William Robison

My Feedback: (3)

krop:

Quote:

...What else do I need to do to join your Club SAITO?

Nothing.

Youi are now number 249, and glad to have you.

Bill.

krop

My Feedback: (19)

Bill,
Please send a copy of your SAITO Notes to Mme also
Thank you.
krop

William Robison

My Feedback: (3)

Krop:

Even disguised with the angle brackets that address can be pulled, some of the later scanning ones will recognize it and delete the brackets.

Notes are on the way. Hope they do some good for you.

Bill.

spec36

i just got a 65 at a sale new in the box is this a older saito








#245[img][/img]

William Robison

My Feedback: (3)

Spec:

The FA-65 is still in production, the last of the "Old Breed" ABC single cylinder engines. Could be only a month old, could be ten years old. Or older.

Bill.

spec36

i paid 85.00 think i got a deal








#245

gjeffers

go ahead, rub it in

spec36

i would like to turn a 13x4w on a v2 46 im running a 72 on one now and it has plenty to spare i think the 65 would do just as well . is the weight the same as the 72 the case looks the same.

William Robison

My Feedback: (3)

Spec:

White box and TN carb, it's pretty new.

As I said, it's an ABC, and is fairly heavy, close to three ounces heavier than the FA-72.

But it will spin a 13x6 prop with no trouble. Or the 13x4W.

Bill.

spec36

ok thanks might save it for something later one more ? i was looking at a 120 and 125a are these the same weight and what is the best buy looking for motors for 3d v2 or f90 thanks for all the help i was going to go talk with the hobby shop today but had to start annual on my real plane .

powerlines

Well put me back on the books for a 125 GK. 1st GK I have had. It is a monster. I have not run WOT on it yet but I can't wait. It has way more than the 100 and 120 So I can see. Then again. My 120 has issues. Can't wait to get that running also. I may put it on a HOT four Star 60!!


That would be good..

LATER

And thanks agian for all the help!!

William Robison

My Feedback: (3)

Spec:

Engine _ Weight (oz.)

_FA-40 _ 10.6
_FA-56 _ 15.5
_FA-65 _ 19.0
_FA-72 _ 16.6
_FA-82 _ 16.0
_FA-91 _ 19.6
FA-100 _ 19.5
FA-120 _ 28.0
FA-125 _ 21.9
FA-150 _ 30.0
FA-180 _ 31.0

All weights are for the AAC versions except the FA-65, which is ABC cionstruction.

The FA-125 is slightly less powerful than the FA-120, the advantage of the 125 is its lighter weight than the 120.

Bill.

spec36

sounds like the 125 would be the one for me thanks for all the help and I took notes on the weights

loughbd

It's not the old one. The old ones cam in a one piece blue box. It out to turn a 13x6 around 9900 rpm. I just replaced the bearings in one and on 10% all castor it turned that speed. Great engine

bldrums

Hey William
( good day to ya )
Personally, I would probably not be able to tell the difference in 1.20 vs 1.25 myself but, I dont understand how a 1.2 can be more powerful than a 1.25? Just curious.


Bill

William Robison

My Feedback: (3)

Bill:

What it comes down to is breathing. The FA-120 is a "Big block" engine and the FA-125a is a "Mid Block" size. The ports and valves in the FA-120 are about 25% larger diameter than the ones in the FA-125. A 25% increase in diameter gives more than 1.6 times the port area. Bigger gives better breathing, more fuel and air in the cylinder, more power.

Ergo sum.

Bill.

loughbd

A 1.2 can easily be more powerful. Higher valve lift, longer valve duration, better cam profile, higher compression ratio. Same way a small block Chevy could produce more power than say a 350. Lots of way to increase power.

loughbd

A 1.2 can easily be more powerful. Higher valve lift, longer valve duration, better cam profile, higher compression ratio. Same way a small block Chevy could produce more power than say a 350. Lots of way to increase power.

spec36

can you improve the breathing by working on the ports to get some of that 25% back without touching the valves. or just leave it alone

loughbd

Not even. First a 4 cycle doesn't have ports like a two cycle you can mess with. Second , it's valves and valve train that make the big difference. Third, you aren't going to get a 25% increase doing anything. 25% is a HUGE increase

William Robison

My Feedback: (3)

Spec:

You can play with the ports, but you can not enlarge the valves without a lot of trouble. The seats in the AAC engine are a plating of chrome over the base aluminum. Just lapping the valves can damage the seat, that's why I strongly recommend never trying to reseat a leaky valve - just get a new one.

The ABC engines were different, they actually had a bronze valve seat. Lap if you must, you wouldn't kill the engine.

Bill.

loughbd

What are you calling "ports"?

spec36

ok thanks when i get one i will post more and see what we can do ..

Kmot

My Feedback: (24)

For a fella with 500 model engines...............

The Saito, like all engines have ports. In the case of the 4 cycle engines they have a single intake port and exhaust port. Albeit short, a port none the less. You could enlarge, or reshape, or polish, or do all the sorts of things one normally does to an engine.

Motorbrain

The intake port is where the air goes in, and the exhaust port is where the air comes out.

Motor Brain.