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The Cox QRC Empty The Cox QRC

Post  WingingIt74 Mon Apr 02, 2012 7:45 pm

Finally my QRC is complete, thanks to JasonWI for some parts we traded.

My question is this, did it come with the high-comp head, this pic is from Matt's website.
The Cox QRC IMG_2490

Mine also has the high-comp head on it as well, not to say it's original though.

I also notice the exhaust spring is upside down, which I think you would less likely to get your finger hit by the prop.
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The Cox QRC Empty Re: The Cox QRC

Post  engine049 Mon Apr 02, 2012 8:35 pm

came stock with Cox Factory Parts Cat. #1702 .049/.051 Glow Head High Compression

The Cox QRC Qrc10
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Post  EXModelEngines Mon Apr 02, 2012 9:30 pm

The older ones did, yes. The newer ones came with the regular #325, which is a standard compression head.

Regards, Matt
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Post  WingingIt74 Tue Apr 03, 2012 5:50 am

Mine is identical to yours Matt, so I assume it to be correct.
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Post  engine049 Tue Apr 03, 2012 6:02 am

EXModelEngines wrote:The older ones did, yes. The newer ones came with the regular #325, which is a standard compression head.

Regards, Matt
do you have any documentation? I looked all over and such. Perhaps a scan of 1990> QRC? I believe you, just don`t have ane nwe qrc instructions in my lirbabry
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Post  Cribbs74 Tue Apr 03, 2012 7:54 am

I read somewhere that the high comp head was added to make up for the loss of performance from adding a muffler.
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Post  EXModelEngines Tue Apr 03, 2012 8:36 am

engine049 wrote:
EXModelEngines wrote:The older ones did, yes. The newer ones came with the regular #325, which is a standard compression head.

Regards, Matt
do you have any documentation? I looked all over and such. Perhaps a scan of 1990> QRC? I believe you, just don`t have ane nwe qrc instructions in my lirbabry

I probably have an instruction manual somewhere, but not in a digital format. If I had to guess I would say late 80's into the 90's. I have seen a bunch on eBay like this over the years. All had the plastic backplate you would expect for a late 80's/early 90's.

Matt
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Post  Admin Tue Apr 03, 2012 8:40 am

The Cox QRC Lg-869329-0-8305

Not my picture...

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Post  PV Pilot Tue Apr 03, 2012 8:49 am

EXModelEngines wrote:
engine049 wrote:
EXModelEngines wrote:The older ones did, yes. The newer ones came with the regular #325, which is a standard compression head.

Regards, Matt
do you have any documentation? I looked all over and such. Perhaps a scan of 1990> QRC? I believe you, just don`t have ane nwe qrc instructions in my lirbabry

I probably have an instruction manual somewhere, but not in a digital format. If I had to guess I would say late 80's into the 90's. I have seen a bunch on eBay like this over the years. All had the plastic backplate you would expect for a late 80's/early 90's.

Matt

I have a NIB Sportavia kit with the QRC and the pic on the box shows a zinc plated metal backplate. Kit was initially purchased new in 1982 and never opened. Havent opened the shipping box yet, just recieved it yesterday. I would imagine it has the high comp head.
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Post  Admin Tue Apr 03, 2012 9:01 am

Every time I find a QRC in a crystal box, it has the 1702 head. When I see the plastic backplate later ones, those have the 325 head.

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Post  Cox International Tue Apr 03, 2012 9:47 am

Metal backplate with regular head on mine. 1977 Cox Hobbies, div. of Leisure Dynamics, Warner Ave, Santa Ana.

I'll host the manual this morning.
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Post  mitchg95 Tue Apr 03, 2012 10:07 am

man i need to get me one of these
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Post  Cox International Tue Apr 03, 2012 11:12 am

Here is a link to the manual:

http://coxengines.ca/files/qrc.pdf

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Post  PV Pilot Tue Apr 03, 2012 1:05 pm

Had to open the box and pull this Sportavia kit apart to see what I had.

So I have the natural finish 8cc tank, zinc plated/dipped metal B plate , and low comp head.
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Post  66 Malibu Tue Apr 03, 2012 6:41 pm

My QRC instruction sheet dated 1977 shows the 1702 head, and the Instructions dated 1986 and 1993 both show the 325 head as standard. My NIB 1993 QRC has the plastic backplate , 325 head and Snap Starter as the earlier picture. FYI
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