What plane should I build for my OS FS 52?

[Warren Leadbeatter]

Hi folks

I have a brand new OS FS 52 4 stroke that I would like to build a model for.  Any suggestions?  I have a kit for a Sig Super Chipmunk but I feel the engine is too big for it.

I would like it to be a full fuselage F2B class model.  Your thoughts?  Please supply pics too if available.

Cheers

[peabody]

Steve Moon has been very successful with a 52 powered Saturn, available from UHP.

[Bob Zambelli]

Warren - the .52 is extremely powerful. You can substitute it for a 2 stroke .60.

Bob Dixon replaced some sort of tuned pipe .60 setup with the .52 and he said it was a noticeable increase in performance. Uses less than 4 ounces of fuel as I recall.

Mine was in one of Windy's Cardinals and it pulled it without any problems.

If you wish, address it to my 4S mailing list and we can see who else has tried it.

Bob Z.

[Ron King]

I have an OS 52 FS and have flown it it my old Time Machine and my Legacy. As Bob mentioned, don't be afraid to put this into a 60 size stunter.

The engine is very powerful for its displacement.

Ron

[Bob Zambelli]

Warren - I passed your request on to over 100 people.

Information is on the way to you now.

Bob Z.

[Bradley Walker]

I have an OS 52 FS and have flown it it my old Time Machine and my Legacy. As Bob mentioned, don't be afraid to put this into a 60 size stunter.

The engine is very powerful for its displacement.

Ron

I would suggest something around 650 sq in.  I would treat an OS Max 52 as being equal in power to a PA 61/65 in terms of what prop it will easily turn.

I would look at the Saturn, Time Machine, SV-11, etc.

[RandySmith]

Hi folks

I have a brand new OS FS 52 4 stroke that I would like to build a model for.  Any suggestions?  I have a kit for a Sig Super Chipmunk but I feel the engine is too big for it.

I would like it to be a full fuselage F2B class model.  Your thoughts?  Please supply pics too if available.

Cheers

Hi Warren

Just to answer a comment and interject some "facts" in here, The OS 52 is a good engine, however it will never approach the power of a  PA 61 or PA 65, I have had all these engines, tested them, plotted horsepower-torque curves on many and can tell you the Pa 61  65 will do loafing in a  4 cycle what the OS 52 does running 20% nitro running very hard.  People also use the ST 51 in many of the exact same airplanes mentioned here.

Regards
Randy Smith

[Rudy Taube]

Warren,

Thanks for asking this question. It is interesting to see a comparison between the different types of CL power systems, and what size planes each can fly. I flew my 1st 4S engine in the early 80s (a Saito 270 twin) and have had many 4S since. I like their sound, and the efficient way they swing big props. The ones I have seen in CL seem to be a perfect match for our type of model flying. Watching Igor's excellent 4S flights at several contests here in CA convinces me that a 4S is made for CL flying! I really like my ECL systems, but I also like the sound of a 4S, and the smell of Castor oil in the morning. 

Randy,  (and others)

Do you think the new Saito CL .72 is = in power to one of your excellent PA .61 or .75 piped engines? Would the Saito .72 be a good engine for your SV-11 or Intrepid-XL?

What do you think is the upper limit in weight and size that this .72 Saito could fly well? 800 sq in? 85 oz (TOW)? or??? ..... TIA for your help.

Regards, 

[steven yampolsky]

Hi folks

I have a brand new OS FS 52 4 stroke that I would like to build a model for.  Any suggestions?  I have a kit for a Sig Super Chipmunk but I feel the engine is too big for it.

I would like it to be a full fuselage F2B class model.  Your thoughts?  Please supply pics too if available.

Cheers

At the end of 2006 season, I flew FS52 in Rick Campbell's Heartbreaker design(Dave Cook's Lightning derivative). It's a 650 design and FS52 had was a perfect fit. Since then, Rick has designed two more models around the same numbers: Stoli Special and Eurostyle. Both turned out to be AMAZING performers. OS52 is PERFECT for these designs. You can get plans from Rick for both designs.

Here are a few pictures:

[Steve Helmick]

I thought Warren was a Brodak dealer? Why not a Legacy?    Steve

[SteveMoon]

Saturn! Hands down, the Saturn. No changes at all.
Build it totally stock. The OS 52 FS and the Saturn
is the best combo I've ever flown.

Steve

[RandySmith]

Warren,

Thanks for asking this question. It is interesting to see a comparison between the different types of CL power systems, and what size planes each can fly. I flew my 1st 4S engine in the early 80s (a Saito 270 twin) and have had many 4S since. I like their sound, and the efficient way they swing big props. The ones I have seen in CL seem to be a perfect match for our type of model flying. Watching Igor's excellent 4S flights at several contests here in CA convinces me that a 4S is made for CL flying! I really like my ECL systems, but I also like the sound of a 4S, and the smell of Castor oil in the morning. 

Randy,  (and others)

Do you think the new Saito CL .72 is = in power to one of your excellent PA .61 or .75 piped engines? Would the Saito .72 be a good engine for your SV-11 or Intrepid-XL?

What do you think is the upper limit in weight and size that this .72 Saito could fly well? 800 sq in? 85 oz (TOW)? or??? ..... TIA for your help.

Regards, 

Hi Rudy

I would not use a 72 in the SV-11 or Intrepid XL because of the sheer weight of that engine. The Tempest, or Starfire would be a much better choice in my designs.  A good choice for the Saito 72 would be a 725 to 750 sq in stuntship or a scale type such as Gordan Delaney's Tony, or the short nosed Bearcat of Al Rabe.
If you wanted to use a 4 cycle in the SV-11  I would suggest the Saito 56.  And  Steve Moon is right about the OS 52, a good designed Airplane in the  640 to 650 sq inch range is a  great choice for the OS 52, such as the  Saturn. There are  also many more ships that size that would work equally well.

Regards
Randy

[Bradley Walker]

...or you could pretty much shorten the nose (or lengthen the tail) on any design out there and use the 4 stroke.

It is just common sense.



Of course, you could always fly the Remi Berringer design the Sportster.  It was designed for a 4 stroke.  He seems to do pretty well with it.

[Warren Leadbeatter]

Thanks for all the great input, ideas and pics guys.

[Steve Helmick]

May we have the envelope, please?

I'm thinkin' that Warren has made a decision and has the plane about halfway finished by now. I don't know about everybody, but I'm wondering what plane we're going to see pics of, and when!  Steve

[Richard Grogan]

May we have the envelope, please?

I'm thinkin' that Warren has made a decision and has the plane about halfway finished by now. I don't know about everybody, but I'm wondering what plane we're going to see pics of, and when!  Steve

Your probably right Steve! He probably flew it today, trimiing it out, and going back out tomorrow!!

Dude builds faster than anyone I've ever seen!And WELL!!

[Warren Leadbeatter]

Thanks for the compliments guys.   I'm leaning towards the Saturn or the Legacy, haven't decided yet.  I've been working pretty hard lately and it's getting warmer now so the weekends have been spent either lazing around or flying rather than building.