Tom Lay's ST 60

[Guy Markham]

Anyone have a copy of instructions that he enclosed with the engine? and how large does the fuel tank have to be ? 

[Guy Markham]

Thanks ever so much. Best, Guy

[Dan McEntee]

  On the one T&L ST.60 that I have in operation right now, I have a 6 ounce tank installed, I believe, in a 60 ounce model, !3-5 wood prop, and use right at 5 ounces of 10% fuel in warmer weather, if I remember correctly. Chris McMillin had to use an 8 ounce tank in his Golden Falcon with a best thumpin' T&L 60 I have ever heard, and the Falcon is a BIG airplane.
    What airplane are you putting it in?
    Type at you later,
     Dan McEntee

[Guy Markham]

  On the one T&L ST.60 that I have in operation right now, I have a 6 ounce tank installed, I believe, in a 60 ounce model, !3-5 wood prop, and use right at 5 ounces of 10% fuel in warmer weather, if I remember correctly. Chris McMillin had to use an 8 ounce tank in his Golden Falcon with a best thumpin' T&L 60 I have ever heard, and the Falcon is a BIG airplane.
    What airplane are you putting it in?     Shark .45 with a Hunt Foam masterflite  wing...............Guy
    Type at you later,
     Dan McEntee

[Dan McEntee]

  For a Shark.45, it is difficult to get a 6 ounce tank in, much less anything bigger. I would make provisions for a 6 ounce tank, and be prepared to down size the venturi a hair or two if needed, or run less nitro to get the run time you need. If the engine is broken in before first flights, i would start with a full 6 ounce tank and time every flight during the maiden flight process until you get a feel for where you are. I'm thinking that 6 ounces will be plenty.
    Good luck with it and have fun,
    Dan McEntee

[Lauri Malila]

These aren't chromed, are they? L

[Ruslan Kurenkov]

These aren't chromed, are they? L

Hello Lauri
In the photo of the engine that Tom Lay collected for me in 2012, a steel sleeve is perfectly visible.

[RandySmith]

These aren't chromed, are they? L

NO the  vast majority of ST 60s with muffler ears  did  not have  chrome sleeves, even though the  case had embossed " chrome"

Randy

[Brett Buck]

  For a Shark.45, it is difficult to get a 6 ounce tank in, much less anything bigger. I would make provisions for a 6 ounce tank, and be prepared to down size the venturi a hair or two if needed, or run less nitro to get the run time you need. If the engine is broken in before first flights, i would start with a full 6 ounce tank and time every flight during the maiden flight process until you get a feel for where you are. I'm thinking that 6 ounces will be plenty.

   I am not an ST60 guy, but we were using more than 6 ounces on an ST46 - it's not enough for an ST60. And you don't want to start compromising on power before you even start.  If the engine fits without shaving the lugs, I think the fuselage has to be at least 2 1/8" wide, more like 2 3/16". That and an inch and a quarter deep tank should get you far more than enough fuel, even if you only end up with 6" of length. My "big" tank is about that, and it wound up at 7.8 ounces. I use a smaller tank because (now) I need only about 6.7 ounces.

     Brett

[Dan McEntee]

   I am not an ST60 guy, but we were using more than 6 ounces on an ST46 - it's not enough for an ST60. And you don't want to start compromising on power before you even start.  If the engine fits without shaving the lugs, I think the fuselage has to be at least 2 1/8" wide, more like 2 3/16". That and an inch and a quarter deep tank should get you far more than enough fuel, even if you only end up with 6" of length. My "big" tank is about that, and it wound up at 7.8 ounces. I use a smaller tank because (now) I need only about 6.7 ounces.

     Brett

      I don't have a ton of experience with the .46, but do remember that a 6 ounce tank was needed for the one I retrofitted to a SIG Chipmunk. My first experiences with the ST.60 was working with Chris McMillin and his Golden Falcon. That was a big PatternMaster sized model and weighed accordingly. The St.60 that Tom built up for him is something that you have to se and hear to believe it! Chris had to put an 8 ounce tank in that airplane and I think usually filled the tank. Another local guy had a couple of models with ST.60s in them. One was one of Jimmy Casal's old Spectrums, and the other was an SV-11. Both of those took fuel loads in the 5 to 6 ounce range if I remember correctly.  My first venture into the land of the ST.60 was with a Cardinal that I bought with a T&L.60 in the nose from Ken Nash down in Joplin, MO.  72 ounces and he had a cut down 12 inch prop on it! I don't know how he even flew it like that. I played with props until I settled on a Brodak 13-6 and it started to pull the model and sound like the ST.60s that I had been around. Then I tried a Vess 13-6 and it made a marked improvement and loaded the engine so well that the fuel consumption went up by almost an ounce. I think that model had a six ounce tank in it and I was short tanking it a bit on 10% SIG Champion fuel with some castor added. I sold off that airplane and have that engine in an airplane I bought from Bob Storick that is in that size range of the Cardinal, maybe a bit smaller and weighs 60 ounces or so. I installed a 6 ounce tank in that just as a starting point and depending on whether I have a 13-5 or 136 prop on it, I run in the 5 ounce area. As far as I know, it's equipped with what ever venturi Tom installed on them. I think I measured once just because I was curious but I don't remember what it was. this history is what I was making my recommendation on, along with my experience with two Shark.45s powered by ST.51s. If building a Shark for a .60 you should definitely plan on building the tank compartment to accept something like you describe. My second Shark had the rear compartment former moved hack against the wing leading edge and I could just squeeze in a 5 ounce store bought tank, which is enough for the more modern ST.51. I would hate to have to cut out the leading edge to accept a longer tank. ST.60 fuel consumption I think is affected by model size, weight and props used, which I'm sure you are aware of. I just think that 6 ounces will do for him in this situation. To this day though, I am still amazed at what the ST.46 in my old Chipmunk required! I might have to revisit that model and build a new one and drop a T&L .46 I have in it just for old time sake. And it should be Super 70's legal I think?
  Type at you later,
   Dan McEntee

[Guy Markham]

Was going to use in the Shark .45 but after some advice will use another engine or go electric.. What are the Tom Lay's 60's selling  for now ??

[Skip Chernoff]

I'm presently flying a Jetco Shark 45 with a modified nose to accept my Big Jim ST 60. When building the leading edge of the wing we  boxed out the area that juts into the tank compartment to accept a 7 oz tank. What I have found is that when flying in Philly with my normal set up I can use almost all of the fuel. When I went to Brodaks at a much higher altitude only 6 oz were needed.

I'm flying on 65' lines eyelet to eyelet ,5% nitro fuel, 13x5 prop ,.310 venturi with ST NVA (not sprinkler) . The plane is a fine flyer,but I'm just getting the hang of it....it's big and doesn't fly like my smaller classic planes.