Sportster 60 power
#2
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RE: Sportster 60 power
The SS is a nice little stunt plane and engine size depends on how you plan on flying it. The .61 for me is a bit under powered and the 75 may be a better choice. I had the OS .91fs in one and it was OK but a bit more power would have been better. These are old designed kits and the .60s were the norm back in the day, we have much better choices these days.
#3
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RE: Sportster 60 power
My opinion would be that since you already have the .61FX you might as well use it. Buddy of mine built a .60 size Sportster back in the late 1980's and used a Webra Speed .61 and that was a real nice flying airplane.
Try and keep it as light as possable...the .61FX will be a good combo...not spectacular, but nice.
If you're in the mood to buy another engine, a .75 or even a .91 would make it closer to "spectacular"
The .61 size engines don't seem to get used much anymore...since you can get .75's and even .91's in the same size case (and wt. )
I have a .61FX, and it's a decent engine IMO. Mine will turn an APC 13x6 at 11,500 r.p.m. on 15% nitro Omega and a Slim Line Pitts style muffler.
Try and keep it as light as possable...the .61FX will be a good combo...not spectacular, but nice.
If you're in the mood to buy another engine, a .75 or even a .91 would make it closer to "spectacular"
The .61 size engines don't seem to get used much anymore...since you can get .75's and even .91's in the same size case (and wt. )
I have a .61FX, and it's a decent engine IMO. Mine will turn an APC 13x6 at 11,500 r.p.m. on 15% nitro Omega and a Slim Line Pitts style muffler.
#4
My Feedback: (-1)
RE: Sportster 60 power
I didn't notice you already had the .61, I too would install it and give it a try and see if you were happy with it. I just installed the .61 in a stock built 4*60 and was very disappointed in how it flew the plane. It's OK but with a bit more power the plane could do things a lot better. I always try what I have on hand before I buy anything new so Prop is correct, see how you like it first, the plane was designed for that size engine back in the day and will fly it.
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RE: Sportster 60 power
I would say if you got it, try it. It's always better to have too much power then not enough in my opinion. I would run a Saito 115 or 125a.
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RE: Sportster 60 power
The 15cc gas engines are interesting, but I'm wondering if the weight, (29 oz), would be an issue? My OS 61 weighs 23.6 oz. They say the 15cc is for "60 size" planes. Hmmmm.
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RE: Sportster 60 power
That much weight that far forward is going to demand that you move the battery way back, at least. The great things about the SS is that it does great aerobatics, and lands like a trainer. If you add a lot of weight, it loses a lot benefit of the design of the plane. I think that you will be very happy with what you have. Try and save as much weight as you can. Even a few ounces in the right places can make a big difference.
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RE: Sportster 60 power
ORIGINAL: JohnBuckner
Using a 61 in a sixty sized airplane may not be politically correct but its a Darn good plan especially if you needed to ask on a forum what size engine to use
Using a 61 in a sixty sized airplane may not be politically correct but its a Darn good plan especially if you needed to ask on a forum what size engine to use
The reason I asked on a forum was I was disappointed with that engine's performance in a Bruce Tharpe Venture 60, (sixty size). I changed it out to a Tower 75 and there was much improvement. Sooo, I have this OS sitting around and I thought I'd see what others think. OK?
#13
My Feedback: (1)
RE: Sportster 60 power
Sure thats OK But I have done the maidens on a number of Super Sportsters with various sixty ones and they all flew so darn nice.
I beleve often in these forums folks also get carried away in a big snowballing push for bigger and bigger when it comes to engine size recomendations that may even reach ridiculous proportions at times.
As far as the small gasser you mentioned I don,t know anything about it. I have watched some fellows struggle with 18cc Ryobi's but on Cubs at around eighty inchs and they were pitiful performers.
You should definately do a thread if you go that new small gasser route[8D]
John
I beleve often in these forums folks also get carried away in a big snowballing push for bigger and bigger when it comes to engine size recomendations that may even reach ridiculous proportions at times.
As far as the small gasser you mentioned I don,t know anything about it. I have watched some fellows struggle with 18cc Ryobi's but on Cubs at around eighty inchs and they were pitiful performers.
You should definately do a thread if you go that new small gasser route[8D]
John
#14
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RE: Sportster 60 power
ORIGINAL: CB36
The reason I asked on a forum was I was disappointed with that engine's performance in a Bruce Tharpe Venture 60, (sixty size). I changed it out to a Tower 75 and there was much improvement. Sooo, I have this OS sitting around and I thought I'd see what others think. OK?
ORIGINAL: JohnBuckner
Using a 61 in a sixty sized airplane may not be politically correct but its a Darn good plan especially if you needed to ask on a forum what size engine to use
Using a 61 in a sixty sized airplane may not be politically correct but its a Darn good plan especially if you needed to ask on a forum what size engine to use
The reason I asked on a forum was I was disappointed with that engine's performance in a Bruce Tharpe Venture 60, (sixty size). I changed it out to a Tower 75 and there was much improvement. Sooo, I have this OS sitting around and I thought I'd see what others think. OK?
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RE: Sportster 60 power
got a ss 60 at a swap meet. it has no motor mount and I'm danged if I can get one in my stock to fit. i was planning on an older st 61 for power. anybody know offhand what motor mount I should buy at my LHS? can't believe anybody got a four stroker in it, the nose is just too narrow. any help appreciated, thanks.