gas twins
01-06-2008 | 01:18 AM
#1
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gas twins
Looking for a twin in the 45-50cc range narrow enough to fit within a 240mm wide cowl WITHOUT having to cut clearance holes for the plug caps. The Roto 50 is almost there, not quite. 3W48 is too wide, way too expensive. What else is out there? Don't want glow for this plane.
01-06-2008 | 10:34 AM
#4
RE: gas twins
Trt this one for your plane:LS Pro engines Has a 50cc twin that is 9 1/4" cap to Cap:
http://www.lsproengines.com/lspro_006.htm
http://www.lsproengines.com/lspro_016.htm
Edited to remove comma (,) after 1st link. Works fine now.
http://www.lsproengines.com/lspro_006.htm
http://www.lsproengines.com/lspro_016.htm
Edited to remove comma (,) after 1st link. Works fine now.
01-06-2008 | 11:58 AM
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From: Black Diamond,
AB, CANADA
RE: gas twins
Try RC Guys in Canada, they have a 48 cc twin that may due the trick
http://www.rcguys.com/engines.html
Wilki
http://www.rcguys.com/engines.html
Wilki
01-06-2008 | 04:13 PM
#9
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RE: gas twins
Thanks for the replies. Looks like the LS Pro is the winner by a scant 1/8 inch. There's actually a tad more, maybe 1/2 overall, which will work. At least I know there's something out there. I thought my ZDZ-50NG was going to fit, but it missed by 1/2 inch with the plug cap on (this is for a 1/4 scale BirdDog). I'd rather not have to cut the cowl, even underneath, but I really want to use this engine, although the thought of the twin is attractive, since the cowl has those "nostril" intake holes in the front, you'd be able to see the cylinders. Lots of time to think it over
.
.
01-06-2008 | 05:41 PM
#10
RE: gas twins
Give Larry a call @ LS Pro he would really like to hear from you and will discuss any
aspects of this engine you would like to hear about. I am going to pick one up late this
year to put in a Nosen Mr. Mulligan. Also thinking of trying out the 26cc he has for my
quarter scale Pitts S2B.
aspects of this engine you would like to hear about. I am going to pick one up late this
year to put in a Nosen Mr. Mulligan. Also thinking of trying out the 26cc he has for my
quarter scale Pitts S2B.
01-06-2008 | 05:51 PM
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From: mims,
FL
RE: gas twins
ORIGINAL: mrbigg
I wonder if it's possible to build a V-Twin 2 Stroke. Kind of like the European Laser 4-Strokes. It would probaly make alot of scale guys happy.
I wonder if it's possible to build a V-Twin 2 Stroke. Kind of like the European Laser 4-Strokes. It would probaly make alot of scale guys happy.
01-06-2008 | 08:08 PM
#12
My Feedback: (43)
RE: gas twins
2-stroke v-twin is possible if it is a port induction and not reed valve. You will have to have two carbs and two fuel systems, or at least two clunks in the tank. It would also require a pressurized fuel system, or suction feed since the two pistons would cancel out changes in crankcase volume to operate a walbro type pump. It is probably not effective, but I think it is possible. It would sound like it is turning twice as fast as it really is since there would be two power strokes per revolution.
01-06-2008 | 11:50 PM
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From: The Villages, Florida NJ
RE: gas twins
ORIGINAL: Bill Diedrich
Trt this one for your plane:LS Pro engines Has a 50cc twin that is 9 1/4" cap to Cap:
http://www.lsproengines.com/lspro_006.htm
http://www.lsproengines.com/lspro_016.htm
Edited to remove comma (,) after 1st link. Works fine now.
Trt this one for your plane:LS Pro engines Has a 50cc twin that is 9 1/4" cap to Cap:
http://www.lsproengines.com/lspro_006.htm
http://www.lsproengines.com/lspro_016.htm
Edited to remove comma (,) after 1st link. Works fine now.
01-07-2008 | 11:35 AM
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From: Pasadena,
CA
RE: gas twins
ORIGINAL: JeffH
2-stroke v-twin is possible if it is a port induction and not reed valve. You will have to have two carbs and two fuel systems, or at least two clunks in the tank. It would also require a pressurized fuel system, or suction feed since the two pistons would cancel out changes in crankcase volume to operate a walbro type pump. It is probably not effective, but I think it is possible. It would sound like it is turning twice as fast as it really is since there would be two power strokes per revolution.
2-stroke v-twin is possible if it is a port induction and not reed valve. You will have to have two carbs and two fuel systems, or at least two clunks in the tank. It would also require a pressurized fuel system, or suction feed since the two pistons would cancel out changes in crankcase volume to operate a walbro type pump. It is probably not effective, but I think it is possible. It would sound like it is turning twice as fast as it really is since there would be two power strokes per revolution.
khodges, remember to take any right thrust of the engine into account when measuring your clearance. Very often the left cylinder sits quite a bit further off center than the right cylinder due to the right thrust.
01-07-2008 | 06:30 PM
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From: The Villages, Florida NJ
RE: gas twins
ORIGINAL: JeffH
A single crankcase V-Twin 2-stroke could possibly be made if both pistons were at TDC and firing at the same time, but it would be hard to balance and probably not that efficient.
A single crankcase V-Twin 2-stroke could possibly be made if both pistons were at TDC and firing at the same time, but it would be hard to balance and probably not that efficient.
Edited to remove profanity.
01-07-2008 | 10:06 PM
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From: mims,
FL
RE: gas twins
[quote]ORIGINAL: soarrich
the crank would have to have different strokes with higher piston speed on the rear cylinder to catch up. it wouldent flow right and would be very inefficient.
Edited to remove profanity from previous poster.
ORIGINAL: DKjens
Actually I think you'll find that with a two throw crankshaft to get both cylinders a TDC at the same time it will work fine, and be pretty smooth. The primary imbalance of one cylinder cancels out the secondary imbalance of the other and vise verse if it is a 90* v twin. Think Ducati, Yamaha and Suzuki twins, the Honda Shadow v twin had off set journals to give some character to the motor, HDs are just messed up balance wise.
ORIGINAL: JeffH
A single crankcase V-Twin 2-stroke could possibly be made if both pistons were at TDC and firing at the same time, but it would be hard to balance and probably not that efficient.
A single crankcase V-Twin 2-stroke could possibly be made if both pistons were at TDC and firing at the same time, but it would be hard to balance and probably not that efficient.
Edited to remove profanity from previous poster.
01-07-2008 | 10:17 PM
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From: Nashville,
NC
RE: gas twins
ORIGINAL: khodges
Thanks for the replies. Looks like the LS Pro is the winner by a scant 1/8 inch. There's actually a tad more, maybe 1/2 overall, which will work. At least I know there's something out there. I thought my ZDZ-50NG was going to fit, but it missed by 1/2 inch with the plug cap on (this is for a 1/4 scale BirdDog). I'd rather not have to cut the cowl, even underneath, but I really want to use this engine, although the thought of the twin is attractive, since the cowl has those "nostril" intake holes in the front, you'd be able to see the cylinders. Lots of time to think it over.
Thanks for the replies. Looks like the LS Pro is the winner by a scant 1/8 inch. There's actually a tad more, maybe 1/2 overall, which will work. At least I know there's something out there. I thought my ZDZ-50NG was going to fit, but it missed by 1/2 inch with the plug cap on (this is for a 1/4 scale BirdDog). I'd rather not have to cut the cowl, even underneath, but I really want to use this engine, although the thought of the twin is attractive, since the cowl has those "nostril" intake holes in the front, you'd be able to see the cylinders. Lots of time to think it over
.
How are going to cool it if you don't open the cowl up ?
01-08-2008 | 06:55 PM
#18
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RE: gas twins
ORIGINAL: skiman762
How are going to cool it if you don't open the cowl up ?
ORIGINAL: khodges
Thanks for the replies. Looks like the LS Pro is the winner by a scant 1/8 inch. There's actually a tad more, maybe 1/2 overall, which will work. At least I know there's something out there. I thought my ZDZ-50NG was going to fit, but it missed by 1/2 inch with the plug cap on (this is for a 1/4 scale BirdDog). I'd rather not have to cut the cowl, even underneath, but I really want to use this engine, although the thought of the twin is attractive, since the cowl has those "nostril" intake holes in the front, you'd be able to see the cylinders. Lots of time to think it over.
Thanks for the replies. Looks like the LS Pro is the winner by a scant 1/8 inch. There's actually a tad more, maybe 1/2 overall, which will work. At least I know there's something out there. I thought my ZDZ-50NG was going to fit, but it missed by 1/2 inch with the plug cap on (this is for a 1/4 scale BirdDog). I'd rather not have to cut the cowl, even underneath, but I really want to use this engine, although the thought of the twin is attractive, since the cowl has those "nostril" intake holes in the front, you'd be able to see the cylinders. Lots of time to think it over
.
How are going to cool it if you don't open the cowl up ?
01-09-2008 | 10:11 PM
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From: Tucson,
AZ
RE: gas twins
I'm not being a wise guy, I'd really like to know why you'd want a 50CC size twin?
Sound? Or you want it to look like a lycoming?
Multi cyclinder 4 strokes, especially radials, have way less HP then their single cyclinder counter parts. Is this true of gas?
Sound? Or you want it to look like a lycoming?
Multi cyclinder 4 strokes, especially radials, have way less HP then their single cyclinder counter parts. Is this true of gas?
01-22-2008 | 04:40 PM
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From: Yankalilla, AUSTRALIA
RE: gas twins
ORIGINAL: Bill Diedrich
Trt this one for your plane:LS Pro engines Has a 50cc twin that is 9 1/4" cap to Cap:
http://www.lsproengines.com/lspro_006.htm
http://www.lsproengines.com/lspro_016.htm
Edited to remove comma (,) after 1st link. Works fine now.
Trt this one for your plane:LS Pro engines Has a 50cc twin that is 9 1/4" cap to Cap:
http://www.lsproengines.com/lspro_006.htm
http://www.lsproengines.com/lspro_016.htm
Edited to remove comma (,) after 1st link. Works fine now.
had to edit it out . had my info on it[
]
01-22-2008 | 06:27 PM
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From: The Villages, Florida NJ
RE: gas twins
Yes, and when you have a problem you'll call LS Pro, because you don't speek Chinese and don't want to pay $50 each way to China for service. I hope LS Pro has the Ba... to tell you where to get it serviced.
01-22-2008 | 09:19 PM
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From: AUBURN,
GA
RE: gas twins
even if it will fit in the cowl one plug will probably still have to stick out one side because of the off set for right thrust.
Edit
Just read your post about no right thrust but ??????
Milton
Edit
Just read your post about no right thrust but ??????
Milton
01-22-2008 | 09:42 PM
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From: Yankalilla, AUSTRALIA
RE: gas twins
Yeah Rich just relax , the amazing thing is. all the people you can buy from in Hong Kong and elsewhere in that part of the world , all speak pretty good engrish....Ha-so ...
Obviously shipping is much cheaper for us , like $24.77 for a 26cc SV engine from United Hobby and it runs really good....APC 16x8 @ 8000....another one I got from HK had a crook carby , they sent me a new one and I had to send back the crook one .....cost me $7.00
Obviously shipping is much cheaper for us , like $24.77 for a 26cc SV engine from United Hobby and it runs really good....APC 16x8 @ 8000....another one I got from HK had a crook carby , they sent me a new one and I had to send back the crook one .....cost me $7.00
