Engine Recommendation for Sig 4Star 60
05-11-2005 | 12:43 AM
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From: Seattle, WA,
Engine Recommendation for Sig 4Star 60
Looking for a good reliable 2 stroke for this airplane. I would like it to be on the high end of power recommended for this airplane, which is .75.
05-11-2005 | 07:11 AM
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From: Mission,
TX
RE: Engine Recommendation for Sig 4Star 60
Aerobender
Why do you need additional power? You will be adding more weight too. The 4* 60 flys well with a strong .46. The 4*'s are not pylon racers. You have to be careful as the control surfaces are quite large so flutter is a very real possibility at high speeds. Keep the linkages tight and seal the gaps. These planes fly very well.
My choice for powerplant would be a .61 TT Pro. These are very powerful, light weight and very easy to tune. The reliability is awesome. The second choice would be a Super Tigre .61, IMHO.
Safe Flying!
Why do you need additional power? You will be adding more weight too. The 4* 60 flys well with a strong .46. The 4*'s are not pylon racers. You have to be careful as the control surfaces are quite large so flutter is a very real possibility at high speeds. Keep the linkages tight and seal the gaps. These planes fly very well.
My choice for powerplant would be a .61 TT Pro. These are very powerful, light weight and very easy to tune. The reliability is awesome. The second choice would be a Super Tigre .61, IMHO.
Safe Flying!
05-11-2005 | 07:45 AM
#5
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RE: Engine Recommendation for Sig 4Star 60
4*60s are big floaters. With a .61, they are OK. A .75 or a .91 would be better unless you are a rank novice, in my opinion, especially is you want to learn acro.
As for weight, the .75s and .91s are all now built in a .61 case and are the same weight, around 25-26 ounces with muffler. Check the weights of an OS .91FX and the Magnum .91XLS, both of which I have had in a 4*60. Same weight as a .61, right at 25.5 ounces. Either engine will turn a 12-8 or 13-6 prop nicely, or will swing a 14-6, if you like a bigger prop.
For lighter engine weight, go with a 4-stroke. The Saito .91 weighs less than 20 ounces and the Magnum .91FS weighs 22.5 ounces. Either of these would also be great in a 4*60.
Clip off 1 rib from each side for a better roll rate. It won't hurt the landing, either.
As for weight, the .75s and .91s are all now built in a .61 case and are the same weight, around 25-26 ounces with muffler. Check the weights of an OS .91FX and the Magnum .91XLS, both of which I have had in a 4*60. Same weight as a .61, right at 25.5 ounces. Either engine will turn a 12-8 or 13-6 prop nicely, or will swing a 14-6, if you like a bigger prop.
For lighter engine weight, go with a 4-stroke. The Saito .91 weighs less than 20 ounces and the Magnum .91FS weighs 22.5 ounces. Either of these would also be great in a 4*60.
Clip off 1 rib from each side for a better roll rate. It won't hurt the landing, either.
05-11-2005 | 08:52 PM
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From: New Richmond,
WI
RE: Engine Recommendation for Sig 4Star 60
I'm with ed. Go with the ST.91 if you want to save money and 2 stroke and a .91mag to SA100 if you want to spend a bit more and go with the 4 stroke.
05-11-2005 | 08:55 PM
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From: Bismarck, ND
RE: Engine Recommendation for Sig 4Star 60
Agree that a 91 2 stroke is the way to go. In fact, I can think of no good reason to buy a 61 for a 60-sized plane, with the Super Tigre 90 being such a great value, and, it weighs the same as a 61.
05-11-2005 | 09:30 PM
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From: Loomis,
CA
RE: Engine Recommendation for Sig 4Star 60
ORIGINAL: Ed_Moorman
4*60s are big floaters. With a .61, they are OK. A .75 or a .91 would be better unless you are a rank novice, in my opinion, especially is you want to learn acro.
As for weight, the .75s and .91s are all now built in a .61 case and are the same weight, around 25-26 ounces with muffler. Check the weights of an OS .91FX and the Magnum .91XLS, both of which I have had in a 4*60. Same weight as a .61, right at 25.5 ounces. Either engine will turn a 12-8 or 13-6 prop nicely, or will swing a 14-6, if you like a bigger prop.
For lighter engine weight, go with a 4-stroke. The Saito .91 weighs less than 20 ounces and the Magnum .91FS weighs 22.5 ounces. Either of these would also be great in a 4*60.
Clip off 1 rib from each side for a better roll rate. It won't hurt the landing, either.
4*60s are big floaters. With a .61, they are OK. A .75 or a .91 would be better unless you are a rank novice, in my opinion, especially is you want to learn acro.
As for weight, the .75s and .91s are all now built in a .61 case and are the same weight, around 25-26 ounces with muffler. Check the weights of an OS .91FX and the Magnum .91XLS, both of which I have had in a 4*60. Same weight as a .61, right at 25.5 ounces. Either engine will turn a 12-8 or 13-6 prop nicely, or will swing a 14-6, if you like a bigger prop.
For lighter engine weight, go with a 4-stroke. The Saito .91 weighs less than 20 ounces and the Magnum .91FS weighs 22.5 ounces. Either of these would also be great in a 4*60.
Clip off 1 rib from each side for a better roll rate. It won't hurt the landing, either.
It amazing, 2 strokes used to be the lightweights, and fours weighed too much, now its the other way around, why do the 2 strokes weigh so much now, and the fours lighter with the exception of the thundertiger91... with all of their moving parts...amazing.
05-12-2005 | 10:03 AM
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RE: Engine Recommendation for Sig 4Star 60
Hello; I have an old OS 90 four stroke on mine, and the only other 4 star 60 that I have seen at our field had an OS 91 surpass in it. I agree that the flying characteristics of the 4 star favours the four stroke engines. Big prop turning slower. With weight not being the factor it once was, two strokes of this size aren't so good. I couldn't stand the noise, and those big 2 strokes are so thirsty that they cost more to run in the long run.
05-12-2005 | 11:38 AM
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From: Billings,
MO
RE: Engine Recommendation for Sig 4Star 60
I've seen people use a .75 tower and ST. Also seen the ST90 on a 60 size 4*. My recomendation is go with the ST90. Cheap. reliable. tons of power and weighs the same as the .75. You won't be sorry getting the ST90. Then you can also use it in another plane down the road. When a .75 might not be enough power for your next plane. SUPER TIGRE 90 baybee
05-12-2005 | 06:57 PM
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From: Loomis,
CA
RE: Engine Recommendation for Sig 4Star 60
I totally agree with Iowasilvia, a buddy just got a 90supertigre and its a great engine, there is nothing wrong with throttling back... But the power is there when you want/need it.
05-12-2005 | 08:48 PM
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From: Kathleen,
GA
RE: Engine Recommendation for Sig 4Star 60
Go with a 91 4stroke you cant go wrong. take one rib bay off each wing and add 1 in. to the rudder. Changes the 4 Star 60 into a real go getter. use a 14X6 prop.
05-12-2005 | 08:58 PM
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RE: Engine Recommendation for Sig 4Star 60
I flew my 4*60 ARF this past winter with one of the EVolution 1.00 NT's.... AWESOME AWESOME AWESOME combo!
The plane balanced perfectly without any additional weight in the nose or tail, and with a 14x6 prop (on skis no less) it is just a ball of fun!
I would want no less than a .91 if you plan to have some fun with it, although it will fly on a .61 - it all depends upon what you plan to do.
I dont see any issues with the airframe with the little extra power, it is pretty well made and I inspected my ARF's firewall for good glue joints/bracing before I installed the engine.
AJC
The plane balanced perfectly without any additional weight in the nose or tail, and with a 14x6 prop (on skis no less) it is just a ball of fun!
I would want no less than a .91 if you plan to have some fun with it, although it will fly on a .61 - it all depends upon what you plan to do.
I dont see any issues with the airframe with the little extra power, it is pretty well made and I inspected my ARF's firewall for good glue joints/bracing before I installed the engine.
AJC
05-12-2005 | 11:23 PM
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From: Jacksonville, FL
RE: Engine Recommendation for Sig 4Star 60
I have a ST 75 in mine. Not thrilled with the power. The 90 would of been a better choice. Also the 4* 60 is a tail heavy plane it needs a heavy motor up front to balance it out. The ST 75 and 90 weigh almost identical
05-13-2005 | 08:30 AM
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RE: Engine Recommendation for Sig 4Star 60
I flew mine originally with a TT61 Pro. Flew very well with good power. The back of the muffler fell off (meticulous maintenance always pays off
) and I crashed short of the runway. Clipped a bay off each wing and installed an OS91FX. Lots of fun and really doesn't land any worse than before. But my two cents says the 61 was fine unless you just want mucho power.
) and I crashed short of the runway. Clipped a bay off each wing and installed an OS91FX. Lots of fun and really doesn't land any worse than before. But my two cents says the 61 was fine unless you just want mucho power.
05-13-2005 | 01:18 PM
#18
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RE: Engine Recommendation for Sig 4Star 60
ORIGINAL: old propnut
Go with a 91 4stroke you cant go wrong. take one rib bay off each
wing and add 1 in. to the rudder. Changes the 4 Star 60 into a real
go getter. use a 14X6 prop.
Go with a 91 4stroke you cant go wrong. take one rib bay off each
wing and add 1 in. to the rudder. Changes the 4 Star 60 into a real
go getter. use a 14X6 prop.
The Magnum .91FS can usually be had for around $150.00....perfect
fot that size sport plane.
FBD.
05-13-2005 | 03:50 PM
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From: New Richmond,
WI
RE: Engine Recommendation for Sig 4Star 60
ORIGINAL: Aerobender
The 0.91 2 stroke is larger than Sig recommends for this model. Any issues there?
The 0.91 2 stroke is larger than Sig recommends for this model. Any issues there?
I was recently in the market for a motor like this and was looking for a .91mag in the $150 dollar range and best I could find was closer to $200--I bit the bullet and paid an extra $65.00 and bought the SA100 banking that I will not plant it in the ground and will be flying it for a long time.---BTW I would have bought the ST.91 a year ago and still think it is a lot of bag for the buck.
05-14-2005 | 10:45 PM
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From: Harsens Island,
MI
RE: Engine Recommendation for Sig 4Star 60
I flew my 4 Star with Supre Tigre .61, .75, and .90. The .90 was definately the best. Even with the .90 you will not get unlimited verticle but its pretty close to it. I used the largest prop ST recommended, can't remember now. Nice flier. Radio transmitter glitched and killed it.
bob
bob
05-15-2005 | 10:25 AM
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From: New Richmond,
WI
RE: Engine Recommendation for Sig 4Star 60
ORIGINAL: rjbranchii
I flew my 4 Star with Supre Tigre .61, .75, and .90. The .90 was definately the best. Even with the .90 you will not get unlimited verticle but its pretty close to it. I used the largest prop ST recommended, can't remember now. Nice flier. Radio transmitter glitched and killed it.
bob
I flew my 4 Star with Supre Tigre .61, .75, and .90. The .90 was definately the best. Even with the .90 you will not get unlimited verticle but its pretty close to it. I used the largest prop ST recommended, can't remember now. Nice flier. Radio transmitter glitched and killed it.
bob
A good running ST90 with a large enough prop (15 x4 to 15 x6) should pull an 8 pound plane unlimited. It won't be dramatic, but it will go strait up as high as you want it to. I know that is not one of the recommended props(11-8 to 13x7). The 15 x4 or 5 zinger would be a good match--(not far from a good 13 x7 for load)
A 15 x4 or 5 pro zinger would work if you are worried about over loading the motor.
http://www2.towerhobbies.com/cgi-bin...?&I=LXFHA2&P=7
05-18-2005 | 06:29 PM
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From: Kenosha,
WI
RE: Engine Recommendation for Sig 4Star 60
My buddy just put a 4*60 just last week and installed a RCV91-Cd and just loves it. The motor has a great sound and pulls the plane around with great authority. He bought the motor for the "gee wiz" kind of thing but has really grown to like it alot. Heck, I was so impressed that I am going to get one my self. The sell for around $229.00 and have a couple of more oz than the other motors mentioned earlier, but they sure are a neat little motor.
A link to the web site is below, (hopefully)
[link=http://www.rcvengines.com/model_home_page_full.htm]RCV91-CD[/link]
A link to the web site is below, (hopefully)
[link=http://www.rcvengines.com/model_home_page_full.htm]RCV91-CD[/link]
05-18-2005 | 09:20 PM
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From: Boise,
ID
RE: Engine Recommendation for Sig 4Star 60
well sir....you have gotten a pile of info from all the boys...seems to be pretty good stuff too in all sorta varities. my only suggestion is to stay away from engines made in china...quality contol is below a joke [:'(]
have fun....
have fun....
