William Robison

My Feedback: (3)

All:

Quote:

Orginal: JNorton

...especially the newsletter which distills this rambling missive...

Please, no more PMs and emails - John's reference to a newsletter must have been to Saito Notes, there has never been a news letter here.

Bill.

w8ye

My Feedback: (16)

WHICH WAY?

There is a chamfer on the i.d. hole of the big end of the rod on one side. This tapered or beveled side goes towards the crankshaft.

JNorton

My Feedback: (2)

OOPS sorry it was indeed the Saito Notes.

mred33

Greetings;
I'll try this again. What is a good replacement for a two stroke engine for sport flying, not 3D flying. I used to fly a Dreamer with an HP-40 and it flew great on that. I am getting another one and would like to put a 4 Stroke on this one. I was thinking maybe a 56 or something. Is this anywhere in the ball park for sport flying 40 size planes????? I have a 100 and 125 and I know they are both to big. Thanks.
Mr Ed

JNorton

My Feedback: (2)

I use the following rule of thumb. Take it for what it's worth.
A .46 2 stroke is equivalent to a .70 4 stroke
A .60 2 stroke is equivalent to a .91 4 stroke
A .91 2 stroke is equivalent to a .1.20 4 stroke
John

Hobbsy

My Feedback: (102)

Thanks Jett, I took my last antibiotic and my last super duper cough syrup day before yesterday, my voice is not quite normal but all pain and most of the coughing are gone. I love not being sleepy all the time from the cough syrup and the Amoxycillin.

William Robison

My Feedback: (3)

All:

New members and numbers:

421 kinnaird
451 kf6gub
452 Great-North
453 rgdea
454 msm411
455 RC-Bearings
456 kf6gub
457 Great-North
458 thanosg2004
459 az3d
460 Jarrah
461 rcavi8or
462 rickswl
463 roboto65
464 turboapache
465 LDM
466 bps
467 JNorton
468 drdivinity
469 RPM1
470 nilsreinert123
471 stinger40
472 angrycookieman
473 imsofaman
474 Jim Henley
475 joooe6
476 curtis robison
477 timLQ
478 dgiordano
479 mred33
480 hentie
481 dirtyoldman00

Welcome all.

Remember, to get a copy of Saito Notes I must have your email address - too big to go through RCU.

Bill.

William Robison

My Feedback: (3)

Yeah, I know, Great North is in twice. Hs number will be 452, 457 will be reassigned.

Bill.

roboto65

My Feedback: (30)

Thanks for the number Bill we will have to recruit you some help with this list Thanks for all the great reading about our Saitos!!!!!

rlmcnii

My Feedback: (3)

mred,

I don't know what type of a flying machine a Dreamer is. However, when I re-entered R/C a couple of years ago I did so with a Sig LT40. Sig recommends a .40 two-stroke for that airframe. It flew pretty well with a Saito .50 but was a little under-powered. The .56 probably would have been right on the button. Bear in mind that this was a set-up for a rookie.

Saito has apparently just introduced a new .62 which is just a bit heavier than the .56. The older .65s are evidently nice engines, but they are heavy...they eventually became the .91.

Another little bit of information if you are not familiar with Saitos; the .82 is a larger version of the .72 and are , as I recall, a little lighter than the .72s. And, benefit from a little more development.

Saitos are a little particular when it comes to tuning. Adjust the HS needle ONLY at wide-open throttle and then tune the LS needle for a good transition (the LS needles are set alarmingly rich when the engine is new). I broke mine in according to the instructions with the engine. Many posters in the thread have reported several different break-in methods. There are also many post about tuning...it won't take more than two or three days to find them!!!

In any case, when properly set up the Saitos are very pleasant. Very fuel-efficient (tune the LS needle!!), easy to start, real nice exhaust note, and rarely (nearly never) a dead-stick.

Enjoy.

Hobbsy

My Feedback: (102)

Good post R, I just recently broke in a .62, it's a winner in every respect. The carb pic. shows where the LS needle was set when recieved, it now resides about 1/2 turn leaner than what you see. The prop was a Bolly 13.5x6. It's not often you can get a rock steady idle like this one.

jb86

My Feedback: (8)

i'm coming to understand that saitos run lower rpm than i am used to. my understanding has always been to run four strokes right about 10k. my os 70 fs is about 10,300. my 91 fs w/pump just about 10k (14x6 apc), i tried a 14x8 (balanced), it vibrated like crazy and ran upto just under 9k, didn't like it i guess. my 120 w/pump runs 9900 on 16x4w, i've seen that people are running 16x6 about 9100. i expect the bigger the engine, the lower the rev's. i was surprised just how low the rpm was that you are running on the .62, and larger props than i would expect on a .62. i would expect that for 3D flying, it would need a prop to allow it to rev a bit higher though. i have saitos; .72, .82, 1.00. i would plan 14x4w (close to 10k?); fa .72, 15x4w; fa .82 (about 9500?), 15x6; fa 1.00 (about 9500?), am i about right with these props and rpm range? i've been told to use 14x4w in .82, but that would have to run well over 10k.
jon b

Hobbsy

My Feedback: (102)

Saitos will run at higher rpm but there is very little point if it gets the job done at 9,200 and in my view a prop with 4 inches of pitch is just a stick serving as a flywheel. I think I have some numbers for the .82 and 1.00

If I have these pics. lined up right the first two are the .82 turning an APC 14x6, the third is the 1.00 turning a Graupner 14x8 on 5% nitro.

RVM

But damn can those sticks give a lot of thrust.

Jimmy Hoffa

My Feedback: (3)

Especially if they are the wide blade version.
Phillip

Hobbsy

My Feedback: (102)

I recon they're the equivalent of 4.56 gears, they do have their place.

IronCross

A Saito .72 with an APC 14x4W will pull tree stumps.... Sure brought my Decathlon to life...

mc6390

My Feedback: (2)

Hell to all,
Just purchased my first 4 stroke, Saito 150GK. It is an older model, has an A stamped on the mounting lug. It has never seen any fuel, but mounted in a display plane. I have noticed that the low speed needle is protruding out about 1/8", not flush. When I look into the carb barrel there is a 1mm gap between the spraybar and low speed needle, but way off center. If I screw the low speed needle flush with the throttle arm it closes the gap to almost nothing. How do I center the gap in the carb barrel and have the low speed flush with the throttle arm, so I can get this motor broken in. Also should I take a look at the bearings for rust, it does turnover smoothly. I'm gussing the motor is around ten yrs. old or so.
Thanks to all,
Mark

w8ye

My Feedback: (16)

To my knowledge none of them have a gap.

Your 150 being the very first one produced will have very high compression. Use low nitro fuel in it or it will throw the prop.

mc6390

My Feedback: (2)

Yes, the box is gold and black. Labeled Hemi-Head, High-powered, High Cam Series. I plan to use 10% nitro fuels in it.
Thanks

Hobbsy

My Feedback: (102)

Gose your 1.50 look like this one, this is an early high compression one, a 1.50s.

mc6390

My Feedback: (2)

Yes, but has a few differences. Does not have the nipple below the push rods,has the gold rocker covers, and is not labeled 150 on the right side like yours. Just smooth in that area, does say Saito on the left side in that aera though.
Mark

gjeffers

10% is a very good choice, i use omega 10% and on my saitos it is the smoothest running fuel i have found(especially in my 125 and 180)

w8ye

My Feedback: (16)

Hobbsy added the nipple on the rocker cover himself.

The "150" is a metal sticker glued on the side. It may have fallen off?

mc6390

My Feedback: (2)

Omega seems to be a good choice, from what I have read in all the posts. Looks like I made a mistake, I bought 12 gal. of Wildcat 2&4 stroke, 18% syn. fuel from my local club. Wished I would of read this forum before my fuel purchase. Guess I will have to get some catsor and add 3-4 oz./gal. Will the addition of the cator be to much oil content?