Os 1.60fx
01-07-2007 | 02:31 AM
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From: Sydney, AUSTRALIA
Os 1.60fx
hey guys i seem to be having some problems running this motor im not a begginer and i know how to tune a motor but this one has got me totally baffled let me tell you my setup...
Im running this motor on a gp cap 232 27% and its a new motor and im also running a bisson pitts muffler the fuel iam using is 15%nitro and 15%synthetic and 5% castor. The motor is on its side,,
ok now here is my problem, i tune the motor in at less than half a tank and make sure its all good, transition good and not lean, a nice smoke trail, now i fill it up and fly, first 3-4 mins is good then as the tank gets lower the motor goes slower then after a few more mintues it eventually stops now its seams to me that as the tank gets lower its leans out to the point it stops But there is still smoke comming out telling me its rich. and to me it had the smell of too lean but there is still the smoke comming out of the exhaust...
im running a 3 line pick up,
i dont have a problem with the idle or anything i just cant get it to run well in the air...
so when i gets it back to the pits i richen the high needle some more and it still seams the same....i totally lost...
all ur help would be appreciated
steve
Im running this motor on a gp cap 232 27% and its a new motor and im also running a bisson pitts muffler the fuel iam using is 15%nitro and 15%synthetic and 5% castor. The motor is on its side,,
ok now here is my problem, i tune the motor in at less than half a tank and make sure its all good, transition good and not lean, a nice smoke trail, now i fill it up and fly, first 3-4 mins is good then as the tank gets lower the motor goes slower then after a few more mintues it eventually stops now its seams to me that as the tank gets lower its leans out to the point it stops But there is still smoke comming out telling me its rich. and to me it had the smell of too lean but there is still the smoke comming out of the exhaust...
im running a 3 line pick up,
i dont have a problem with the idle or anything i just cant get it to run well in the air...
so when i gets it back to the pits i richen the high needle some more and it still seams the same....i totally lost...
all ur help would be appreciated
steve
01-07-2007 | 03:09 AM
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From: Warialda NSW, AUSTRALIA
RE: Os 1.60fx
G'day Steve,
I'm running the same motor, same muffler, motor on it's side, No castor, 18 to 20% Coolpower synthetic, & 10% nitro, OS #8 Plug, in a 27% CMPro Giles 202. The motor is 2 years old & the only thing I changed was to Stainless steel bearings, brilliant.
What prop are you running?
How much running has the motor had?
Sounds like it needs more running in. It will get better as it runs in, & more pitch means you don't need to run at full throttle to fly.
And you MUST make sure that you have sufficient cooling air passing through the cowl, does it do all these things with the cowl off? If not, you need more cooling air, usually there is not enough air escaping from the cowl, so the hot air just circulates around & overheats the motor.
You need at least 2 1/2 to 3 times the air outlet, compared to air inlet, around the prop.
Also make sure your tank height is right, tank centreline level with or no more than 3/8" or 10mm below the fuel nipple on the carby.
I ran my 160FX in on a 16x14 APC, that was all I could get, at the time, then I tried a 16x10 in a CMPro Katana, perfect.
In the Giles, I tried a 18x8, needed too many revs to keep it in the air, so tried a 16x10 APC, & now I'm flying it with a 17x10 APC. Much better for that plane, feel free to try different props.
The 160FX loves plenty of pitch, has huge torque, so run a decent prop.
I'm running the same motor, same muffler, motor on it's side, No castor, 18 to 20% Coolpower synthetic, & 10% nitro, OS #8 Plug, in a 27% CMPro Giles 202. The motor is 2 years old & the only thing I changed was to Stainless steel bearings, brilliant.
What prop are you running?
How much running has the motor had?
Sounds like it needs more running in. It will get better as it runs in, & more pitch means you don't need to run at full throttle to fly.
And you MUST make sure that you have sufficient cooling air passing through the cowl, does it do all these things with the cowl off? If not, you need more cooling air, usually there is not enough air escaping from the cowl, so the hot air just circulates around & overheats the motor.
You need at least 2 1/2 to 3 times the air outlet, compared to air inlet, around the prop.
Also make sure your tank height is right, tank centreline level with or no more than 3/8" or 10mm below the fuel nipple on the carby.
I ran my 160FX in on a 16x14 APC, that was all I could get, at the time, then I tried a 16x10 in a CMPro Katana, perfect.
In the Giles, I tried a 18x8, needed too many revs to keep it in the air, so tried a 16x10 APC, & now I'm flying it with a 17x10 APC. Much better for that plane, feel free to try different props.
The 160FX loves plenty of pitch, has huge torque, so run a decent prop.
01-07-2007 | 03:32 AM
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From: Bonn/Germany Ft Lauderdale/FL,
AB, GERMANY
RE: Os 1.60fx
Steve,
sound to me like a heat problem , maybe to big prop and less cooling air
a friend of mine had the same problem, he took of the engine hood /frontend and flew without it it was fine with lots of fresh air and a smaller prop with little more pitch.he opened up the hood and it was fine.
dont forget to open up also the vents where the air can go out of the hood ,normaly the can be a little bigger then the ones for incoming fresh cooling air.
for leaning out a little in the air ,normally the rpms go up a little
but check your fuel tank , pressure side and the fuel lines with picup inside, most of the engine problems on our field got solved by a good fuel tank setup
cheers
sound to me like a heat problem , maybe to big prop and less cooling air
a friend of mine had the same problem, he took of the engine hood /frontend and flew without it it was fine with lots of fresh air and a smaller prop with little more pitch.he opened up the hood and it was fine.
dont forget to open up also the vents where the air can go out of the hood ,normaly the can be a little bigger then the ones for incoming fresh cooling air.
for leaning out a little in the air ,normally the rpms go up a little
but check your fuel tank , pressure side and the fuel lines with picup inside, most of the engine problems on our field got solved by a good fuel tank setup
cheers
01-07-2007 | 03:35 AM
#4
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RE: Os 1.60fx
ORIGINAL: alan0899
G'day Steve,
I'm running the same motor, same muffler, motor on it's side, No castor, 18 to 20% Coolpower synthetic, & 10% nitro, OS #8 Plug, in a 27% CMPro Giles 202. The motor is 2 years old & the only thing I changed was to Stainless steel bearings, brilliant.
What prop are you running?
How much running has the motor had?
Sounds like it needs more running in. It will get better as it runs in, & more pitch means you don't need to run at full throttle to fly.
And you MUST make sure that you have sufficient cooling air passing through the cowl, does it do all these things with the cowl off? If not, you need more cooling air, usually there is not enough air escaping from the cowl, so the hot air just circulates around & overheats the motor.
You need at least 2 1/2 to 3 times the air outlet, compared to air inlet, around the prop.
Also make sure your tank height is right, tank centreline level with or no more than 3/8" or 10mm below the fuel nipple on the carby.
I ran my 160FX in on a 16x14 APC, that was all I could get, at the time, then I tried a 16x10 in a CMPro Katana, perfect.
In the Giles, I tried a 18x8, needed too many revs to keep it in the air, so tried a 16x10 APC, & now I'm flying it with a 17x10 APC. Much better for that plane, feel free to try different props.
The 160FX loves plenty of pitch, has huge torque, so run a decent prop.
G'day Steve,
I'm running the same motor, same muffler, motor on it's side, No castor, 18 to 20% Coolpower synthetic, & 10% nitro, OS #8 Plug, in a 27% CMPro Giles 202. The motor is 2 years old & the only thing I changed was to Stainless steel bearings, brilliant.
What prop are you running?
How much running has the motor had?
Sounds like it needs more running in. It will get better as it runs in, & more pitch means you don't need to run at full throttle to fly.
And you MUST make sure that you have sufficient cooling air passing through the cowl, does it do all these things with the cowl off? If not, you need more cooling air, usually there is not enough air escaping from the cowl, so the hot air just circulates around & overheats the motor.
You need at least 2 1/2 to 3 times the air outlet, compared to air inlet, around the prop.
Also make sure your tank height is right, tank centreline level with or no more than 3/8" or 10mm below the fuel nipple on the carby.
I ran my 160FX in on a 16x14 APC, that was all I could get, at the time, then I tried a 16x10 in a CMPro Katana, perfect.
In the Giles, I tried a 18x8, needed too many revs to keep it in the air, so tried a 16x10 APC, & now I'm flying it with a 17x10 APC. Much better for that plane, feel free to try different props.
The 160FX loves plenty of pitch, has huge torque, so run a decent prop.
---------------
Everything Allan said, plus make sure that your fuel tank is completely isolated, vibration wise, from your airframe. I'm not familiar with your particular model, but having any part of the fuel tank touching any hard part of the model can shake the fuel tank enough to make foam in the fuel. Most times, you will not see the foam in the fuel lines when the engine is running with the model sitting on the ground. It occurs when the model is in the air, right where you cannot see it do its thing. The best move is to prevent the possibility of fuel foaming by completely isolating the fuel tank.
Also check for the possibility of a crimped vent line. If air doesn't enter the tank freely, the fuel supply will gradually diminish during the flight.
Good luck getting it sorted out.
Ed Cregger
01-07-2007 | 04:18 AM
#5
My Feedback: (29)
RE: Os 1.60fx
You are describing the classic symptoms of using a tank that is too big, mounted too far away, and/or not turning enough rpm for the size or your carburetor. Use the smallest tank that you possibly can and mount it properly in foam. Then make sure the engine is turning over 8500 rpm, 9000 is noticably better for mixture consistency. Muffler pressure will also help. If you must use big props that lugg the engine below 8500, a venturi sleeve or smaller carb may be neccessary. There's always pumps and regulators but they can and often do open the door to tuning problems in other areas.
01-07-2007 | 04:45 AM
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RE: Os 1.60fx
yuh im guessing its a heat problem too, because everything works perfect on the ground though wants it gets hot in the air it stall, im running a pro zinger 18 x 6
on my cowl i hve a huge place where the air can escape But the only entry for the air to go in it on the side where the carb is around 15cm wide but 10cm high. i can open the other side which i will try... see how we go...it is a new motor and has had about 4 flights in total and about 3 tanks full.....so i know it has too run in more but i didnt expect this... the tank is dead set in the line of the carbie and it about 20cm away from the carbie and about 15 from the high end needle
The only thing that is got me is everything is in the stock location and there is heaps of planes out there with the same setup with no problems.....
on my cowl i hve a huge place where the air can escape But the only entry for the air to go in it on the side where the carb is around 15cm wide but 10cm high. i can open the other side which i will try... see how we go...it is a new motor and has had about 4 flights in total and about 3 tanks full.....so i know it has too run in more but i didnt expect this... the tank is dead set in the line of the carbie and it about 20cm away from the carbie and about 15 from the high end needle
The only thing that is got me is everything is in the stock location and there is heaps of planes out there with the same setup with no problems.....
01-07-2007 | 05:31 AM
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From: Warialda NSW, AUSTRALIA
RE: Os 1.60fx
G'day Steve,
An 18x6 is not enough pitch, for the 160FX, it is not designed to run at high revs like a 46AX or a 61FX, Practical max revs is no more than 10,000 RPM, I would bet you would get more than that with an 18x6, Go for more pitch like a 17x10 APC or similar, & you will be surprised at the difference.
An 18x6 is not enough pitch, for the 160FX, it is not designed to run at high revs like a 46AX or a 61FX, Practical max revs is no more than 10,000 RPM, I would bet you would get more than that with an 18x6, Go for more pitch like a 17x10 APC or similar, & you will be surprised at the difference.
01-07-2007 | 10:46 AM
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RE: Os 1.60fx
Without knowing everything on it. Sounds like an over heat from too lean and a big prop. I don't believe in the too large of a tank since all mine are way to large for the planes. (I don't like running out). Get away from the recommended props stuff in the stupid manual and install what works, probably in the 16's.
01-07-2007 | 11:01 PM
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From: Warialda NSW, AUSTRALIA
RE: Os 1.60fx
G'day Cyclic,
He's not running a big prop, an 18x6, is too fine pitch for a 26cc motor, at over 3 horspower, needs much more pitch, believe me I'm flying one, they love pitch, I've flown mine with up to 14" pitch x 16" Dia.
He's not running a big prop, an 18x6, is too fine pitch for a 26cc motor, at over 3 horspower, needs much more pitch, believe me I'm flying one, they love pitch, I've flown mine with up to 14" pitch x 16" Dia.
01-08-2007 | 03:25 AM
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From: Pearl City,
HI
RE: Os 1.60fx
imho, the engine is still breaking-in, and you're probably pushing it a little hard--that's why it's running hot...you should be able to put your finger on the backplate on shutdown...try flying it without the cowl--easier to make necessary small adjustments to mixture and high-speed...sagging and dying in flight with a lot of smoke means it's too rich...i think you'll see improvement by leaning it out a little at a time (with the added castor for protection--just in case)...you might drop back to 10% nitro with about 20% total oil...works for me...hope that helps...ken
