retransit

My Feedback: (18)

Have you weighed it?

Bob

w8ye

My Feedback: (16)

I run a 13 X 6 APC on my Saito 62 all the time. Seems to handle it very well. Have the engine on a Ultra Stick 40 and it will climb vertical as far up as you can see to control it.

japes999

My Feedback: (9)

I made a water landing with my FA-120 this weekend - older style with the brass mid range disc on the carb.Iquickly dismantled everything, yes every part,and rinsed it it and oiledit all down. I reassembled and nowmy RPMdropped from 8900 before the crash to about 7600 now. Funny thing is is that is actually seems to runevery bitas reliable as before, maybe even more so, seems totransition better, start better, etc. Main bearing seemed just fine and smooth as can be, and I put innew OS Type F glow plug too.

I am swinging a Master Airscrew K-Series 15x8, withCool power 10% nitro. I would be more alarmed, but the thing runs like a swiss clock, with no bad manners what so ever, (although it does seem to gain about 200 RPM if you put the glow charger back on at full throttle).

Any suggestions to what it could be? do I just need to break it in more after the reassembly? Especially considering it had very low hours before the crash, (less than a gallon of fuel).

Any ideas? Does anyone have any suggested RPMs for a 15*8 MA K-series prop?

w8ye

My Feedback: (16)

Your old style 120 has less valve action than the newer 120S version. The 120S has mushroom cam followers that give more valve openness for a longer time.

The engine is doing about what it is supposed to considering the cam.

retransit

My Feedback: (18)

I'm running a 13-4 APC on an O.S. .61 4-stroke on a land-based Goldberg Cub. I fly at 1/3 throttle.

Bob

frets24

My Feedback: (15)

Bob,
16.5 oz on the fa62; 20oz on the fs70- header only on both when weighed. (see edit above) the cylinder on the 70 would totally eat up any cowl on the cylider side, thus allowing only for a butchered up 2/3 cowl....not pretty...
with the wheels on it instead of floats it was great, plenty of power to spare...that's why I was quite surprised at the dismal seeming lack of power with the floats. contrary to what you might think, though they add some extra weight, the increase in drag is very little over the wheels.


W8ye,
what kind of rpm are you getting on your 62 with the 13x6?

japes999

My Feedback: (9)

w8ye

Thanks for the info, sorry I just edited my earlier post to include more info. I just dug up some old RPM notes I had, and that jogged my memory.

retransit

My Feedback: (18)

frets24,
I was referring to the total aircraft weight, not the engine weight.

Bob

NM2K

My Feedback: (14)

What about a Saito .82? Same mounting footprint as the .62 with longer cylinder barrel.

I wasn't saying that a 13x6 was too much. I was saying that it is pretty much the largest prop most folks would like to run on a .61 or .62 sized engine.

A 14x8 was considered a 1.20 sized prop not long ago.


Ed Cregger

frets24

My Feedback: (15)

Oh! Now I feel silly.[&:]

Without floats=6lbs 12oz. At that weight it floated so badly on landings that I fastened a 2.5lb lead wieght(gross weight 9lbs1oz) right at the CG in the cabin so that it would behave on landings and still have some control surface authority, though it still seemed to rather hover before touchdown. Even with the ballast, the flight characteristics were good. Climb rate was good at 3/4 throttle, Aileron rolls, barrel rolls and loops were pleasant, and stalls were predictable and self recovering. Normal cruise at 1/3-1/2 throttle.

The floats weigh a fat 3lbs 2oz, (gross 9lbs14oz) all hardware included and rear struts. Yes, I remembered to removee the ballast when the floats went on. I may whip up a set using blue foam sheets and see if I can get a significant weight savings...the ones on it are the GP 40 size kit-they're pretty stout!

w8ye

My Feedback: (16)

With 10% Wildcat, I get about 9200 with a APC 13 X 6 on the Saito 62

frets24

My Feedback: (15)

I may have to look into that 82, thanks for the heads up.

I remember, not long ago, when I started out in R/C, the guy at the LHS telling me that to get a 4c for my Sr Falcon that would equal the K&B .61 2c I'd need a 90 or a 100....That was around '76....Thanks, Ed, now I feel old!!

W8ye, thanks.
That's what it looks like I wrote on the cowl, (or should correspond to a 12x8 at @ 9200). If I can get that kind of R's out of it again all would be great! Another 11-1200 would do the trick I'm sure.

mike early

Any of you gentlemen run a 3-Blade on a Saito .82? Any suggestions? Running a 13x8x3 on my .91.


Does the .82, with it's shorter stroke, like to rev more than the .72 and the .91?

nitrobeast

Hey guys

Im in need of a little help.

Saito 82, vess 14x6, omega 4 cycle fuel 15%, OS F plug.
Idle around 2500 rpm's, but shakes a lot at idle. It was at 3000 rpm's before, i started to lean in the bottom a little and now have it at 2500. Can the bottom end still be too rich causing it to shake and have a higher idle? Im gonna assume the weight of the vess prop might also have something to do with the idle not being as low as most?

thanks for the help

Cherokee Flyer

"I made a water landing with my FA-120 this weekend - older style with the brass mid range disc on the carb.Iquickly dismantled everything, yes every part,and rinsed it it and oiledit all down."



When you put it back together, are you off one tooth on the cam timing?

L.

retransit

My Feedback: (18)

Maybe it's just me, but I never add weight to an aircraft, except to get the CG in range. Those floats seem kind of heavy. Try a pair constructed from foam. Your gross is getting close, if not over, the limits for a .62 4-stroke in addition to the drag associated with the floats hanging out there.

Bob

japes999

My Feedback: (9)

Cherokee,

Good observation, I tried my best to get the timing right, but the whole time I was doing it, I was a bit unsure of myself. Can someone explain the proper procedure to me? The manual isheavy Chinglish and I was pretty confused.

Craig 01

Cherokee,

Good observation, I tried my best to get the timing right, but the whole time I was doing it, I was a bit unsure of myself. Can someone explain the proper procedure to me? The manual is heavy Chinglish and I was pretty confused.




Crank at TDC,camgear indicator dot directly down.You can stick a drill bit,wire rod through the inlet cam follower bore with lifter/follower removed that fits perfectly in the lube/timing locater hole on the base circle of the inlet cam.Centre your locater in the lifter bore and place the cam cover squarely over its mounting on the case with crank at TDC.

Reply by W8YE

This is the way I have been doing it for years

However, with the Saito's with the flat plate cam cover it doesn't seem to work as handy as on the round cam cover engines. If you seem to have trouble, you can try the razor blade or Exacto blade stuck in the gear teeth along the side of the cover while inserting.

Find something that works for you



_____________________________

Attended the CutFinger Institute of DirtNap University for years but never did graduate....
Recipient, Mangledhand award August 2008
Club Saito Member #7
Original AMA #31261

MaxAdventure

My Feedback: (7)

Just for a fun comparison - I have my 20yo GP 76" cub (L4 scheme) with my first Saito, a .65 I fly every once in a while. I"ve been on the water a couple of times with the GP floats
Aircraft weight on wheels = 7.4lbs
Float weight = 2.6lbs
currently trying a Zinger 12X5
Flying out of Boulder, CO ~ 5400MSL
Doesn't want to land at touchdown like you describe.

I had problem getting off the water last time I was out - smooth lake and bad bearings - I've since replaced the bearings and the engine is obviously peppier, I just haven't made time to get it on the water.


I was also recently handed a Saito .80 to try out on the front of the cub to get it off the water. - think this is a bit overkill! I also don't think I can get the prop clearance to run it.

blw

My Feedback: (3)

You are on the right track. Keep leaning the ls until it stops transitioning smoothly from idle to wide open. Then, richen it about 1/16th to 1/8th a turn and fly it to see. Listen to the engine while it is in the air. You should be getting the idle down lower.

blw

My Feedback: (3)

You are club member #702. Nice collection of engines.

Richen the low speed needle some and it should smooth out and quit backfiring.

nitrobeast

Sounds good, thanks...One more thing..Trying to start this thing by hand has proven to be a real pain and I dont want to use the starter on it. Can that also be because of the rich LS setting? My buddy's saito 82 fires up on the first or second flip. His idles around 1500 rpm's!!

retransit

My Feedback: (18)

If the water is like glass, the floats tend to stick and it is hard to break the surface. Try taxiing in a circle to create some wakes that will alleviate the condition.

Bob

frets24

My Feedback: (15)

Glass water is very deceiving, you'd think it would be the ideal, but even full scale have a real problem trying to pull away from the high surface tension of smooth water.
Nice looking Cub there MaxA...perfect mount for a Saito! It looks like we are about even up on weight. I've got the rear fin up under mine so that adds a bit in the rear and twice again in front for balance. ( 2oz rear and 4oz on the float tips)
In ref to Bob Re. adding wieght...I'd never dream of adding extra weight without a darn good reason But like MaxA says "Doesn't want to land at touchdown like you describe." The lift on that 77"x12" wing is ridiculous, at landing, the plane is moving so slowly that the surfaces lose all authority and it still wants to fly! Forcing it down yeilds a bounce and stall unless you're really tight on the sticks to hold it down. conversely, trying to just let it settle-in as a normal landingyeils something very much like a wind blown leaf settling onto the ground. A few pounds of lead helps a lot! The plane doesn't really seem any different at take off, cruise or aerobaticly though.

Now back to all things Saito, Thanks for your indulgence on the float thing, but there are several threads on that topic.
As for the 62 I think bearings are the culpret and have some new ones on the way.

Thanks all.

stallwart

I run the MA 12x8x3 prop on two of my 82a's. I find it to be a good warbird prop.