OS 32F Questions
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OS 32F Questions
I bought a used Lazy Tiger 51 with an OS 32F engine. This is really a great running and reliable engine and fits the plane well. I would like to get another 32F. My questions are -What is the difference between the airplane and helicopter versions other than the larger cylinder head? Could I run the helicopter engine on an airplane since I can find lots of them used? Is a used helicopter engine pretty much "used up" and looking for a major rebuild?
I know, just buy an SX. The 32F is a bit lighter and with the same performance, I think.
I know, just buy an SX. The 32F is a bit lighter and with the same performance, I think.
#2
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RE: OS 32F Questions
I am a big fan of the OS .32F and F-H engines. Were I to buy either the F-H or SX-H used, it would have to be the ringed version.
The .32F was available in ABN only. The heli engine, the F-H, was available in both ringed and ABN. My F-H was ringed and it ran rings around the ABN version in every way that counted. I used both of my .32 engines in competition fun-fly models. Both were great engines, but the ABN version peeled the plating from its liner early on. Naturally, the ringed engine, having no plating, just got sweeter and sweeter as the flights accumulated.
Faced with the same dilemma as yourself, I jumped over the SX (but have three of them in helis) when I bought my last engine for a fun fly type of plane and went right for the ringed .37H. Haven't ran it yet, but the weight is close enough to the F-H that it doesn't bother me. There's no replacement for displacement, as I'm sure you've heard before, so I'm expecting a little more power than was available from the older .32F-H. We shall see.
Other engines that are equally sweet and powerful are the Webra line of .30-ish sized engines.
Ed Cregger
The .32F was available in ABN only. The heli engine, the F-H, was available in both ringed and ABN. My F-H was ringed and it ran rings around the ABN version in every way that counted. I used both of my .32 engines in competition fun-fly models. Both were great engines, but the ABN version peeled the plating from its liner early on. Naturally, the ringed engine, having no plating, just got sweeter and sweeter as the flights accumulated.
Faced with the same dilemma as yourself, I jumped over the SX (but have three of them in helis) when I bought my last engine for a fun fly type of plane and went right for the ringed .37H. Haven't ran it yet, but the weight is close enough to the F-H that it doesn't bother me. There's no replacement for displacement, as I'm sure you've heard before, so I'm expecting a little more power than was available from the older .32F-H. We shall see.
Other engines that are equally sweet and powerful are the Webra line of .30-ish sized engines.
Ed Cregger
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RE: OS 32F Questions
Fun-fly is exactly what I had in mind! How can I tell if the engine is the ringed model or ABN? Also, did you replace the cylinder head or just run the heat sink heli head? (Would look kinda cool.)
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RE: OS 32F Questions
I have a pair of 32F's on a twinstar. Very impressive to say the least, they act like hot 40's and are much lighter. Mine are the non ringed as Ed discribed which is easy to determine. Remove the muffler and look at the piston through the port, no ring and a single line on the piston skirt is ABN.
Use Castor based fuel and they should last for quite a while.
Use Castor based fuel and they should last for quite a while.
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RE: OS 32F Questions
Like Ed said, the 32f's are ABN period. If it's a 32F, it's ABN. I would not be in a hurry to aquire a used Heli engine unless new, they are just turned too tight for my liking...
So you know, find someone with a ringed engine and check it out for your own information in the future. It's easy to tell the diffrence once you know what you are looking at.
So you know, find someone with a ringed engine and check it out for your own information in the future. It's easy to tell the diffrence once you know what you are looking at.
#7
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RE: OS 32F Questions
The 32F/H works great in an airplaneas does an older Webra 32. Many of the newer 32-37 heli engines have carbs that are too big for airplanes. I just got a new Enya 35X and Webra 35H, both are heli engines and have oversize venturis. Enya uses a venturi sleeve for their airplane version and Webra lists a smaller carb for theirs.
#8
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RE: OS 32F Questions
Like said above, buying a used 32F is a crap shoot. They are great running engines if they don't peel, which only a few did. But if you can find a new one, then grab it. I just sold a NIB 32F that was traded to me, i got top dollar because they are harder to find now days and in my opinion were just as great running and as powerful as the 32SX.
If you want another engine in that size range, the Webra 32 is awsome, and so is the super Tigre 34. I have three ST34's and two Webra 32's and no more OS 32's if that tells you anything.
The webra is stronger than the OS and you will never peel the liner out of it. The ST 34 is a hair stronger than the OS 32 and super friendly and a lot less expensive. I do have the older Italian made ST 34's and have no experience with the chinese ones.
If you want another engine in that size range, the Webra 32 is awsome, and so is the super Tigre 34. I have three ST34's and two Webra 32's and no more OS 32's if that tells you anything.
The webra is stronger than the OS and you will never peel the liner out of it. The ST 34 is a hair stronger than the OS 32 and super friendly and a lot less expensive. I do have the older Italian made ST 34's and have no experience with the chinese ones.
#9
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RE: OS 32F Questions
ORIGINAL: fcomer84
Fun-fly is exactly what I had in mind! How can I tell if the engine is the ringed model or ABN? Also, did you replace the cylinder head or just run the heat sink heli head? (Would look kinda cool.)
Fun-fly is exactly what I had in mind! How can I tell if the engine is the ringed model or ABN? Also, did you replace the cylinder head or just run the heat sink heli head? (Would look kinda cool.)
I retained the stock heli head. While my competitors were using non heli heads, their engines overheated and nearly stalled in the most loops competitions, while my engine with the heli head kept right on going. I didn't even have to richen the mixture, as I had to do with the .32F ABN engine, lest it quit from overheating.
Ed Cregger
#10
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RE: OS 32F Questions
I tend to think that a better heat-sink head is needed for 3D flight, than for normal, sport flying.
...But maybe, a heli head, which is designed to convect heat sufficiently with virtually no airflow, may be an 'overshot'...
It could cause an engine to run cooler than necessary; potentially hurting its response and transition.
...But maybe, a heli head, which is designed to convect heat sufficiently with virtually no airflow, may be an 'overshot'...
It could cause an engine to run cooler than necessary; potentially hurting its response and transition.
#11
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RE: OS 32F Questions
Lots of folks asked me if my heli head was causing me problems. My honest reply was no, that it didn't cause me a single problem at all. I often wondered how it would fare in the NJ Winters, but I stopped flying in the cold long ago, so for me it was a non issue. Most of the flying in fun flying is at a pretty low airspeed anyway, so I think that the extra heat sink area actually helped.
Ed Cregger
Ed Cregger
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RE: OS 32F Questions
Slow speed funflying in red hot, humid Alabama/Georgia summers! Heat sink would work here! I am not finding any 32F's around. A few heli motors, but I think I would rather see them in person before purchasing. I think I should look at the other engines you guys have recommended. My 32F sure is sweet with an APC 10 X 5 prop! I tried a LOT of props, but this is the only one it liked.
#13
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RE: OS 32F Questions
I also liked the Graupner nylon 10x4 that I found in the brush at our field. I asked if anyone had lost such a prop and no one claimed it. I checked it for balance and put it on the OS .32F that was mounted on my Florio Stunt Wagon. It wasn't as good as the Rev-Up wood 11x4 props, but all of those were gone. It also ran well on my little OS FS-20 four-stroke.
A friend and fellow fun-fly competitor swore by 10x5 props too. He was flying lighter fun fly ships than I, so he could stand the extra inch of pitch. He ran the Fox .40 ABC, which cost a little more than half as much as a new OS .32F or F-H. A nice engine, once you got it sorted out. Eventually he went to the Webra .32 GT and didn't look back.
Ed Cregger
A friend and fellow fun-fly competitor swore by 10x5 props too. He was flying lighter fun fly ships than I, so he could stand the extra inch of pitch. He ran the Fox .40 ABC, which cost a little more than half as much as a new OS .32F or F-H. A nice engine, once you got it sorted out. Eventually he went to the Webra .32 GT and didn't look back.
Ed Cregger
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RE: OS 32F Questions
something I did not see mentioned is that helis use a cooling fan(centrifugal fan like a mini leaf blower sort of) and shroud so really they do have quite a bit of airflow over that head, the shroud fits fairly close to that big square head, I would also suggest against buying a used one though unless from a known person who you trust as they get worked pretty hard, even my hirobo shuttle I had with the OS .32(not sure which one) worked that engine hard, its just a lot to spin and a lot of weight to lift....but on a funfly plane that your gonna run hard an beat it may be an advantage as mentioned here...
#16
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RE: OS 32F Questions
ORIGINAL: fcomer84
Well, I always wanted a SuperTigre. I guess now is as good a time as any!
Well, I always wanted a SuperTigre. I guess now is as good a time as any!
-
There are two types of Super Tigre .34 engines. One is the normal .34 ringed version that is a good engine, but is somewhat lackluster in performance when compared to the OS and Webra counterparts. The one that screams is the .34 ABC/Ring. These are not the ones sold at Tower Hobbies for the low prices commonly related to the .34.
There is a fellow poster or two on RCU that knows much more about this subject than I. Hopefully, they will jump in and straighten us out.
Ed Cregger
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RE: OS 32F Questions
The G-34 Ringed ABC/H? Discontinued according to the ST website. The G-34 that is available has a pretty hefty cylinder head on it!
#20
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RE: OS 32F Questions
I always used the G34H with the head turned around. These are highly desirable as the ABC/ring is nearly impossible to damage and they do run better than the standard version. I ran mine on an overweight Sticket with an old style 10-4 Zinger, it could hover with power to spare. The head looks heavier than it is, its actually very light compared to most heli heads.
#21
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RE: OS 32F Questions
ORIGINAL: Vertical3-D
something I did not see mentioned is that helis use a cooling fan(centrifugal fan like a mini leaf blower sort of) and shroud so really they do have quite a bit of airflow over that head, the shroud fits fairly close to that big square head, I would also suggest against buying a used one though unless from a known person who you trust as they get worked pretty hard, even my hirobo shuttle I had with the OS .32(not sure which one) worked that engine hard, its just a lot to spin and a lot of weight to lift....but on a funfly plane that your gonna run hard an beat it may be an advantage as mentioned here...
something I did not see mentioned is that helis use a cooling fan(centrifugal fan like a mini leaf blower sort of) and shroud so really they do have quite a bit of airflow over that head, the shroud fits fairly close to that big square head, I would also suggest against buying a used one though unless from a known person who you trust as they get worked pretty hard, even my hirobo shuttle I had with the OS .32(not sure which one) worked that engine hard, its just a lot to spin and a lot of weight to lift....but on a funfly plane that your gonna run hard an beat it may be an advantage as mentioned here...
Reason being that heli fans tend to suck in a little clutch dust that will usualy find its way down the carb when its running. This causes a lot of premature wear as compared to most plane engines.
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RE: OS 32F Questions
That is what I was thinking. 2-strokes and dirt do not mix at all! Not to mention being run wide-open 97.6% of the time with questionable airflow. Thats a tough life for any engine.
Fuelman... are you coming to Perry?
Fuelman... are you coming to Perry?
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RE: OS 32F Questions
I've found that most heli engines aren't lucky to live long enough to be worn out from dirt, most die from bearing failure because of the corrosive nature of the 30% fuel that most pilots don't totally run out and not using after run oil. The other thing that kills them is piston failure from lean runs, the heated metal is scuffed or smeared to the point were the ring is stuck.
If the used heli engine has good compression, and the bearings havent let go yet, just put new ceramic bearings for $19 in it and run the heck out of it.
http://www.rc-bearings.com/catalog/i...f209b4f10d26fc
The strongest 30 class case engine I’ve come across is a TT 39 heli with a 40 sized tuned pipe running 30%, but the fuel consumption was unbelievable and not worth it. I think it was turning a 10X7 over 17K.
The next would be the Jett 40, it’s a 30 size case it’s lighter than many 25s but it’s $300!
Than comes the Webra 36 it’s only $124 (price drop) but no muffler. http://www.swanyshouse.com/engines/engines.aspx
The Webra 32 with muffler $124, stronger than the OS 32 sx.
And the discontinued Webra 35 ringed has the same power as the OS 32.
I had two 30 class helicopters with OS 32 in one and an Enya 35 in the other, I found the Enya far superior, so this would be a good candidate for a prop too.
I have no idea what kind of engine the new OS 35 AX is, from what I can tell from print it’s heavier than most and lower rpm timed. The price has been dropping on it too.
I still like the little OS 32 SX with a Macs pre-tuned header and pipe, incredible all around performance, whether it be a speed plane with a APC 8x8 or in a PBF hovering with a black plastic Master Airscrew 10X4.
Dam shame to see that little power house discontinued.
If the used heli engine has good compression, and the bearings havent let go yet, just put new ceramic bearings for $19 in it and run the heck out of it.
http://www.rc-bearings.com/catalog/i...f209b4f10d26fc
The strongest 30 class case engine I’ve come across is a TT 39 heli with a 40 sized tuned pipe running 30%, but the fuel consumption was unbelievable and not worth it. I think it was turning a 10X7 over 17K.
The next would be the Jett 40, it’s a 30 size case it’s lighter than many 25s but it’s $300!
Than comes the Webra 36 it’s only $124 (price drop) but no muffler. http://www.swanyshouse.com/engines/engines.aspx
The Webra 32 with muffler $124, stronger than the OS 32 sx.
And the discontinued Webra 35 ringed has the same power as the OS 32.
I had two 30 class helicopters with OS 32 in one and an Enya 35 in the other, I found the Enya far superior, so this would be a good candidate for a prop too.
I have no idea what kind of engine the new OS 35 AX is, from what I can tell from print it’s heavier than most and lower rpm timed. The price has been dropping on it too.
I still like the little OS 32 SX with a Macs pre-tuned header and pipe, incredible all around performance, whether it be a speed plane with a APC 8x8 or in a PBF hovering with a black plastic Master Airscrew 10X4.
Dam shame to see that little power house discontinued.
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RE: OS 32F Questions
Here is my plan. My club and another in the area are going to do fun-flys this coming year. My Magic with a Pro .36 did well in a recent event, but I think my Lazy Tiger 51 with the .32F would be better all around. So, I am going to build another Lazy Tiger, remount the landing gear to the fuselage, do a few other changes to the controls and see what happens. This plan is why I am looking for an engine similar to the OS .32F that works so well on Lazy Tiger #1.
What do you guys think?
What do you guys think?
#25
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RE: OS 32F Questions
ORIGINAL: Fuelman
I would never buy a used heli engine unless it came with new bearings, piston/rod/ring/sleeve.
Reason being that heli fans tend to suck in a little clutch dust that will usualy find its way down the carb when its running. This causes a lot of premature wear as compared to most plane engines.
ORIGINAL: Vertical3-D
something I did not see mentioned is that helis use a cooling fan(centrifugal fan like a mini leaf blower sort of) and shroud so really they do have quite a bit of airflow over that head, the shroud fits fairly close to that big square head, I would also suggest against buying a used one though unless from a known person who you trust as they get worked pretty hard, even my hirobo shuttle I had with the OS .32(not sure which one) worked that engine hard, its just a lot to spin and a lot of weight to lift....but on a funfly plane that your gonna run hard an beat it may be an advantage as mentioned here...
something I did not see mentioned is that helis use a cooling fan(centrifugal fan like a mini leaf blower sort of) and shroud so really they do have quite a bit of airflow over that head, the shroud fits fairly close to that big square head, I would also suggest against buying a used one though unless from a known person who you trust as they get worked pretty hard, even my hirobo shuttle I had with the OS .32(not sure which one) worked that engine hard, its just a lot to spin and a lot of weight to lift....but on a funfly plane that your gonna run hard an beat it may be an advantage as mentioned here...
Reason being that heli fans tend to suck in a little clutch dust that will usualy find its way down the carb when its running. This causes a lot of premature wear as compared to most plane engines.
-
I would have never thought about ingesting clutch dust. Thanks for the tip, Fuelman.
Ed Cregger