Welcome to Club SAITO !
08-29-2007, 12:59 PM
#8326
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RE: Welcome to Club SAITO !
A couple of months ago - I was concerned that my then new Saito 125 was not developing enough power. It had only a gallon through it then. Now, after one more gallon - I was stunned that I'm getting 9200 rpm on an APC 16x6 - even when running smoky rich! Wow - what a difference an extra gallon makes! I'm currently flying it in a Hangar 9 Twist 60 and the motor pulls the bird vertically forever and only a bit over half throttle. The brute torque available for vertical climbs is so much fun that it sort of spoils you. I have to keep reminding myself when flying my other 2 cycle glows that I'm no longer flying the Saito anymore and not to count on last second instant pullouts. The Saito has never let me down so far but I noticed something that I hope is not indicative of a problem.
When the motor is cold and dry, and when turning over by hand - the air leaks out at the top of the compression stroke, so I feel a bit of resistance on the downstroke. Once lubed or when wet, this never happens of course. Is this normal? I don't seem to feel any leaks on my (non-ringed) 2 strokers. The other I need to do is to start leaning out the low speed mixture. Its still running on factory rich setting but the motor transitions so darn well that I hate to tweak it at all. Hopefully this will make the motor less thirsty.
When the motor is cold and dry, and when turning over by hand - the air leaks out at the top of the compression stroke, so I feel a bit of resistance on the downstroke. Once lubed or when wet, this never happens of course. Is this normal? I don't seem to feel any leaks on my (non-ringed) 2 strokers. The other I need to do is to start leaning out the low speed mixture. Its still running on factory rich setting but the motor transitions so darn well that I hate to tweak it at all. Hopefully this will make the motor less thirsty.
08-29-2007, 01:28 PM
#8327
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RE: Welcome to Club SAITO !
Jim,
I finally got my act together and flew the Tiger-60 with my SAITO 82A.
Of course, the reason for the note is the Turboheader on the engine.
I used a deflector to attempt to keep the exhaust from entering the
canopy. The engine sounds phenomenal thanks to your muffler! As I
mentioned previously, the Turboheader boosted the RPM about 200 RPM.
Krop
I finally got my act together and flew the Tiger-60 with my SAITO 82A.
Of course, the reason for the note is the Turboheader on the engine.
I used a deflector to attempt to keep the exhaust from entering the
canopy. The engine sounds phenomenal thanks to your muffler! As I
mentioned previously, the Turboheader boosted the RPM about 200 RPM.
Krop
08-29-2007, 03:33 PM
#8328
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RE: Welcome to Club SAITO !
ORIGINAL: kryptonite
A couple of months ago - I was concerned that my then new Saito 125 was not developing enough power. It had only a gallon through it then. Now, after one more gallon - I was stunned that I'm getting 9200 rpm on an APC 16x6 - even when running smoky rich! Wow - what a difference an extra gallon makes! I'm currently flying it in a Hangar 9 Twist 60 and the motor pulls the bird vertically forever and only a bit over half throttle. The brute torque available for vertical climbs is so much fun that it sort of spoils you. I have to keep reminding myself when flying my other 2 cycle glows that I'm no longer flying the Saito anymore and not to count on last second instant pullouts. The Saito has never let me down so far but I noticed something that I hope is not indicative of a problem.
When the motor is cold and dry, and when turning over by hand - the air leaks out at the top of the compression stroke, so I feel a bit of resistance on the downstroke. Once lubed or when wet, this never happens of course. Is this normal? I don't seem to feel any leaks on my (non-ringed) 2 strokers. The other I need to do is to start leaning out the low speed mixture. Its still running on factory rich setting but the motor transitions so darn well that I hate to tweak it at all. Hopefully this will make the motor less thirsty.
A couple of months ago - I was concerned that my then new Saito 125 was not developing enough power. It had only a gallon through it then. Now, after one more gallon - I was stunned that I'm getting 9200 rpm on an APC 16x6 - even when running smoky rich! Wow - what a difference an extra gallon makes! I'm currently flying it in a Hangar 9 Twist 60 and the motor pulls the bird vertically forever and only a bit over half throttle. The brute torque available for vertical climbs is so much fun that it sort of spoils you. I have to keep reminding myself when flying my other 2 cycle glows that I'm no longer flying the Saito anymore and not to count on last second instant pullouts. The Saito has never let me down so far but I noticed something that I hope is not indicative of a problem.
When the motor is cold and dry, and when turning over by hand - the air leaks out at the top of the compression stroke, so I feel a bit of resistance on the downstroke. Once lubed or when wet, this never happens of course. Is this normal? I don't seem to feel any leaks on my (non-ringed) 2 strokers. The other I need to do is to start leaning out the low speed mixture. Its still running on factory rich setting but the motor transitions so darn well that I hate to tweak it at all. Hopefully this will make the motor less thirsty.
08-29-2007, 06:41 PM
#8329
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RE: Welcome to Club SAITO !
My 1.00 does basically the same thing. If you hold it at TDC, you can hear a bit of air leaking. If it doesn't do it when wet I would not worry about it. I think most Saitos have leakage at the valves, as every single one I've had except my .91 has done this (one 1.00 leaks a little, two .82s leaked at the valves, one of them excessively).
What kind of fuel are you using?
What kind of fuel are you using?
ORIGINAL: kryptonite
A couple of months ago - I was concerned that my then new Saito 125 was not developing enough power. It had only a gallon through it then. Now, after one more gallon - I was stunned that I'm getting 9200 rpm on an APC 16x6 - even when running smoky rich! Wow - what a difference an extra gallon makes! I'm currently flying it in a Hangar 9 Twist 60 and the motor pulls the bird vertically forever and only a bit over half throttle. The brute torque available for vertical climbs is so much fun that it sort of spoils you. I have to keep reminding myself when flying my other 2 cycle glows that I'm no longer flying the Saito anymore and not to count on last second instant pullouts. The Saito has never let me down so far but I noticed something that I hope is not indicative of a problem.
When the motor is cold and dry, and when turning over by hand - the air leaks out at the top of the compression stroke, so I feel a bit of resistance on the downstroke. Once lubed or when wet, this never happens of course. Is this normal? I don't seem to feel any leaks on my (non-ringed) 2 strokers. The other I need to do is to start leaning out the low speed mixture. Its still running on factory rich setting but the motor transitions so darn well that I hate to tweak it at all. Hopefully this will make the motor less thirsty.
A couple of months ago - I was concerned that my then new Saito 125 was not developing enough power. It had only a gallon through it then. Now, after one more gallon - I was stunned that I'm getting 9200 rpm on an APC 16x6 - even when running smoky rich! Wow - what a difference an extra gallon makes! I'm currently flying it in a Hangar 9 Twist 60 and the motor pulls the bird vertically forever and only a bit over half throttle. The brute torque available for vertical climbs is so much fun that it sort of spoils you. I have to keep reminding myself when flying my other 2 cycle glows that I'm no longer flying the Saito anymore and not to count on last second instant pullouts. The Saito has never let me down so far but I noticed something that I hope is not indicative of a problem.
When the motor is cold and dry, and when turning over by hand - the air leaks out at the top of the compression stroke, so I feel a bit of resistance on the downstroke. Once lubed or when wet, this never happens of course. Is this normal? I don't seem to feel any leaks on my (non-ringed) 2 strokers. The other I need to do is to start leaning out the low speed mixture. Its still running on factory rich setting but the motor transitions so darn well that I hate to tweak it at all. Hopefully this will make the motor less thirsty.
08-29-2007, 09:54 PM
#8331
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RE: Welcome to Club SAITO !
I have a problem. My cowling is 1/4" too long on my just completed GP J-3 Cub. To alter the cowling would be horrific.
Does anyone make a spacer to move the prop out 1/4"? Aluminum or plastic?
Please tell me it can be done. I don't want to have to re-do the cowling or spacer the enginer out.
Thanks
Does anyone make a spacer to move the prop out 1/4"? Aluminum or plastic?
Please tell me it can be done. I don't want to have to re-do the cowling or spacer the enginer out.
Thanks
08-29-2007, 11:23 PM
#8332
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RE: Welcome to Club SAITO !
Putting the prop on the threads is not a good idea.IMHO>any chance to space out the motor mount. New motor mount holes are another idea. Cutting your plane no way go for the spacer before cutting the plane
08-30-2007, 08:47 AM
#8335
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RE: Welcome to Club SAITO !
ORIGINAL: RVM
My 1.00 does basically the same thing. If you hold it at TDC, you can hear a bit of air leaking. If it doesn't do it when wet I would not worry about it. I think most Saitos have leakage at the valves, as every single one I've had except my .91 has done this (one 1.00 leaks a little, two .82s leaked at the valves, one of them excessively).
What kind of fuel are you using?
My 1.00 does basically the same thing. If you hold it at TDC, you can hear a bit of air leaking. If it doesn't do it when wet I would not worry about it. I think most Saitos have leakage at the valves, as every single one I've had except my .91 has done this (one 1.00 leaks a little, two .82s leaked at the valves, one of them excessively).
What kind of fuel are you using?
I'm using CoolPower MV for 4 strokes. I think its 15% nitro and 18% synthetic. I know there is no castor in this mix, so I'm careful to make sure it runs on the rich side and I measure the temps on landing. After each run, I squirt a lot of Hobbico after-run into the crankcase and cant the motor so that the oil runs into the bearings. I've also just adjusted the valves using a feeler gauge - it was set a bit tight at the factory. Gotta try the low end mixture tweaking this weekend.
08-30-2007, 08:58 AM
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RE: Welcome to Club SAITO !
Do you guys hand start your plane? I can never get it to turn over unless I use an electric starter, it backfires and kicks the chicken stick out of my hand!
08-30-2007, 10:31 AM
#8338
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RE: Welcome to Club SAITO !
ORIGINAL: freeonthree
Moving the engine forward the thickness of plywood, will change the CG, but not enough to where you'll notice it in the air.
Moving the engine forward the thickness of plywood, will change the CG, but not enough to where you'll notice it in the air.
Thanks in advance.
08-30-2007, 11:18 AM
#8339
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RE: Welcome to Club SAITO !
[:@]I don't have a solution to the prop/cowl problem. I'm interested in what, if any, onboard glow system you are going to use with your Saito 170 Tripple?
08-30-2007, 01:17 PM
#8340
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RE: Welcome to Club SAITO !
Do you guys hand start your plane? I can never get it to turn over unless I use an electric starter, it backfires and kicks the chicken stick out of my hand!
Well I hand start mine but this was not the case till I learned how and got them set up right.... Sounds like they are to lean on the low needle first so you might adjust that.
My method is to prime with out glow till wet then attach glow and make sure my radio is set to low stick then I flip backwards and they usually fire right up !!!!!
08-30-2007, 02:21 PM
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RE: Welcome to Club SAITO !
ORIGINAL: conchohoncho
[:@]I don't have a solution to the prop/cowl problem. I'm interested in what, if any, onboard glow system you are going to use with your Saito 170 Tripple?
[:@]I don't have a solution to the prop/cowl problem. I'm interested in what, if any, onboard glow system you are going to use with your Saito 170 Tripple?
08-30-2007, 04:22 PM
#8342
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RE: Welcome to Club SAITO !
I hand start mine unless I've got a regulator hooked up. Then I use a starter. There is usually a ton of ARO in my engines when I go to start them so I don't worry about excessive wear from the starter spinning it over.
Are you backflipping to start or trying to turn the prop through compression to start?
Are you backflipping to start or trying to turn the prop through compression to start?
ORIGINAL: edberg
Do you guys hand start your plane? I can never get it to turn over unless I use an electric starter, it backfires and kicks the chicken stick out of my hand!
Do you guys hand start your plane? I can never get it to turn over unless I use an electric starter, it backfires and kicks the chicken stick out of my hand!
08-30-2007, 04:41 PM
#8343
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RE: Welcome to Club SAITO !
the instructions should have a dimension to set the distance from the drive washer (back of prop) to the back surface of the motor mount (or distance to the firewall). that's where the engine has to be posititoned to fit the cowl. then adjust the equipment to set the cg.
jon
jon
08-30-2007, 05:38 PM
#8344
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RE: Welcome to Club SAITO !
do you guys see a lot of smoke coming out while flying? i noticed a lot more coming out while flying last night. the other guys (mostly 2 strokers) seemed cleaner in the air. no smoke trails. although it kinda looks cool i'm concerned it might be a bit rich. i've adjusted the high-speed for slightly lower than max. rpm.
is there something i'm missing here with the high speed needle?
oh, this is a 100 inverted mounted.
thanks
is there something i'm missing here with the high speed needle?
oh, this is a 100 inverted mounted.
thanks
08-30-2007, 06:34 PM
#8346
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RE: Welcome to Club SAITO !
jb86:
I set the engine from the drive washer to the firewall just as the instructions said. I had to shim it out 1/2" in order to make it work. It is a J-3 GP and the engine
is a Saito 56. From memory (and that can be bad) I think it was 5 1/8 or 5 1/4 inches. I know it measured just what was called for. The cowl is pressed tightly onto the
nose, so I can't push it any further back.
I have decided to find or use a 1/4" pc. of laminated plywood with some 80 - 120 grit sandpaper glued to each side for holding power. I think the wt. of
the shim will be negligable.
Thanks for all responses. This is a great forum.
I set the engine from the drive washer to the firewall just as the instructions said. I had to shim it out 1/2" in order to make it work. It is a J-3 GP and the engine
is a Saito 56. From memory (and that can be bad) I think it was 5 1/8 or 5 1/4 inches. I know it measured just what was called for. The cowl is pressed tightly onto the
nose, so I can't push it any further back.
I have decided to find or use a 1/4" pc. of laminated plywood with some 80 - 120 grit sandpaper glued to each side for holding power. I think the wt. of
the shim will be negligable.
Thanks for all responses. This is a great forum.
08-30-2007, 08:01 PM
#8347
RE: Welcome to Club SAITO !
Some fuels smoke more than others, and old fuel tends to smoke more too because the lack of nitro and methanol which eveporates over time, leaving you with a higher oil content per volume. Just something to keep in mind.
08-30-2007, 08:05 PM
#8348
RE: Welcome to Club SAITO !
I've wondered before it relative humidity has any bearing on the amount of smoke. I've noticed my engines smoke more on some days than others.
08-30-2007, 08:23 PM
#8349
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RE: Welcome to Club SAITO !
Dunno, but I bet warmer days smoke more than cooler days.
ORIGINAL: TimC
I've wondered before it relative humidity has any bearing on the amount of smoke. I've noticed my engines smoke more on some days than others.
I've wondered before it relative humidity has any bearing on the amount of smoke. I've noticed my engines smoke more on some days than others.
08-30-2007, 08:24 PM
#8350
RE: Welcome to Club SAITO !
Humidity has alot to do with tuning, just as altitude and temperature does, so yes, you will notice days where your planes will smoke more or less than others. As long as they run great, I never retune. I may grab a click or two on the HSN occassionally if anything, but thats it. I lost a Cessna once because I leaned my HSN too much, and on taking off into the wind, it went lean, died and fell. Had there not been some dude with a 2 stroke 10 feet away at full thoottle, I would have heard it go lean and pulled the throttle back a bit. Oh well...
Yep, I only get nervous when I don't see enough smoke anymore...
Yep, I only get nervous when I don't see enough smoke anymore...