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Cox Engine of The Month
Spitzy 8 ? O&r
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Spitzy 8 ? O&r
I would like to know more about these engines Very curious to know if the little one with the prop attachment broken Would be repairable I just picked it up and I didn't start cleaning or dismantling without knowing How do we dismantle them? It seems difficult for some of them because I don't have the tools. For them, many of them probably need parts that are practically impossible to find, but we never know.
I found these two poor little ones who really need parts or a lot of creativity to make them functional
And Ohlsson and Rice Engine that seems to be missing parts like the other two but more complete
In the engine batch I found several very old engines obviously with COX engines.
I found these two poor little ones who really need parts or a lot of creativity to make them functional
And Ohlsson and Rice Engine that seems to be missing parts like the other two but more complete
In the engine batch I found several very old engines obviously with COX engines.
davidll1984- Diamond Member
- Posts : 2287
Join date : 2020-02-12
Age : 39
Location : shawinigan
Re: Spitzy 8 ? O&r
I personally wouldn't take the Spitfire apart. Soak it if needed and try to remove the prop screw with grinding a slot and straight screw driver. There's absolutely no parts available. The cylinder screws into the case and the cylinder is quite soft. The case itself is as fragile as a eggshell and many times the ears are broken off. Many tried using pliers which totally screws it up cosmetically or it can even twist it.
The O&R is a sideport and it can be difficult sometimes figuring out the displacement if not clearly marked. The engine was offered as a spark ignition, later versions sold without the timer were for glow. Yours could be either or. You have the free flight tank which is somewhat of a rarity. In addition, the cylinder IS NOT REMOVABLE. The cylinder is spot welded on. When O&R started to remove the ignition timers and went to selling the version as glow, the cylinder were blowing off or breaking the case. O&R then began to detune the engine by lowering the compression to compensate. The engine is very anemic and this made the engine worse. These engine fell out of favor quite quickly. I personally love them as I find them to be easy starting in spark and glow. The O&R front case comes off and there's a unique thrust bearing used and the needles are loose in the cage which can be lost very easily if they fall out. There's no gaskets available and it's a very thin and a bit difficult to make. Keep the pitch at least a 6 pitch for most of the displacements the oil content at least 25% and the nitro 10% or under.
The O&R is a sideport and it can be difficult sometimes figuring out the displacement if not clearly marked. The engine was offered as a spark ignition, later versions sold without the timer were for glow. Yours could be either or. You have the free flight tank which is somewhat of a rarity. In addition, the cylinder IS NOT REMOVABLE. The cylinder is spot welded on. When O&R started to remove the ignition timers and went to selling the version as glow, the cylinder were blowing off or breaking the case. O&R then began to detune the engine by lowering the compression to compensate. The engine is very anemic and this made the engine worse. These engine fell out of favor quite quickly. I personally love them as I find them to be easy starting in spark and glow. The O&R front case comes off and there's a unique thrust bearing used and the needles are loose in the cage which can be lost very easily if they fall out. There's no gaskets available and it's a very thin and a bit difficult to make. Keep the pitch at least a 6 pitch for most of the displacements the oil content at least 25% and the nitro 10% or under.
Ken Cook- Top Poster
- Posts : 5455
Join date : 2012-03-27
Location : pennsylvania
Re: Spitzy 8 ? O&r
A great success I managed to resurrect this engine it no longer had any fixing for the propeller I made the parts specially made for it and I used a modified Cox part for the spray bar and needle And it works well
I had to re-drill the hole in the ventury to the bottom of the spray bar but not completely so that the air circulates sufficiently. The cox part is larger in diameter but only the part in the ventury but in fact slightly thinner in the holes in the crankcase then i jb weld in place its Perfect In doing so. I may have improved the air flow slightly Not knowing the performance of this engine originally it is difficult to say but with the small test inside the house showed that it worked well seems close to the performance of a Cox engine
I had to re-drill the hole in the ventury to the bottom of the spray bar but not completely so that the air circulates sufficiently. The cox part is larger in diameter but only the part in the ventury but in fact slightly thinner in the holes in the crankcase then i jb weld in place its Perfect In doing so. I may have improved the air flow slightly Not knowing the performance of this engine originally it is difficult to say but with the small test inside the house showed that it worked well seems close to the performance of a Cox engine
davidll1984- Diamond Member
- Posts : 2287
Join date : 2020-02-12
Age : 39
Location : shawinigan
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