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Cox Engine of The Month
QRC .049 History
Page 1 of 1
QRC .049 History
I recently obtained an original QRC that was dirty but after cleanup was found to be in very good condition. Seems maybe only run a time or two then shelved.
I have run it on a plane of mine. I must admit that I'm not incredibly impressed with performance however with the muffler sounds a bit like a mosquito flying by. It does run quite decent lower end of the power spectrum however due to low BHP run time is pretty good. Running over three minutes.
Question: What planes were fitted with this motor in which years? I know it must be mid 70's when noise was starting to be an issue. But what planes did cox fit with this interesting looking motor?
Thanks
Iceberg
I have run it on a plane of mine. I must admit that I'm not incredibly impressed with performance however with the muffler sounds a bit like a mosquito flying by. It does run quite decent lower end of the power spectrum however due to low BHP run time is pretty good. Running over three minutes.
Question: What planes were fitted with this motor in which years? I know it must be mid 70's when noise was starting to be an issue. But what planes did cox fit with this interesting looking motor?
Thanks
Iceberg
Iceberg- Gold Member
- Posts : 381
Join date : 2018-11-03
Location : Suva Fiji Islands
Re: QRC .049 History
I have a Cox Cessna ( or maybe it’s a EZ Bee) and a Cox Sportavia that shows the Red, Silver and Blue “QRC” on the box, but inside mounted on the plane is just the all silver extended tank “Silver Bee” with a muffler.
I assumed that Estes ran out of the Red anodized tanks, and just substituted the regular aluminum tank. Yeah, the mufflers didn’t provide any help in the power output of the engines, that’s for sure!
I assumed that Estes ran out of the Red anodized tanks, and just substituted the regular aluminum tank. Yeah, the mufflers didn’t provide any help in the power output of the engines, that’s for sure!
Last edited by Marleysky on Tue Aug 11, 2020 3:14 pm; edited 1 time in total
Marleysky- Top Poster
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Levent Suberk- Diamond Member
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Re: QRC .049 History
THANKS Levent! Nice pictures of the boxes and planes! RED silver and blue on the box , just plain silver on the plane!
Marleysky- Top Poster
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Re: QRC .049 History
Marleysky wrote:I have a Cox Cessna ( or maybe it’s a EZ Bee) and a Cox Sportavia that shows the Red, Silver and Blue “QRC” on the box, but inside mounted on the plane is just the all silver extended tank “Silver Bee” with a muffler.
Since the QRC was my first engine associated with an R/C plane I've held them in esteem. Recently I've been refurbishing several of them I've collected through the years. Since the only ones I had previous experience with were the all silver ones in the RTF planes I didn't think much about it until I pulled them out to see what was needed to bring them back up to snuff. After doing the best I can to find pics and info, I've come to the conclusion there were three stages plus an Estes period in their production history.
Ver 1, The first ones, had a brass backplate, red tank, silver crankcase & spinner cone, standard round prop drive with the old red style snap starter. MH Aerotools mentioned some had brass standard round prop drives???
Ver 2, which is the iconic image people associate with QRCs came out shortly afterward with the zero drag spring start and the blue spinner cone. Later iterations of these came out with the new style hex prop drive w/grey snap starter and plastic backplates.
Ver 3, is the all silver versions that were included in the RTF planes. These had the new style hex prop drives and grey snap starter. I don't think it was a matter of "running out of colors" for Cox as much as lets keep the production costs cheap and keep the fancy colors for the consumer boxed engines. I distinctly remember mine had a Brass backplate but they moved to the black plastic ones shortly afterwards. I also think some came with Brass hex prop drives.
Estes, by the time Estes got a hold of things is when the consumer boxed versions started coming out with whatever parts were available whether they had colors or not. Basically if it had an 8cc stunt tank and a muffler, it was a QRC.
Mike
Cryhavoc- Bronze Member
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Location : Copperas Cove, Texas
Have used EZ Bee for trade or ??
Iceberg wrote:I recently obtained an original QRC that was dirty but after cleanup was found to be in very good condition. Seems maybe only run a time or two then shelved.
I have run it on a plane of mine. I must admit that I'm not incredibly impressed with performance however with the muffler sounds a bit like a mosquito flying by. It does run quite decent lower end of the power spectrum however due to low BHP run time is pretty good. Running over three minutes.
Question: What planes were fitted with this motor in which years? I know it must be mid 70's when noise was starting to be an issue. But what planes did cox fit with this interesting looking motor?
Thanks
Iceberg
Iceberg: someone in the forum, nitrosmeller and I, have 2 used EZ Bee’s for sale or trade , or ??
PM if interested. I have shown pics before. I can’t from this iPad currently.
Happydad.
happydad- Rest In Peace
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Cryhavoc- Bronze Member
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Cryhavoc- Bronze Member
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Join date : 2013-10-29
Age : 57
Location : Copperas Cove, Texas
Re: QRC .049 History
Nice collection.
I especially like the RR-1 and the packaged Space Bug.
And, my thinking was......why didn't they label the engine on the EZ package as a QZ rather than just a Babe Bee,,
I especially like the RR-1 and the packaged Space Bug.
And, my thinking was......why didn't they label the engine on the EZ package as a QZ rather than just a Babe Bee,,
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davidll1984- Diamond Member
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davidll1984- Diamond Member
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Re: QRC .049 History
Absolutely one of the coolest posts I have read in a while.
MrGoodwreck- Silver Member
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Re: QRC .049 History
davidll1984 wrote:my wit new mufler
not rc just silensed
Very cool stuff David. Kind of a QZ-Car engine. Love the "modern" QRC, might have to build one myself
Mike
Cryhavoc- Bronze Member
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Re: QRC .049 History
rc exaust on cars giving same performance tink exaust from ez bee is litle bether wit heat trap ful close sound good les noise just drop of rpm on cars trap wont fuly close
davidll1984- Diamond Member
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