Welcome to Club SAITO !
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RE: Welcome to Club SAITO !
Thanks all, the corsair looks great with that prop much more like I was looking for.Went to the local hobby shop and got some props today,14x7-15x6-16x6. Yanked the motor and mounted it to the stand with a scale to measure thrust vs rpm.I know 16x6 is pushing the envelope but what the heck! I'll compare them to the 2 blade 14x8 zinger and see what I get.Once agian thanks for the input.
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RE: Welcome to Club SAITO !
With a Corsair ultimate thrust may not be the ideal.
You will have to reach a compromise between thrust and speed.
The 14-8 may be your prop?
You will have to reach a compromise between thrust and speed.
The 14-8 may be your prop?
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RE: Welcome to Club SAITO !
Thanks Ken. I ordered the bearings last night, and not from horizon. Thanks for the info. Now I am going to dig back on this thread for some good instructions on changing them.
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RE: Welcome to Club SAITO !
ORIGINAL: retransit
Hey Ed, how about diesels? Low RPM, low horsepower, high torque.
Bob
ORIGINAL: Ed Cregger
If they produce more torque at the same rpm, there isn't any way that it cannot produce more horsepower. This applies to any engine type, not just four-strokes. I knew I shouldn't have left that qualifier (same rpm) out, but I forgot it before posting.
Ed Cregger
ORIGINAL: Michaelh
Does not mean they produce more HP just because they produce more toque.
Does not mean they produce more HP just because they produce more toque.
If they produce more torque at the same rpm, there isn't any way that it cannot produce more horsepower. This applies to any engine type, not just four-strokes. I knew I shouldn't have left that qualifier (same rpm) out, but I forgot it before posting.
Ed Cregger
Bob
I don't want to drag this thread too far off topic. I'll just say that the formula for horsepower is torque x rpm. You can see that at low rpm, it takes a LOT of torque to come up with a decent HP number, but it can be done. Torque is what performs the work, the rest is mathematic fancy footwork. <G>
Ed Cregger
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RE: Welcome to Club SAITO !
Are there any 'how to' videos out there on re-gapping? I finally have my 125 ready for a maiden but it seemed to be running a bit rough. A guy at my field showed me how to do it last year and I can't remember for the life of me.
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RE: Welcome to Club SAITO !
No, I would have had to modify too much just to get proper spacing of the back plate from the cowl. If it were a full build kit I may have put the effort in... but not for an arf. But don't for a second think I didn't consider it. As it is it just barely fits in the Toni as far as depth is concerned.
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Haha Thought you might have at least thought about it
Here's how I do it... ( tappet covers are off of course )
Firstly get your engine at TDC , and if you slightly wiggle the crankshft back and forth the tappet rockers will both rock up and down.
Side your feeler gauge under the rocker and above the spring bit ( excuse my terminology ). It shouldn't be tight to push the feeler gauge thru or sloppy. you need to feel the gauge slightly rubbing.
If too tight or loose you'll need to adjust the gap. place your little spanner on the lock nut and insert the allen key ( you call it hex nut?? ) wrench on the little bolt head. Without the allen key turning loosen off the lock nut.
Now tighten up or loosen the allen key ( tiny of a turn ) bit to get your feeler gauge just rubbing. Sometimes I put a little bit of pressure on the bolt head to make it easier to gap the other end better. This is the hard part... you now need lockup the locking nut without moving the allen key headed bolt. Takes a bit of practice but not as hard as it sounds. Recheck the gap once your done, and remember to do this proceedure witha cold engine. And you done
Hope that helps you,
Paul
Here's how I do it... ( tappet covers are off of course )
Firstly get your engine at TDC , and if you slightly wiggle the crankshft back and forth the tappet rockers will both rock up and down.
Side your feeler gauge under the rocker and above the spring bit ( excuse my terminology ). It shouldn't be tight to push the feeler gauge thru or sloppy. you need to feel the gauge slightly rubbing.
If too tight or loose you'll need to adjust the gap. place your little spanner on the lock nut and insert the allen key ( you call it hex nut?? ) wrench on the little bolt head. Without the allen key turning loosen off the lock nut.
Now tighten up or loosen the allen key ( tiny of a turn ) bit to get your feeler gauge just rubbing. Sometimes I put a little bit of pressure on the bolt head to make it easier to gap the other end better. This is the hard part... you now need lockup the locking nut without moving the allen key headed bolt. Takes a bit of practice but not as hard as it sounds. Recheck the gap once your done, and remember to do this proceedure witha cold engine. And you done
Hope that helps you,
Paul
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RE: Welcome to Club SAITO !
Got it, thanks for the help. I knew I had to loosen the hex heads(bolts) I just wasn't sure how or where to adjust with the allen key. Should run better now. I was getting 8200k with a 14X10apc, where as before I was getting somewhere in between 87-8900 depending on the humidity and temp. Starting to cool off at night here dropping down to 8degs at night. Motors run great at that temp, no overheating. Thanks again for the help.
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RE: Welcome to Club SAITO !
The 3 blade prop is for a stuka not a very quick plane to begin with, definitley not a fighter. With the 2blade Zinger 14x8 it seems to reach a set speed at2/3 throttle or less and little is gained by giving it more.I think the wing design and size is causing this,70 in. on a .60 size plane.If I can match the thrust of the 2 blade prop at a lower rpm and gain a little more thrust at takeoff up to the rpm limit would this work?
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RE: Welcome to Club SAITO !
ORIGINAL: Ed Cregger
-
Not to be argumentative (who me?), but my ST G2300 handles the 18x8 with ease and its a 1.40 two-stroke, as everyone knows.
I'll have to mount up my Saito 1.80 and run comparisons between the 18x8 and other prop sizes that have been mentioned here. Of course, it depends upon the airplane that one is flying too, as to whether a propeller is suitable or not.
Ed Cregger
ORIGINAL: w8ye
The 17X8 and 18 X 6 are the correct props
The 17X8 and 18 X 6 are the correct props
-
Not to be argumentative (who me?), but my ST G2300 handles the 18x8 with ease and its a 1.40 two-stroke, as everyone knows.
I'll have to mount up my Saito 1.80 and run comparisons between the 18x8 and other prop sizes that have been mentioned here. Of course, it depends upon the airplane that one is flying too, as to whether a propeller is suitable or not.
Ed Cregger
Ron
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RE: Welcome to Club SAITO !
Ed,
Horsepower is work done over time. The formula for one horsepower is 33,000 lb.-ft. divided by one minute, not torque X RPM. If what you said were true, my Ponticac at 4800 rpm (as measured on a chassis dyno) and 285.2 lb-ft of torque would be giving up 1,368,960 h.p. instead of the 260.6 h.p. it showed.
Bob
Horsepower is work done over time. The formula for one horsepower is 33,000 lb.-ft. divided by one minute, not torque X RPM. If what you said were true, my Ponticac at 4800 rpm (as measured on a chassis dyno) and 285.2 lb-ft of torque would be giving up 1,368,960 h.p. instead of the 260.6 h.p. it showed.
Bob
ORIGINAL: Ed Cregger
I don't want to drag this thread too far off topic. I'll just say that the formula for horsepower is torque x rpm. You can see that at low rpm, it takes a LOT of torque to come up with a decent HP number, but it can be done. Torque is what performs the work, the rest is mathematic fancy footwork. <G>
Ed Cregger
ORIGINAL: retransit
Hey Ed, how about diesels? Low RPM, low horsepower, high torque.
Bob
ORIGINAL: Ed Cregger
If they produce more torque at the same rpm, there isn't any way that it cannot produce more horsepower. This applies to any engine type, not just four-strokes. I knew I shouldn't have left that qualifier (same rpm) out, but I forgot it before posting.
Ed Cregger
ORIGINAL: Michaelh
Does not mean they produce more HP just because they produce more toque.
Does not mean they produce more HP just because they produce more toque.
If they produce more torque at the same rpm, there isn't any way that it cannot produce more horsepower. This applies to any engine type, not just four-strokes. I knew I shouldn't have left that qualifier (same rpm) out, but I forgot it before posting.
Ed Cregger
Bob
I don't want to drag this thread too far off topic. I'll just say that the formula for horsepower is torque x rpm. You can see that at low rpm, it takes a LOT of torque to come up with a decent HP number, but it can be done. Torque is what performs the work, the rest is mathematic fancy footwork. <G>
Ed Cregger
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RE: Welcome to Club SAITO !
Gegay Ron,
Without flogging the old horse ( flogging the horse O.F. ! ) your right about comparing apples and oranges regarding same props on a 2 stroke 1.40 and an awesome Saito 180...
I have a ST motor that'll swing the same size prop that my 180 does at same revs, BUT the Saito weighs much less and drinks ( well now it does ) heaps less fuel. The 4 stroke in this also idles lower and has way better throttle responce and the exhaust note is delightful. No contest!
Gimme a 4 stroke anytime.... but this choice at the end of the day is one of personal perferrence I guess??
Weekend is here, Happy flying Guys !!!
Paul
retransit.... Only 260hp?? wanna hope that wasn't at the flywheel
Without flogging the old horse ( flogging the horse O.F. ! ) your right about comparing apples and oranges regarding same props on a 2 stroke 1.40 and an awesome Saito 180...
I have a ST motor that'll swing the same size prop that my 180 does at same revs, BUT the Saito weighs much less and drinks ( well now it does ) heaps less fuel. The 4 stroke in this also idles lower and has way better throttle responce and the exhaust note is delightful. No contest!
Gimme a 4 stroke anytime.... but this choice at the end of the day is one of personal perferrence I guess??
Weekend is here, Happy flying Guys !!!
Paul
retransit.... Only 260hp?? wanna hope that wasn't at the flywheel
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RE: Welcome to Club SAITO !
That was at the rear wheels beaver180. Remember I said "chassis dyno". You can add 12% to 15% for flywheel h.p. It's an internally stock '96 TA with BBK headers added after the dyno pull. Max h.p. was 297.1 for the pull quoted. Stock rating is 305 h.p. at the flywheel.
Bob
Bob
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RE: Welcome to Club SAITO !
oof, I've lost my little valve adjustment wrench.
I see quite a few different tool sets on Horizon for Saito engines. Mine is out of stock.
Are all of these valve adjustment lock-down nuts the same size?
I see quite a few different tool sets on Horizon for Saito engines. Mine is out of stock.
Are all of these valve adjustment lock-down nuts the same size?
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RE: Welcome to Club SAITO !
I can tell you the 1.80's are bigger then the ..82's wrenches. I have 3 sets of for the .82 as this size plane seems my favorite. Let me know if you need a set.
Will work for the .56-1.15
Mike
Will work for the .56-1.15
Mike
RE: Welcome to Club SAITO !
Hello mike,my engine was bought second hand and the 4mm spanner was missing.Auto shops here only sell sets down to 1/4 inch or 6mm.Went to an electrical shop and bought a tiny set for working on computers and such.Good luck.
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RE: Welcome to Club SAITO !
Thanks, guys!
But I found an old WR post on this very topic and went to sears and bought the ignition wrench set.
The smallest is 4mm and works great!
But I found an old WR post on this very topic and went to sears and bought the ignition wrench set.
The smallest is 4mm and works great!
RE: Welcome to Club SAITO !
ORIGINAL: Old Fart
You're still talking about ehgines??
ORIGINAL: AJsToyz
I actually like them upside down or side mount for ease of hand starting. Otherwise they will run however you mount them.
Andy
I actually like them upside down or side mount for ease of hand starting. Otherwise they will run however you mount them.
Andy
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RE: Welcome to Club SAITO !
I am going to change the bearings in my Saito 125. I have a gear puller for the hub removal. Is there any hints or tricks I should know about to make this a successful task? This will be my first attempt and I am a little nervous.