New .90 gas engine
01-10-2006 | 03:07 PM
#1
Thread Starter
Senior Member
New .90 gas engine
Sorry, I have been informed that it sometimes takes a while for the server to be updated. So I am showing a pic of the new engines for now.
01-10-2006 | 06:56 PM
#8
Senior Member
My Feedback: (4)
RE: New .90 gas engine
I converted a few small gassers, don't remember what size it was...the power on gas should be close to FAI glow...I am quite sure Keith has researched the oil thing...Big Tigres work well on gas if conveted to use a small Walbro....If Keith makes large Tigres into gassers they will have the correct bearings for gasoline, there would be no point in going to all that trouble otherwise...Roller bearings on the stock crank are too hard for the pin...C&H did a few, maybe TKG will be commenting on this...
I converted a 3000 about 13 years ago...It's still around, in a seaplane...We used the stock carb and a Modelectric ignition coil mounted inside the mount..Rimfire spark plug..The owner tried reducing the oil content and quit when the rod siezed on the crank..We replaced the rod and went back up on the oil, no more problems...The glow carb is a little touchy and the coil should have melted years ago, but it's still running, just a few times a year at float fly meets...
I converted a 3000 about 13 years ago...It's still around, in a seaplane...We used the stock carb and a Modelectric ignition coil mounted inside the mount..Rimfire spark plug..The owner tried reducing the oil content and quit when the rod siezed on the crank..We replaced the rod and went back up on the oil, no more problems...The glow carb is a little touchy and the coil should have melted years ago, but it's still running, just a few times a year at float fly meets...
01-10-2006 | 07:06 PM
#9
RE: New .90 gas engine
This makes no sense to me.
Whats the point of a gas engine in .90 size? Can't be fuel economy. A 90 doesn't use that much fuel anyway.
Another thing:
I asked a question about putting needels on the rods. The consensus was that it would wear out the crank pin if you put needles in the rods. Wasn't worth the extra $3 to put bearings on the rods.
People had done it before and it just wasn't worth the hassle.
Now we see this little bitty .90 engine and people are speculating that it's got needles on the rod.
If it DOESN'T have needles on the rods--then it's pointless. The methanol in glow fuel isn't the expensive ingredient. Nitro ain't too bad either. It's all the darned OIL that makes glow fuel so expensive.
So--if there are NOT needles on the rod--then you'll be running 10% oil or more. There goes the price of your fuel again. Might as well be running it on glow and save the weight and cost of the ignition.
I am real interested to know if it has needles. Also interested to know--Whats the point of it? A .90 size gasser?
Whats the point of a gas engine in .90 size? Can't be fuel economy. A 90 doesn't use that much fuel anyway.
Another thing:
I asked a question about putting needels on the rods. The consensus was that it would wear out the crank pin if you put needles in the rods. Wasn't worth the extra $3 to put bearings on the rods.
People had done it before and it just wasn't worth the hassle.Now we see this little bitty .90 engine and people are speculating that it's got needles on the rod.
If it DOESN'T have needles on the rods--then it's pointless. The methanol in glow fuel isn't the expensive ingredient. Nitro ain't too bad either. It's all the darned OIL that makes glow fuel so expensive.
So--if there are NOT needles on the rod--then you'll be running 10% oil or more. There goes the price of your fuel again. Might as well be running it on glow and save the weight and cost of the ignition.
I am real interested to know if it has needles. Also interested to know--Whats the point of it? A .90 size gasser?
01-10-2006 | 07:51 PM
#11
Thread Starter
Senior Member
RE: New .90 gas engine
Guys, this engine was built by us to run as a gasoline engine at 50:1 mix. It produces more power than when run as the stock version on glow. The rod has a needle bearing and the crankshaft utilizes a hardened pin for use with a needle bearing. This is not the worthless conversions you may have seen in the past and has been tested for countless hours without failure. The reasons for an engine like this are endless. They are for sale at 369.00 with supertigre muffler and electronic ignition
1. Economical to operate will run up 30 minutes on ten ounces of fuel at 50:1 mix
2. No oily mess to clean up
3. All components are custom built for gasoline operation
4. Pump style carburetor so place the fuel tank where you like
5. Superior idle and throttle transistion with no deadsticks
6. Electronic ignition so hand starting is easy with no need for glow plugs and glow drivers or field
support equipment
7. No weight penalty the engine weighs 26 ounces and the ignition and battery weight is offset by the
reduced fuel capacity.
8. No rusty bearings due to the hydroscopic glow fuel
9. More power than the glow version all in .60 size case and weight.
10. Some countries cant get glow fuel or nitro and are begging for a small gas engine.
11. Fuel savings will pay for extra cost of the engine.
1. Economical to operate will run up 30 minutes on ten ounces of fuel at 50:1 mix
2. No oily mess to clean up
3. All components are custom built for gasoline operation
4. Pump style carburetor so place the fuel tank where you like
5. Superior idle and throttle transistion with no deadsticks
6. Electronic ignition so hand starting is easy with no need for glow plugs and glow drivers or field
support equipment
7. No weight penalty the engine weighs 26 ounces and the ignition and battery weight is offset by the
reduced fuel capacity.
8. No rusty bearings due to the hydroscopic glow fuel
9. More power than the glow version all in .60 size case and weight.
10. Some countries cant get glow fuel or nitro and are begging for a small gas engine.
11. Fuel savings will pay for extra cost of the engine.
01-10-2006 | 08:00 PM
#12
Thread Starter
Senior Member
RE: New .90 gas engine
We have also developed a gas version of the .51 Supertigre and the 2300. They dont run hot at 50:1 mix and I challenge you to wear one out. The .90 turns a 13x6 APC at 12,500 -12,800 rpm on gasoline and stock Supertigre muffler.
Keith
BME
Keith
BME
01-10-2006 | 08:19 PM
#16
RE: New .90 gas engine
YA...you guys jumped the gun!! You was thinking old soft crankpin like on the old style Supertiger engines. The new engine probably has a real good hardened pin. The small gas engines that hit the market first will be the big selling ones. Other companies will try to do the same. Seems like MVVS has fairly small gassrs now. They already have spin-offs, that look the same basically. RCpilot....the sense is ....lots of guys still like small gassers....period! my 2 Cents Capt,n
01-10-2006 | 08:21 PM
#17
Thread Starter
Senior Member
RE: New .90 gas engine
Sorry but we havent put the .51 into production yet. Still doing field tests to insure that it is a quality product. If i had to guess it will come in at around 325.00.
Keith
BME
Keith
BME
01-10-2006 | 11:25 PM
#21
RE: New .90 gas engine
ORIGINAL: BME
The .90 turns a 13x6 APC at 12,500 -12,800 rpm on gasoline and stock Supertigre muffler.
Keith
BME
The .90 turns a 13x6 APC at 12,500 -12,800 rpm on gasoline and stock Supertigre muffler.
Keith
BME
Weighs 23oz.
Costs $95
I'd have to do an awfull lot of flying to justify the extra $270.
01-10-2006 | 11:30 PM
#22
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From: North Hollywood, CA
RE: New .90 gas engine
Good for you Keith! It looks like an effort to fill a niche that has been void for a very long time. I would not dare me to wear an engine out. I do it, and often. !~) I'd love to see these engines in scale multi engine applications that could really benifit from gas power and stay clean. I take it that these engines are ringed? Molly? hahha, wish.
Joe
Joe
01-11-2006 | 12:35 AM
#23
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From: Baton Rouge, LA
RE: New .90 gas engine
I wish the price was a little lower, this looks cool as heck, have you contacted Super Tigre with your design? Maybe they would start carrying it[8D]
As for power, I'm not sure how you can say it makes more power then glow. My ST G90 turned a 14x7 APC at 10500 RPM on just 10% nitro, a 13x6 APC was nearly 13000 rpm, engine began to over rev.
Whats the rpm on a bigger prop because 13x6 is fairly small for a 90
As for power, I'm not sure how you can say it makes more power then glow. My ST G90 turned a 14x7 APC at 10500 RPM on just 10% nitro, a 13x6 APC was nearly 13000 rpm, engine began to over rev.
Whats the rpm on a bigger prop because 13x6 is fairly small for a 90
01-11-2006 | 12:46 AM
#24
Senior Member
My Feedback: (4)
RE: New .90 gas engine
Bob Laine...Weight saving on a G38 (56 oz VS 66 oz stock) is only 10 oz, hardly cost effective...I think a 2 1/2 lb G26 pulls harder, 17 lbs..See if you can check out your plane with the G38 on it...I haven't tested a G38 for thrust..Airplane speed is very close with either engine...
01-11-2006 | 01:08 AM
#25
Senior Member
My Feedback: (14)
RE: New .90 gas engine
ORIGINAL: BME
Guys, this engine was built by us to run as a gasoline engine at 50:1 mix. It produces more power than when run as the stock version on glow. The rod has a needle bearing and the crankshaft utilizes a hardened pin for use with a needle bearing. This is not the worthless conversions you may have seen in the past and has been tested for countless hours without failure. The reasons for an engine like this are endless. They are for sale at 369.00 with supertigre muffler and electronic ignition
1. Economical to operate will run up 30 minutes on ten ounces of fuel at 50:1 mix
2. No oily mess to clean up
3. All components are custom built for gasoline operation
4. Pump style carburetor so place the fuel tank where you like
5. Superior idle and throttle transistion with no deadsticks
6. Electronic ignition so hand starting is easy with no need for glow plugs and glow drivers or field
support equipment
7. No weight penalty the engine weighs 26 ounces and the ignition and battery weight is offset by the
reduced fuel capacity.
8. No rusty bearings due to the hydroscopic glow fuel
9. More power than the glow version all in .60 size case and weight.
10. Some countries cant get glow fuel or nitro and are begging for a small gas engine.
11. Fuel savings will pay for extra cost of the engine.
----------------
Put me down for one, Keith.
Guys, this engine was built by us to run as a gasoline engine at 50:1 mix. It produces more power than when run as the stock version on glow. The rod has a needle bearing and the crankshaft utilizes a hardened pin for use with a needle bearing. This is not the worthless conversions you may have seen in the past and has been tested for countless hours without failure. The reasons for an engine like this are endless. They are for sale at 369.00 with supertigre muffler and electronic ignition
1. Economical to operate will run up 30 minutes on ten ounces of fuel at 50:1 mix
2. No oily mess to clean up
3. All components are custom built for gasoline operation
4. Pump style carburetor so place the fuel tank where you like
5. Superior idle and throttle transistion with no deadsticks
6. Electronic ignition so hand starting is easy with no need for glow plugs and glow drivers or field
support equipment
7. No weight penalty the engine weighs 26 ounces and the ignition and battery weight is offset by the
reduced fuel capacity.
8. No rusty bearings due to the hydroscopic glow fuel
9. More power than the glow version all in .60 size case and weight.
10. Some countries cant get glow fuel or nitro and are begging for a small gas engine.
11. Fuel savings will pay for extra cost of the engine.
----------------
Put me down for one, Keith.
