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Old 12-14-2017, 03:41 PM
  #35226  
jkr_1100
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Originally Posted by jkr_1100
create a chart of all engines, there weight, and power and then map them out in a chart

you will find the Saito 1.25 has the highest power to weight ratio of any engine.

ahh statistics

And it flys the hell out of a Goldberg Tiger 2
Old 12-14-2017, 04:13 PM
  #35227  
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Flies my Top Flight P-51 very well...when it runs.
Old 12-14-2017, 06:04 PM
  #35228  
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Originally Posted by jkr_1100
create a chart of all engines, there weight, and power and then map them out in a chart

you will find the Saito 1.25 has the highest power to weight ratio of any engine.

ahh statistics
According to SAITO'S OWN SPECIFICATIONS:

FA-115 2.1 HP 586g = 3.58 HP per Kg
FA-125 2.2 HP 620g = 3,55 HP per Kg
FA-100 1.8 HP 550g = 3.27 HP per Kg

Seems that the FA-115 has a slightly better power to weight ratio than the FA-125 and significantly better than the FA-100..

Comparing bore/stroke:
FA-115 31.7mm/24mm is 32% over square
FA-125 31.7mm/26mm is 22% over square
FA-100 29.0mm/26mm is 12% over square.

We are not pulling stumps here, we are turning propellers at near peak HP static.

Last edited by SrTelemaster150; 12-14-2017 at 06:17 PM.
Old 12-14-2017, 06:21 PM
  #35229  
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OF buddy, I like you and want you to be safe over there, so I just want to warn you, stay away from the beaches over there, be safe (see my link below)

your concerned buddy, Jim

Scientists spot the ruby sea dragon for the first time ever
Old 12-14-2017, 06:29 PM
  #35230  
the Wasp
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FA-115 2.1 HP 586g = 3.58 HP per Kg
FA-125 2.2 HP 620g = 3,55 HP per Kg
FA-100 1.8 HP 520g = 3.46 HP per Kg
but those numbers are at full throttle/peak power, what about at 1/2 (4500) throttle or 1/4 (3000) throttle or 3/4 (6500) throttle ??

Jim

Last edited by the Wasp; 12-14-2017 at 06:31 PM.
Old 12-14-2017, 06:57 PM
  #35231  
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I did take time to take a picture, it some serious compression, I think Clarence Lee said the compression ratio on the 1.30 is 12.98. I'll go look. It'll be a day or two before I can run it, with 7 kids it's a busy time
hey, you had a Lock Nut for the Prop Nut LOL LOL,,

Dave, you don't know me well, that is why I left the Tappet Lash for you to adjust, but I was adjusting a Solid Lifter Cam back in 1978 on my first car (68 Nova) it had a 350 with the 67 to 69 302 Z28 ZDZ Cam.. yes I had the urge, but I left it to you

BTW I if you can't use the props and spinner, sell them or give them away,, or put them on the wall

Jim

Last edited by the Wasp; 12-14-2017 at 07:00 PM. Reason: there was a dot I had to remove, if you want it back just tell me, I will then put it back, but I wont like it
Old 12-14-2017, 07:49 PM
  #35232  
SrTelemaster150
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Originally Posted by jkr_1100
create a chart of all engines, there weight, and power and then map them out in a chart

you will find the Saito 1.25 has the highest power to weight ratio of any engine.

ahh statistics
Originally Posted by SrTelemaster150
According to SAITO'S OWN SPECIFICATIONS:

FA-115 2.1 HP 586g = 3.58 HP per Kg
FA-125 2.2 HP 620g = 3,55 HP per Kg
FA-100 1.8 HP 550g = 3.27 HP per Kg

Seems that the FA-115 has a slightly better power to weight ratio than the FA-125 and significantly better than the FA-100..

Comparing bore/stroke:
FA-115 31.7mm/24mm is 32% over square
FA-125 31.7mm/26mm is 22% over square
FA-100 29.0mm/26mm is 12% over square.

We are not pulling stumps here, we are turning propellers at near peak HP static.
Originally Posted by the Wasp
but those numbers are at full throttle/peak power, what about at 1/2 (4500) throttle or 1/4 (3000) throttle or 3/4 (6500) throttle ??

Jim
The original post was all about how the FA-125 had the highest power to weight ratio. Which, if one is to believe Saito's own specifications, it does not.

But if you must insert added criteria to defend the FA-125, how about the added fuel consumption of the FA-125 over the FA-115 which will necessitate added fuel load in the aircraft for a given flight time/range thus diminishing the power to weight ratio even further.

Last edited by SrTelemaster150; 12-14-2017 at 07:58 PM.
Old 12-14-2017, 09:07 PM
  #35233  
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you are make me to look more at the over priced 115,

fuel consumption

rather it's true or not I don't know> but according to my link the 125 uses less fuel than their 120, 100 and 91,,

Fuel_Tank

Jim

Last edited by the Wasp; 12-14-2017 at 10:02 PM.
Old 12-15-2017, 02:27 AM
  #35234  
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Originally Posted by Hobbsy
I made this little short intake for my 1.50, placing the carb about 1.25" from the intake valve. It did nothing, Dan now owns it.

Don't make me cry Pete, it's 36-f here and about to snow.
I'll try not to,but you were laughing six months ago in sunshine over there riding your harley.I hear if your in california it's still summer.

Same here jim and thanks for the link,i'll be careful to stay away from our west aussie beaches from now on,that picture looks like an ex missus.In fact a lot of people here are doing that now as we have so many white pointers these last few years coming in to shallow water and hoovering up wayward swimmers and surfers.Pretty soon you won't need a boat to get over to rottnest island for a beer,you'll be able to walk across on shark backs.

ps north of here is a place called shark bay and i'll never forget a new australian who was interested in fishing asking why it was called that,the guy next to me said because it's not full of dolphins.

pps i never worry about how much fuel any saito uses,they sound awesome and that's enough,they have plenty of power too.Think about it this way.If you go out to have a good time after work would you be a scrooge and buy a cheap hamburger rather than having a nice steak and a beer?...you don't fly that often during the week either so why hold back when you get the chance to do that on a perfect sunday.

ppps barry you still out thrashing the honda s2000?
Old 12-15-2017, 03:41 AM
  #35235  
SrTelemaster150
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Originally Posted by the Wasp
you are make me to look more at the over priced 115,

fuel consumption

rather it's true or not I don't know> but according to my link the 125 uses less fuel than their 120, 100 and 91,,

Fuel_Tank

Jim
Yeah riiiiight.
Old 12-15-2017, 04:35 AM
  #35236  
Hobbsy
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I got 10000 rpm w/ my "stock" Saito 100 on APC 15x6 prop and 30% nitro fuel. With 15% nitro fuel, I'd get 9600. (quote by Sean Y. Chen
The post right above this one was an APC 15x6-W at 9,750 doesn't say what fuel. These are typical Saito 100 numbers. Actually 1.04.
Old 12-15-2017, 05:39 AM
  #35237  
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Originally Posted by Hobbsy
I got 10000 rpm w/ my "stock" Saito 100 on APC 15x6 prop and 30% nitro fuel. With 15% nitro fuel, I'd get 9600. (quote by Sean Y. Chen
The post right above this one was an APC 15x6-W at 9,750 doesn't say what fuel. These are typical Saito 100 numbers. Actually 1.04.
So you are pulling right at 1.8-1.9 HP. Right in the ballpark for the FA-100. However, without a "control" such as a pull with another engine of know power output done at the same time, there can be some significant variance in output due to atmospheric conditions and/or altitude.. I've seen as much as 300 RPM variance from different days with the same (Saito) engine.

I've seen as much as 50 HP variance in my 5.7 3rd Gen Hemi at different times on the same day at the track. I've seen as much as 100 HP difference at tracks with differing altitude and atmospheric conditions. That's a 20% variance.

Since I have a control engine for comparison, I can make a valid determination of the relative power output when I test my FA-115.

Now that hunting season is over and gun projects are winding down I have several engine tests to do, including the various combinations on a Saito FA-171 (180 top end on stock 150 crank) including 2 different rod lengths (FA-150 & FA-180) and 2 different piston combinations (FA-180 & FG-57) that will cover a CR range of about 7:1 to 15:1 if I can get sufficient piston/valve clearance for the later

BTW; An FA-180 isn't 1.8 cu in, it's 1.77 cu in so the change from the 180 to 150 crank does't affect displacement significantly when both have a 180 top end in place. (.07 cu in)

Then there is the FA-115 on both GI and CDI and the FA-220 (which arrived yesterday) with GI and CDI in addition to CDI high compression.

But 1st, it has to get above freezing due to the fact that I can't afford to heat my shop when it's sub zero. It was -5F this morning INSIDE the barn and I doubt that the garage was much warmer..

Last edited by SrTelemaster150; 12-15-2017 at 05:50 AM.
Old 12-15-2017, 05:42 AM
  #35238  
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-5F?! Don't feel like you need to share that cold! I have been complaining the highs have been in the 50s around here. I'm such a wimp when it comes to cold weather!
Old 12-15-2017, 05:50 AM
  #35239  
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Not my numbers, those were by a contributor named Sean Y. Chen in Mich.

PS, when growing up on our dairy farm in western Pa. -5 was just right for hauling manure, the ground was frozen solid.

Last edited by Hobbsy; 12-15-2017 at 05:52 AM. Reason: Add content.
Old 12-15-2017, 05:52 AM
  #35240  
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Originally Posted by FlyerInOKC
-5F?! Don't feel like you need to share that cold! I have been complaining the highs have been in the 50s around here. I'm such a wimp when it comes to cold weather!
I wish we had had these temperature during deer season. They really get out and move during mid day when the sun is shining (it usually does when it's this cold)
Old 12-15-2017, 05:52 AM
  #35241  
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Originally Posted by Hobbsy
Not my numbers, those were by a contributor named Sean Y. Chen in Mich.

PS, when growing up on our dairy farm in western Pa. -5 was just right for hauling manure, the ground was frozen solid.
Where was that farm exactly?
Old 12-15-2017, 06:12 AM
  #35242  
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Beaver County Pa. about 3 miles from Ohio and 1 mile from W.Va. Here is the farm house in about 1918, when it was being built, Native Americans still traveled past it on the hill top just out of site in the background. My Dad filling the 20' x 60' silo which held 500 tons of corn silage. Trellborg flotation tires like on the manure spreader.
Our manure spreader held 1,400 gallons of liquid manure, it weighed about 1,600 lbs, the manure weighed 11,676. Even with those big fat tires you did not dare go near a field when it was wet, Our barn was 50' x 100' and had 94 stalls with a 12 cow Herringbone milking parlor on the south end.
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Last edited by Hobbsy; 12-15-2017 at 06:14 AM. Reason: Spelling
Old 12-15-2017, 06:25 AM
  #35243  
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Sounds like a good size working farm. My No. 2 son runs a grain elevator in Kansas, agriculture isn't for the faint of heart.
Old 12-15-2017, 06:37 AM
  #35244  
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We pasteurized and homogenized and bottled our milk and had three milk routes, two in W.Va. and one in Pa. It was a great way to grow up. Lots of 10,000 lb and up toys.I overhauled my first engine at 14, A Farmall Super A. I put new M&W sleeves and pistons and bearings in it. Walters Farm Service, a Case Dealer pressed the old sleeves out and the new ones in. I did all the rest.
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Old 12-15-2017, 07:30 AM
  #35245  
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I made a new degree wheel yesterday, the other two were to bulky and one was too flimsy. I used Super Phatic, it soaks outward everywhere, to glue the picture to a piece of scrap .25" luan ply. Then rough cut the image on my little band saw, drilled an 8mm hole dead center. Then inserted an 8mm bolt with a short non threaded shoulder with a Saito prop washer on each side of the wood. I then put my drill,press in it's fastest belt position and sanded it perfectly round. Easy Peazy.
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Old 12-15-2017, 09:33 AM
  #35246  
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Nice looking timing wheel!

I remember my old 1959 Triumph TR-3A had a engine with a wet sleeve desihn. It was nice because you could just about rebuild the engine indefinitely. Starndard-Triumph designed the car to use as many spare parts as they had on hand. One of them was the Ferguson Tractor engine leftover from when Standard built tractors. They shorten the stroke and made a few more tweaks then mated to a 4 speed manual transmission with an available optional .8 to 1 overdrive sandwiched in between. My car had the overdrive it was nice. Back when the speed limit was 55 you had to get up to 60 to kick the OD in and then drop to a high idle to run at 55. If only they had used an independent rear axle like the TR-4A had instead of the solid axle it would have been a lot hard to roll. Their was an old racer who said the TR-3 could be rolled pulling into your garage.
Old 12-15-2017, 09:44 AM
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I guess that was before Ferguson's were powered by Perkins engines. My brother in western Pa. has a Ferguson 35 powered by a three cylinder Perkins. Three cylinder and five cylinder engines are so smooth.

Last edited by Hobbsy; 12-15-2017 at 09:46 AM.
Old 12-15-2017, 10:12 AM
  #35248  
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Originally Posted by Hobbsy
I guess that was before Ferguson's were powered by Perkins engines. My brother in western Pa. has a Ferguson 35 powered by a three cylinder Perkins. Three cylinder and five cylinder engines are so smooth.
The engine was the Ferguson TEA20 engine used from 1947-1956. They had a lot of different engines available during this period depending on what fuel you wanted to use. They had gasoline, TVO (Tractor Vaporizing Oil, also know as petrol-paraffin or power kerosene.), Diesel, and lamp oil. Between WWII and the Suez War with Egypt gas supplies were spotty at best. I believe they started using the Perkins 3 cylinder diesels around 1957. The roaster engine was first developed for the Standard Vangaurd, which early models looked a bit like a Hudson only uglier.

Last edited by FlyerInOKC; 12-15-2017 at 10:15 AM.
Old 12-15-2017, 10:55 AM
  #35249  
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Originally Posted by Hobbsy
Three cylinder and five cylinder engines are so smooth.
Primarily due to the fact that no 2 pistons change direction at TDC or BDC at the same time.

That is also why Harley Davidson "V" twins don't have the vibrating "buzz" of parallel twins. The new generation of British vertical twins have offset crank throws for the same reason.

Last edited by SrTelemaster150; 12-15-2017 at 10:57 AM.
Old 12-15-2017, 11:14 AM
  #35250  
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Dan, why do they call them 270 degree cranks instead of calling them 90 degree cranks, Thanks. My sons Yamaha has a cross plane crank with the throws all four at 90 degree intervals. Interesting. I guess mfrs. like to use the biggest numbers they can for everything.

Flyer, then there is the 540 cubic inch V-8 1155 which interestingly idled on four cylinders.
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