukka, I thought I might have pppppp picked up a pup.
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Re: Stepped No4 cylinder?
Mark Boesen Tue Apr 24, 2012 11:17 pm
Cox machine a groove in the cylinders for the new throttle for both .020 and .049/.051, some time in 1969, until 1975 +/-
It wasn't considered a upgrade, just a way to install the throttle barrel.
The 'Screen' cylinders came out in '76 and were very short lived, less then a year, followed by the even rarer stainless steel 'slotted' cylinders, before the now common slotted cylinders appeared in '78
It wasn't considered a upgrade, just a way to install the throttle barrel.
The 'Screen' cylinders came out in '76 and were very short lived, less then a year, followed by the even rarer stainless steel 'slotted' cylinders, before the now common slotted cylinders appeared in '78
Last edited by Mark Boesen on Wed Apr 25, 2012 5:34 pm; edited 1 time in total
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Re: Stepped No4 cylinder?
John Goddard Wed Apr 25, 2012 12:02 am
Cheers Mark
I'll put a photo on later this
Morning.
J
I'll put a photo on later this
Morning.
J
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Re: Stepped No4 cylinder?
Jason_WI Wed Apr 25, 2012 12:05 am
Dan Sitter is selling a number of stainless slotted cylinders that are on product engines.
http://www.ebay.com/itm/RARE-Cox-049-Model-Airplane-Engine-with-Slotted-Screen-Cylinder-/380406493790?pt=LH_DefaultDomain_0&hash=item5891fe725e
Jason
http://www.ebay.com/itm/RARE-Cox-049-Model-Airplane-Engine-with-Slotted-Screen-Cylinder-/380406493790?pt=LH_DefaultDomain_0&hash=item5891fe725e
Jason
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Re: Stepped No4 cylinder?
John Goddard Wed Apr 25, 2012 12:11 am
What was the thinking behind these slotted one lads?
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Re: Stepped No4 cylinder?
Cribbs74 Wed Apr 25, 2012 12:18 am
John Goddard wrote:What was the thinking behind these slotted one lads?
Good question John, looks like a suppression type thing. Actually it looks like a hose clamp.
Are we talking steps or screens? Seems like things got off track.
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Re: Stepped No4 cylinder?
Jason_WI Wed Apr 25, 2012 12:22 am
Keep from burning your fingers and starting fires is my guess. First was the mesh, then the stainless slotted and finally was the twin slit cylinders which worked.
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Re: Stepped No4 cylinder?
John Goddard Wed Apr 25, 2012 5:16 am
Thanks Jace
Ok so now the plot plot really thickens........
In fact I'm going to start another thread
Ok so now the plot plot really thickens........
In fact I'm going to start another thread
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