Club Laser?
04-03-2015, 09:58 AM
#401
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Fiery, you are quite welcome. I try my best to get things done quickly!
Jeff, I would very much like to do an inline...and flat twins, radials, a V4 anyone? There is so much I would like to do, the problem is time and also the fact that a new engine like that would need to be petrol. We are currently working on that but I am yet to get a carb to work as I want it to.
Jeff, I would very much like to do an inline...and flat twins, radials, a V4 anyone? There is so much I would like to do, the problem is time and also the fact that a new engine like that would need to be petrol. We are currently working on that but I am yet to get a carb to work as I want it to.
09-08-2015, 09:29 AM
#402
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Hello Jon,
I read a build thread on the ESM P-39 on RCG that you participated in some years ago. In it you showed your build of that model with a Laser V-twin engine. You reported on the maiden flight, in which the model suffered some nose damage due to a landing mishap, but then you dropped out of the thread. AIR, the only question was one of how well your engine installation would cool in flight. Took me a while to find you but I'd like to know how well that engine installation worked out.
TIA,
CR
I read a build thread on the ESM P-39 on RCG that you participated in some years ago. In it you showed your build of that model with a Laser V-twin engine. You reported on the maiden flight, in which the model suffered some nose damage due to a landing mishap, but then you dropped out of the thread. AIR, the only question was one of how well your engine installation would cool in flight. Took me a while to find you but I'd like to know how well that engine installation worked out.
TIA,
CR
09-08-2015, 10:25 AM
#403
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Hi Charley
to my astonishment the engine cools perfectly. I have had no issues with the engine overheating. The only heat issue I have had is the crappy esm fiberglass resin goes all soft when the engine mount warms up so that needs some work.
The biggest issue I have had with the model is the nose leg and it was also not the easiest to land. I think I have the landing sorted now and plan another test flight soon.
I say test flight as the model is currently underpowered but that might be down to prop selection as I started using cheap hobbyking props as I was tired of breaking the expensive ones. Now I can land properly I will go back and try out the correct props. In retrospect I should have used the 300v, but at the time I didnt realise how big and heavy the model would end up. If I choose I could always up the engine to a 300, but in truth I would like to keep the 240v and if the model is not totally ballistic then so be it
to my astonishment the engine cools perfectly. I have had no issues with the engine overheating. The only heat issue I have had is the crappy esm fiberglass resin goes all soft when the engine mount warms up so that needs some work.
The biggest issue I have had with the model is the nose leg and it was also not the easiest to land. I think I have the landing sorted now and plan another test flight soon.
I say test flight as the model is currently underpowered but that might be down to prop selection as I started using cheap hobbyking props as I was tired of breaking the expensive ones. Now I can land properly I will go back and try out the correct props. In retrospect I should have used the 300v, but at the time I didnt realise how big and heavy the model would end up. If I choose I could always up the engine to a 300, but in truth I would like to keep the 240v and if the model is not totally ballistic then so be it
11-25-2015, 04:56 PM
#404
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Has anyone ever ran a 22x6 on a 300v? Looking at zoar axial props and I know 20x8 is ideal for the 300 but wondering if the 22x6 is too much prop? lasers web sight has the 22 listed for that motor and Im trying to look more scale on a proctor albatross but don't want to spend 50 on a pro that is too big!
12-18-2015, 06:32 PM
#409
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Hi Jon
Not lost, rather until a light bulb went on in my head a moment ago I could not figure why it had been interfered with.
The photographs below tell the story.
This is the engine I communicated with you about earlier this year. A rare beast by all accounts
Restoration is near complete. It needed a general clean up from years of congealed castor varnish, new races, and straightening of the exhaust valve stem. You supplied the new prop driver which was much appreciated. The old one was split, presumably following an "arrival".
My take is that the extra hole for the shortened grub screw is to permit oiling of the valve gear without removal of the cover. A reasonable modification and now I understand it's purpose I can live with it.
I have located a couple of bits to finish restoration of the carburettor from *bay and it will then be ready to run. I will report on that on the 'other' forum for lovers of compression ignition.
Not lost, rather until a light bulb went on in my head a moment ago I could not figure why it had been interfered with.
The photographs below tell the story.
This is the engine I communicated with you about earlier this year. A rare beast by all accounts
Restoration is near complete. It needed a general clean up from years of congealed castor varnish, new races, and straightening of the exhaust valve stem. You supplied the new prop driver which was much appreciated. The old one was split, presumably following an "arrival".
My take is that the extra hole for the shortened grub screw is to permit oiling of the valve gear without removal of the cover. A reasonable modification and now I understand it's purpose I can live with it.
I have located a couple of bits to finish restoration of the carburettor from *bay and it will then be ready to run. I will report on that on the 'other' forum for lovers of compression ignition.
Last edited by fiery; 12-18-2015 at 06:34 PM.
12-19-2015, 12:57 AM
#410
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Jeez that engine is SERIOUSLY old! Should be good for a bit of fun though.
If you or any of your compression ignition loving friends on the 'other' forum are interested I do now have 80 and 100 diesels available again. That is to say, I can build you one if you like. They are a bit better than the old ones but still require some understanding and patience to get the best out of them. The 100 swings a 17x6 apc prop at about 6400rpm. I have a video here on me testing one on a 14x7 just to get the revs up while it ran in.
https://www.youtube.com/watch?v=zQwO...ature=youtu.be
If you or any of your compression ignition loving friends on the 'other' forum are interested I do now have 80 and 100 diesels available again. That is to say, I can build you one if you like. They are a bit better than the old ones but still require some understanding and patience to get the best out of them. The 100 swings a 17x6 apc prop at about 6400rpm. I have a video here on me testing one on a 14x7 just to get the revs up while it ran in.
https://www.youtube.com/watch?v=zQwO...ature=youtu.be
12-20-2015, 04:13 AM
#413
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Jon, most of the Oily Hand guys have seen this picture of my old high compression Saito, 15.5 to 1 cr, run on Davis Diesel fuel. It turns a 13.5x8 Bolly at 8,700+. It's limited to that prop since there is no compression adjustment.
03-18-2016, 08:33 AM
#416
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I just bought an older 200v after trying to get one for a couple years. This version has the Super Tigre carbs. Are the Irvine carbs a lot better than these carbs? Also what is the best glow plugs to use on this engine? I plan on flying this engine in a TF Staggerwing but have a feeling I am going to have to ad a lot of nose weight.
03-19-2016, 01:21 AM
#417
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If the ST carbs are in good condition they will work just fine. You can get a bit more power with our current carbs but you need to work out if a few hundred rpm is worth the £70 price tag for the two carbs.
I am currently off work but will be back in a week. email me at [email protected] and we can sort it all out
I am currently off work but will be back in a week. email me at [email protected] and we can sort it all out
04-07-2016, 08:36 AM
#418
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Hey Guys,
Yeaaayyyy..... My 120 finally got here. Ordered it in August of last year and it arrived yesterday.
Anyone running the 120? if so what props are you using after the 15x6 for break in listed in the manual? What rpms are you seeing on your set ups?
They suggest a 11oz tank. Any fuel usage reports?
The 120 will replace a DLE20 in my VQ Hurricane and is the third power-train set up in that plane. First was electric, then the DLE and now the Laser. So I'm not sure how much room I have left for various sized tanks due to the mods to the nose for reinforcement over the years. If need be the Dremel will have to ask the Hurri to say ahhhhh..... to create more room.
What tank size should I shoot for to get 10 or 12 minute flights?
Joe
Yeaaayyyy..... My 120 finally got here. Ordered it in August of last year and it arrived yesterday.
Anyone running the 120? if so what props are you using after the 15x6 for break in listed in the manual? What rpms are you seeing on your set ups?
They suggest a 11oz tank. Any fuel usage reports?
The 120 will replace a DLE20 in my VQ Hurricane and is the third power-train set up in that plane. First was electric, then the DLE and now the Laser. So I'm not sure how much room I have left for various sized tanks due to the mods to the nose for reinforcement over the years. If need be the Dremel will have to ask the Hurri to say ahhhhh..... to create more room.
What tank size should I shoot for to get 10 or 12 minute flights?
Joe
04-07-2016, 11:04 AM
#419
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Hi Joe
I have not sent any 120's out for weeks. that must have been super slow postage! Also you ordered in August?? did you order through Proctor? if so I apologise about the epic lead time. There was a breakdown in transatlantic communication and your order somehow fell through the cracks so I'm very sorry about that.
The 120 will monster your hurricane. We normally recommend 80's for that model and I am building a similar Hurricane at the moment and have an 80 fitted.
Prop wise a 15x8 would be great after run in and you can expect about 8400 or so on an apc with 5% nitro fuel. If you want speed then I guess you could try a 14x10 but that would make the hurricane a missile I expect!
The fuel tank needs to be no more than 11oz really. I get decent flight times from my 155 on a 12oz tank and obviously the 120 uses less fuel. If you run on low nitro fuel you don't use anywhere near as much and our fuel usage is about half that of a similar saito. The only thing to watch with the tank is getting it low enough for the carb. As the model you have is a bit small for the engine you might have trouble. Just get it as low as you can and it should be ok. Email me direct at [email protected] if you need anything else
I have not sent any 120's out for weeks. that must have been super slow postage! Also you ordered in August?? did you order through Proctor? if so I apologise about the epic lead time. There was a breakdown in transatlantic communication and your order somehow fell through the cracks so I'm very sorry about that.
The 120 will monster your hurricane. We normally recommend 80's for that model and I am building a similar Hurricane at the moment and have an 80 fitted.
Prop wise a 15x8 would be great after run in and you can expect about 8400 or so on an apc with 5% nitro fuel. If you want speed then I guess you could try a 14x10 but that would make the hurricane a missile I expect!
The fuel tank needs to be no more than 11oz really. I get decent flight times from my 155 on a 12oz tank and obviously the 120 uses less fuel. If you run on low nitro fuel you don't use anywhere near as much and our fuel usage is about half that of a similar saito. The only thing to watch with the tank is getting it low enough for the carb. As the model you have is a bit small for the engine you might have trouble. Just get it as low as you can and it should be ok. Email me direct at [email protected] if you need anything else
04-07-2016, 11:31 AM
#421
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Thanks Carosel43,
Yup that's the one... I completed an entire OS 53cc FF modification project in the time it took to get the 120.... 8,400 on a 15x8 is good. That's the range we fly in. I have some old Graupner 15x8x3 that were slated for the DLE. The DLE turns both a 15 and 16 3 blade well enough to fly a 60 sized warbird very well, but I'm tired of the smell and sound.
Do you think I have a chance of spinning the extra blade if I run 15% Cool Power? I also have some MAS 15x8x3 that are from before MAS changed their hub design. Everyone's best guess is the hubs allow a little more flex and allow the prop to get to a higher rpm. I'm well aware of the loss of efficiency on the 3 blade. But we fly them as much as we can.
Typically, I fly around at 1/2 - 3/4 throttle. We match speeds and fly together in packs of 5-8 60 sizes warbirds. So overall speed is not a big deal. I'd rather use the power to spin a cool prop.
Joe
Yup that's the one... I completed an entire OS 53cc FF modification project in the time it took to get the 120.... 8,400 on a 15x8 is good. That's the range we fly in. I have some old Graupner 15x8x3 that were slated for the DLE. The DLE turns both a 15 and 16 3 blade well enough to fly a 60 sized warbird very well, but I'm tired of the smell and sound.
Do you think I have a chance of spinning the extra blade if I run 15% Cool Power? I also have some MAS 15x8x3 that are from before MAS changed their hub design. Everyone's best guess is the hubs allow a little more flex and allow the prop to get to a higher rpm. I'm well aware of the loss of efficiency on the 3 blade. But we fly them as much as we can.
Typically, I fly around at 1/2 - 3/4 throttle. We match speeds and fly together in packs of 5-8 60 sizes warbirds. So overall speed is not a big deal. I'd rather use the power to spin a cool prop.
Joe
04-07-2016, 01:21 PM
#422
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Hi Joe
The 120 responds to nitro more than most of our engines. you can try the 15% but it will really hurt your fuel consumption. As for the 3 blade try the 15x8 but if you are getting below 8k then its probably asking too much
The 120 responds to nitro more than most of our engines. you can try the 15% but it will really hurt your fuel consumption. As for the 3 blade try the 15x8 but if you are getting below 8k then its probably asking too much
04-07-2016, 01:37 PM
#423
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Thanks, I'll try some props once I get some time on it with 15%. I'm thinking I'll probably wind up with a 15x8x2 on 15% by the sound of it. I'll post what I get when I start testing.
Joe
Joe
