OS engine models
#1
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From: Kent,
WA
Can anyone explain the difference between OS models with regards to suffex identifiers FX, SX, AX, FP? I am building a TopFlight Cessna 182 and they recommend using an OS .61 SF/FX with their in-cowl header and muffler. I happen to have an older (brand new still in box) OS .60 FP and would like to use it but am not sure if it is sufficient in size/power and will the header and muffler work with this engine. I've looked at the OS web site but don't find much in the way of information. Any suggestions?
Help, Please!
Jim
Help, Please!
Jim
#3
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From: Quzhou, , CHINA
Dear Sir/Madam:
We-Quzhou Goodray Engine Production Co.,Ltd(China) is located in Quzhou city in the eastern of China,close to Shanghai(Chinese biggest city).We are specialized in manufacturing the gasline engine for 3 years.We can manufacture many kinds of gasline engine(CDI) to form RTR airplane model.At present,there are 26cc(single),45cc(single),50cc(twin),100cc(twin) to supply.We have many engineers to research and develop new products to meet client's demand.Our products has fine property but with preferential price.
Welcome to conclude transaction with us!
Alfonso Wang
G.Manager
Tel:0086-570-8557393
Fax:0086-570-2333185
E-mail;[email protected]
MSN:[email protected]
Add:No.13,Jiaochi street,Quzhou city,Zhejiang province ,China
We-Quzhou Goodray Engine Production Co.,Ltd(China) is located in Quzhou city in the eastern of China,close to Shanghai(Chinese biggest city).We are specialized in manufacturing the gasline engine for 3 years.We can manufacture many kinds of gasline engine(CDI) to form RTR airplane model.At present,there are 26cc(single),45cc(single),50cc(twin),100cc(twin) to supply.We have many engineers to research and develop new products to meet client's demand.Our products has fine property but with preferential price.
Welcome to conclude transaction with us!
Alfonso Wang
G.Manager
Tel:0086-570-8557393
Fax:0086-570-2333185
E-mail;[email protected]
MSN:[email protected]
Add:No.13,Jiaochi street,Quzhou city,Zhejiang province ,China
#4

My Feedback: (1)
To answer your original question on model letters, the first modern, schnuerle ported, ball bearing OS engines were the FSR series in the 1970s.
Following this series were the long stroke SF engines.
The FX engines were the next major series.
These are being slowly replaced by the newest AX engines.
The FP engines were OSs early plain bearing, lower cost engines.
These were replaced by the LA series engines.
In among these main series are several specialty engines (not counting the heli engines). The ducted fan engines used a V designation like VF or VR, as I recall for front or rear intake.
The SX engines like the .32SX and .50SX are low production engines which are supposed to be of higher quality with a resulting higher price.
Following this series were the long stroke SF engines.
The FX engines were the next major series.
These are being slowly replaced by the newest AX engines.
The FP engines were OSs early plain bearing, lower cost engines.
These were replaced by the LA series engines.
In among these main series are several specialty engines (not counting the heli engines). The ducted fan engines used a V designation like VF or VR, as I recall for front or rear intake.
The SX engines like the .32SX and .50SX are low production engines which are supposed to be of higher quality with a resulting higher price.




