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Silver QRC
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Silver QRC



I decided to overhaul a QRC I won ebay a few years ago….After rebuild I ran three tanks thru it rich….. It seemed happy at the rich setting at about 11K…. Fourth run leaned out to 13.5 K, About like the info online indicates…. Using a Cox 6-3 and Glow Plug Boy 24…. This was with a standard glow plug, The one that came on it, Also using three head gaskets as indicated by the instructions for break in I found online….Runs about three minutes…. Wished it would go a bit longer…. Maybe with a little more run time?
Not the strongest of Cox .049s but unique with its muffler which does a pretty good job….Just a little more trouble to prime….Nice to get oily hands agin, Never thought I would have missed that

rdw777- Platinum Member
Posts : 598
Join date : 2021-03-11
Location : West Texas
Re: Silver QRC


When I was looking for information on it online it was mostly to do with QRC’s with red tank and blue spinner but I ran into a post by rsv Bob, Looks like the plain ones were for rtf Cox airplanes, Belated thanks Bob!! Also an advertisement that hints at dating….
Also I want to thank Ken Cook for a past post that I saved on sealing tanks for Bee type engines, Those help tremendously to provide steady runs ….
Robert
rdw777- Platinum Member
Posts : 598
Join date : 2021-03-11
Location : West Texas
Re: Silver QRC
Robert,
What is the number on the cylinder? QRC should be #6 or not numbered , 2 bypass and no SPI. Also should have a 1702 head on it.
If it’s just a regular bee with a muffler on it then those tach readings sound correct. If it is a number 6 cylinder then put the TD head on it. I would also recommend a 5x3, but depends on your plans for it. What fuel? 1 gasket for every 10% nitro. So if 25 percent 3 gaskets 20% 2 gaskets etc. it’s a wag really, but you can add or subtract gaskets until you see the best performance.
Ron
What is the number on the cylinder? QRC should be #6 or not numbered , 2 bypass and no SPI. Also should have a 1702 head on it.
If it’s just a regular bee with a muffler on it then those tach readings sound correct. If it is a number 6 cylinder then put the TD head on it. I would also recommend a 5x3, but depends on your plans for it. What fuel? 1 gasket for every 10% nitro. So if 25 percent 3 gaskets 20% 2 gaskets etc. it’s a wag really, but you can add or subtract gaskets until you see the best performance.
Ron
Cribbs74- Moderator
Posts : 11879
Join date : 2011-10-24
Age : 48
Location : Tuttle, OK
Re: Silver QRC

It has a mark on it but I can’t tell much from it…. Yes, dual bypass and no SPI…. Also no taper or very little in the cylinder…. Also no 1702 head, Just standard….
If I do anything with it maybe a simple 2 channel RC…. I’m shopping on outerzone to see what might be interesting….. The muffler is appealing because there’s a chance I could fly about one mile from home…. Closest RC field is about 1-1/2 hrs away
rdw777- Platinum Member
Posts : 598
Join date : 2021-03-11
Location : West Texas
Re: Silver QRC
With standard head and 24% run one head gasket, should pick up some rpm. Not sure about run time. These engines require very little
break-in.
break-in.
crankbndr- Diamond Member
- Posts : 2956
Join date : 2011-12-10
Location : Homestead FL

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