William Robison

My Feedback: (3)

Lee:

The prop nut and all spinner accessories for the FA-40 fit your engine.

Bill.

p.j

I was wondering if the bearings for all the mid block Saitos were all the same size, if so one spare set could be kept handy, sorry if this question was already answered.

P.J

Jack211

Bill, couple questions. I have a gift, 8 quarts of Wildcat 35% nitro fuel, and want to try it on my 82a (later on the 1.0): 1). Can I expect to get any better fuel efficiency from such a fuel? 2) What determines what prop a particular engine can turn? I've got 14x4, 15x6, and a 16x4 props coming. Which might be best for 3D flying with the Twist (4.75 lbs)/82a combination? The Twist has an 11 oz tank and I would LIKE to get at least a 12 minute flight, dependably. I don't want FAST; I just want dependable transition and power in the middle range and what's good for the engine. Will the engine be able to turn a larger prop in cold weather as opposed to warm weather as is the case with 2 strokes?

I've also got velocity stacks coming for my Saitos. (Have you ever tried sealing the O ring with clear silicone on the outside?) And I SHALL try your .0005 valve clearance on the 82a, or was that for another engine? You seemed to speak generically.

For me, it's either get that 82a to 12 min flights or put it in a bird that'll carry a 14 oz tank. My OTHER Twist has an OS .61 FX, identical tank, and I'm getting 20 min flights, one 25! min flight. With the 82a break-in 13 x8 prop, I got 10 minutes with Wildcat 15% nitro, 11 oz tank. But the 13x8 did a great job and I never tried another. I should/will.

I DID read entirely through your Saito notes. Lots of info. Thanks. And can I rent your beard? It was -32 degree wind chill here yesterday.

Thanks again,
Jack

Thanks much,

Jack

solafein

A velocity stack will make it even more enjoyable. The fuel tank that comes with the Funtana 40 is a wee bit small. There are threads here at RCU that go into detail about the modifications necessary to mount the FA 91. With no weight added and the flight pack as far forward as I could get it your CG will be at the back of the range, where you want it.

p.j

Thanks for the info Bill.

P.J

William Robison

My Feedback: (3)

PJ:

Sorry. It would take three different front and two different rear bearings to get the coverage. But if you have nothing smaller than an FA-65 you could eliminate one of the front bearings.

Leaving the smaller ones out you'd need a 608C-2RS and an R6C-2RS for the fronts, a 6901C-TH9 and 6902C-TH9 for the rears. To have the little ones covered too you would add a 698C-2RS

These numbers are for the ceramics, the fronts are double sealed, the rears have the polymite cages.

Bill.

William Robison

My Feedback: (3)

Jack:

Quote:

ORIGINAL: Jack211
I have a gift, 8 quarts of Wildcat 35% nitro fuel, and want to try it on my 82a (later on the 1.0): 1). Can I expect to get any better fuel efficiency from such a fuel?

Sorry, this one wont fly. Higher nitro percentage means higher fuel consumption. If I had those two gallons of 35% I'd get two gallons of 5%, mix them together and have four gallons of 20%. That's still higher than I normally run, but it will work, and going beyond 20% in a Saito doesn't seem to add much exzcept higher fuel rates.

Quote:

2) What determines what prop a particular engine can turn? I've got 14x4, 15x6, and a 16x4 props coming. Which might be best for 3D flying with the Twist (4.75 lbs)/82a combination?

For 3D flight it's pretty well established that 3.5" to 4" pitch is best. From that point you pick the diameter to load the engine to the desired ground rpm. The FA-82 will probably pull your 16x4 fine.

Quote:

The Twist has an 11 oz tank and I would LIKE to get at least a 12 minute flight, dependably. I don't want FAST; I just want dependable transition and power in the middle range and what's good for the engine. Will the engine be able to turn a larger prop in cold weather as opposed to warm weather as is the case with 2 strokes?

Burning 15% fuel, adjusted properly, at 100% power, the 11 ounce tank should run a little under 14 minutes with the FA-82. If you average 70% power you'll come close to 20 minutes. As I said, this is with 15% where I've experimented. Burning 20% should not be a lot less, but using 35% will cut these tines in half. Also, my times were using the intake stacks and Bru-Line air filters.

Quote:

I've also got velocity stacks coming for my Saitos. (Have you ever tried sealing the O ring with clear silicone on the outside?

Yes, I've used RTV on the intake o-rings at the cylinder end but not on the stack. I can't see why it would hurt anything, and might help.

Quote:

And I SHALL try your .0005 valve clearance on the 82a, or was that for another engine? You seemed to speak generically.

DO NOT SET YOUR FA-82 to 0.0005" LASH. The FA-82 has the late style cam with quieting ramps, 0.0015" is the setting, or 0.002" at most.

Finally, Jack, PLEASE do not mention Oriental Scrap engines here. I must admit, shamefully, that I have some too, but I don't brag about how good they are. But I do cuss when forced to admit my 46 FX still hasn't peeled its nickel plating. Oh well.

Hope I got all your questions, didn't miss any.

Bill.

sl1200mk2

Hello,

Dumb question, I plead my ignorance here. This is my first 4 stroke and only my 2nd engine - first was 2 stroke .46 evolution. What's the nipple on the back of the crank case on the Saito .91 for? Is it part of the vent return line (using a T-cross with the other end on the muffler) or is it a line to expell half burned fuel? Does the line run out on it's own under the air frame?

Sorry.. the Saito manual doesn't go into any setup detail at all, nor are there any setup articles on the Horizon site. I'm still a newbie! Putting together my first ARF (second plane) - the first being an RTF glow trainer, so this is a learning curve for me.

I'm reading this thread as much as I can - especially the break-in and tuning tips. I have a feeling I'm really going to like the Saito's. I want into the club!

Thanks!

Wayne

William Robison

My Feedback: (3)

Wayne:

Put a length of fuel hose on the rear nipple, and run it out the bottom. It is indeed the crank case breather.

And you are in the club as number 200.

Bill.

Kmot

My Feedback: (24)

Vent for the engine. Run a line from it outside your plane. It drips oil.

sl1200mk2

Nice! I like the even number.

Regards,

Wayne

crazy4planes2000

hi
i need to replace the cap screws, which hold the cylinder to the crank case on a fa65. can you tell me what thread is required please.

Garry

William Robison

My Feedback: (3)

Crazy:

The FA-72 is 3.5 x 0.6 mm thread, 12 mm length. The FA-65 should be the same. But the complete screw set from Horizon is not expensive...

Bill.

rlmcnii

My Feedback: (3)

Saitoites,
Are the plastic covers on the .82s also problematic? Or, was this a problem with the early .72s, or all .72s? If troublesome in all of these engines, is there a metal replacement available, or a re-designed plastic part?

I have an .82 that has been flown a bit..with no problems and a new .82. Just wondering.

Thanks, rlmcnii

rclement

My Feedback: (1)

Hi and thanks for the info. I didn't see your reply earlier. I've got the 91 mounted and it's ready to fly. I hadn't heard about the fuel tank being small. I'll check into that. THanks again. [8D]

jlkonn

My Feedback: (1)

I have my Saito 1.00 apart for bearing upgrade to ceramic.
Bill pointed out the part #26 on the exploded view that came with the engine instructions.
For the life of me I don't see this part on the actual engine.
All I see is a step on the front of the crank that goes into the front bearing.
Does anyone have an actual photo of a crank with and without this part #26?
Thanks!
JLK

w8ye

My Feedback: (16)

Item number 26 is only on the 50 and 56 series engines.

Enjoy,

Jim

w8ye

My Feedback: (16)

The earlier plastic backplates on the 72 size engine were problematic. Saito re-inforced the design a little and the later ones seem better.

The 72's have a problem with the stability of the upper junction of the intake manifold with the head. The intake manifold will vibrate in and out at this juncture due to flexing of the backplate carb bracket.

The 82 has the plate designed a little different and so far, there hasn't been any problems.

Enjoy,

Jim

w8ye

My Feedback: (16)

Wayne was wanting to know about set-up articles....

In addition to all the great information available on RCU....

There is also a informative web site with a lot of information about Saito's.....

http://saito-engines.info/

Enjoy,

Jim

rlmcnii

My Feedback: (3)

w8ye,
Thanks for the reply. I had inspected my two .82s and could feel no movement of the intake pipe where it enters the head on either of them. Glad to know the flexing backplate has been corrected. rlmcnii

jlkonn

My Feedback: (1)

Whew!
I feel better...

JLK

crazy4planes2000

Hi.

Bought a fa45s in the week from Just Engines in the UK. Any advice regarding this engine will be very welcome. Thanks.

Garry[sm=thumbup.gif]

donkey doctor

Hello; I have 3 fa45's and one fa45s, I use 15% XP fuel, but have used powermaster, mean green, cool power, Sig 15% four stroke, and even my own mixed 0% fuel, It runs fine on all these. I use an 11 x 7, APC or MAS, or an 11 x 6. There's not very much I can warn you about, I have been using one or another of these great engines since '92 with no problems at all. The earlier 45's had the carb mounted on a tab on the back cover that would break off in a crash, but the "s" version has a much stronger setup, the same as the 50's or the 56's[img][/img]

w8ye

My Feedback: (16)

Enjoy your new engine. Congradulations.

The 45S was originally a ABC type cylinder. Don't know if it still is?

New ones are not available in the USA

It will last until you break it or loose interest.

Enjoy,

Jim

donkey doctor

Hello; Which one did you get?