FA-56CL

[Fred Shattuck]

Hey Y'all   Was looking at the posts on the evolution 36cl and noticed the Four strokes. As I love the 51 to 61 size engines am very interested in this  four stroke 56.  Does anybody have any experience with this type of engine for C/L? Would love to know thoughts on this, both good and bad before, well... you know..   Thanks     FRED

[Bob Reeves]

It's the RC engine in CL dress. Most of us that use them have converted RC versions, Saito just made it easier. Much has been posted on the Saito 4 strokes on this and other forums.. Search all the forums for "Saito" and be entertained for a while.

[Joe Yau]

I just bought one for my TF Score (see pic below) to replace the OS .46LA-S.  Its a cool looking engine.. I should know how it works out in about a month or so.

[Fred Shattuck]

Sweet! Thanks    FRED

[SteveMoon]

Fred: Are you kidding? There are several of us on this board who have
been using 4S motors for many years. I have competed at the Nats
every year since 2002 using 4S motors. The Saito 40, 56, 62, 72 and
OS 52 are all high quality motors that deliver plenty of power for CL
applications. You would not be disappointed with the Saito 56.

Steve

[Joe Yau]

Here's a good post on the Saito FA.56 from Bob Reeves above.   He has lots of experience with these 4-Stroke engines, just do a search as he suggested.  There are also info like torque curve etc.

http://stunthanger.com/smf/index.php?topic=7707.msg65497;topicseen#msg65497

[Bryan Higgins]

Hi Fred

I bought mine a month ago, I still have to build a plane for it but i had to have one.
After reading about them from Paul Walker and Bob Reeves they convinced me that
they are a great running four stroke and the price is not bad ether.

I'm just getting back into control line flying but this site has plenty of information
on the engine and it's stats. You will just have to go back a few weeks to see the
post.

I'm going to purchase the Saito .40 c/l 4-stroke when they come out.    Bryan

[Scott Hartford]

I have a 40 in a Nobler and a Ringmaster with an OS 26 and a Ringmaster with a Saito 30. I think they run great! Sound cool too!

[Bob Reeves]

I may change a few of my recommendations once I get the new 56 running properly in my Somethin'Extra. May just be I don't have enough time on it yet but I'm seeing a much greater speed up during the flight than I have with the one on my Score or any of my 40's. If it doesn't settle down or seem to be getting any better as I get more time on it I may try Uniflow again. Hoping with the smaller choke area it will draw better and be more forgiving on uniflow than I found with my first experiments.

This Shingles mess and crappy wether has put me a couple months behind on everything I had planned for this spring, now it's looking like I may not be even ready for Brodaks in June 

[Joe Yau]

I thought they were suppose to be the same engine other then the carb..  did they change the timing or something?

[Bob Reeves]

I thought they were suppose to be the same engine other then the carb..  did they change the timing or something?

They are the same engine...

[Joe Yau]

Well, I fired it up first time yesterday on the test stand, and it started first flip!  But I had problem keeping the RPM under 4K as what Saito recommends to do for 10 mins..  Even with the NV near all the way out,  I still had to choke it down so it would run that slow, but it pulls fuel like crazy.

What I notice was the engine slowly get richer and richer all by it self about 6-7 mins into it, then I had to adjust the NV. (while keeping my finger in the venturi choking it down to keep below 4K).  I ran it for about 12mins so far.  I think the rest should be a bit easier.  I'll report back later ..   

[proparc]

Well, I fired it up first time yesterday on the test stand, and it started first flip!  But I had problem keeping the RPM under 4K as what Saito recommends to do for 10 mins..  Even with the NV near all the way out,  I still had to choke it down so it would run that slow, but it pulls fuel like crazy.

What I notice was the engine slowly get richer and richer all by it self about 6-7 mins into it, then I had to adjust the NV. (while keeping my finger in the venturi choking it down to keep below 4K).  I ran it for about 12mins so far.  I think the rest should be a bit easier.  I'll report back later ..   

It is absolutely VITAL that you keep the RPMs under 4000 for at least the first quart of fuel. Forget about time, think in terms of amount of fuel. It is important to remember that you are mating not just the usual parts as in a two stroke motor, but many more parts including the whole drive train. These motors can almost give an Enya a run for the money in terms of longevity, but you have to know what you are doing.

Done right, they are more fun than a barrel of monkeys, and you will have world class power to boot.

[Bob Reeves]

This does bring up an interesting issue.. With the RC carb it was easy to keep the engine throttled down for break-in and I always install a CL venturi after I have the engine broken in. With the CL versions (as delivered) you have no way to adjust the rpm except for the needle which does not work really well on a 4 stroke.. Solution might be to insert a temporary restrictor.. Wooden Dowel with a really small hole would work for break-in or maybe an RC carb off a converted engine.

My 56 is starting to come around, Today it was acting more like the 56 in my Score.. Just needed more time, guess a gallon at break-in wasn't quite enough..

[catdaddy]

This does bring up an interesting issue.. With the RC carb it was easy to keep the engine throttled down for break-in and I always install a CL venturi after I have the engine broken in. With the CL versions (as delivered) you have no way to adjust the rpm except for the needle which does not work really well on a 4 stroke.. Solution might be to insert a temporary restrictor.. Wooden Dowel with a really small hole would work for break-in or maybe an RC carb off a converted engine.

My 56 is starting to come around, Today it was acting more like the 56 in my Score.. Just needed more time, guess a gallon at break-in wasn't quite enough..

Are you getting through the entire pattern now?

[Bob Reeves]

Are you getting through the entire pattern now?

Yep, yesterday it was running right at 6 minutes.. I put a Rev-Up 13-7 on it in place of the 13-7.5 I am using on the other 56 and the engine really likes it. Needs nose weight, should have left the nose an inch or so longer but it's comming together..

Oh ya discovered modeling clay melts....