1200SportsterRider

I go by this to an extent.

Crankshaft Threads 1/4 x 28 Cylinder Type AAC Engine (Only) Weight 8.96 oz Muffler Type 2-piece Bore 20.0 mm (0.78 in) Crankshaft Type Ball Bearing Power Type Glow Stroke 16.0 mm (0.63 in) Displacement .30 cu. in. (4.92 cc) Mounting Dimensions 88 x 45 x 93 mm RPM Range 2000 - 12000,

Total Weight 9.28 oz,


Benchmark Prop 10x6 APC @ 9800

Jesse Open

It's what they do in the air that really counts


Setting up a 20 year old, scratch built from scratch plans, 62" Mr Mulligan with a brand, spanking new, old stock Enya 80. Break in will be in the air, as usual.

the Wasp

My Feedback: (1)

hey guys, about the poor 19y.o. woman police officer in training that die here in Vt. she was hit just about 1 mile (as a car drives) from my house. a lot of people hear are upset about this. my wife and I included. I have heard people say "things happen for a reason". well, if that is true, I just hope some people will look good at themselves as they think about her and hopefully change their lives for the better.
here's a "God Bless" for the girl that wanted to help Vermont to be a nicer place to live.

Jim

Glowgeek

Nice plane, Gary. What size is the cowl? I may have a dummy radial for it.

Glowgeek

Suggested RPM range 2k-12K......all good. I don't own an FA-30 but have owned several 56's and 62's. I propped them for 11k-11.5k on the ground......they still run great.

the Wasp

My Feedback: (1)

here you go,,,

Saito FA-30S New in Box - RC Groups

Jim

Jesse Open

Thanks Lonnie,

The opening is a nominal 147 mm.

Glowgeek

I'll check but don't think I have anything near that small, sorry.

Update: Nope, smallest I have is 9" in diameter.

Jesse Open

Thanks for looking.

A bit on the small side.

....Mr Mulligan, that is....

1200SportsterRider

Saito FA 30-s, second run
Prop=====Bolly Clubman 9.5 x 7
Fuel=====Wildcat 2/4 10% with 18% full synthetic
Plug=====Glo-Devil 4c special for Saito and Enya
Exhaust==Stock
Fuel Tank=Roto Flow 10 oz.
Max rpm sustained for 5 minutes=10,240 rpm
Idle 2,000 rpm

Glowgeek

Good numbers again, Dave. Frankly I'm a bit surprised that it only lost 1K peak rpm. Down around 10K the 30 is well short of its peak HP rpm, steep loss of power in that area.

With that 9.5x7 prop and approx 800 rpm of prop unloading in the air your LT-25 calculated speed is a smidge over 63 mph.

1200SportsterRider

Right in the ballpark me thinks, Thanks

Jesse Open

A bit more power than my old,1979 open rocker!
IIRC it turned 11,400 RPM with an 9 x 5 back then on 10% nitro.

Jesse Open

Pulled down the old (ancient) Goldberg 63 this morning. According to the log book, last flown 9-15-2022. Last year it was prepped for the season on May 05. At that time, the valves were set at my preferred .0015", cold clearances. Also the valve covers were given a dollop of Bel-air waterproof, synthetic grease. I also replaced the fibre washers that I always use under the rocker cover screw heads.
Timer on transmitter shows that the engine was run above idle for over 28 hours.
Upon today's check, the .0015" feeler slipped in but an added .001" would not. Not bad.
Last year I also began fitting annealed copper washers between the exhaust locking nuts and the head and muffler joints.
The sometimes oil creep under the rocker screws is gone and the fibre washers have a locking action as well. Any top end leakage is virtually gone.
So far the sealed, USA made MRC front bearing is holding back at least most oil.
The vent re-breather on the velocity stack is doing a good job at keeping things clean below the belt.

Won't be making any valve adustments this year, and the oil blend will also remain the same.
Just replace the fibre washers, two dolops of grease in the rockers. Bolt em back on.
Off to the field and pick up where I left off last September.





Ugly but effective

Squeaky clean. Copper can't hurt!



Lonnie, Prop Shop had this. From an old Top Flite kit. Needs paint, trimming and mounting.

1200SportsterRider

I checked some of the torque curves at Model Engine test, Saito torque grafts are mostly flat, a larger prop doesn't effect them much.
I just ran the FA 30--s with a Graupner G-Sonic 10 x 7
Same everything except the prop.


For a 10 x 7, i gets up there almost instantly.

Graupner G-S0nic 10 x 7 at full song

Jesse Open

Forgot to mention.
The engine in my posting above is a Saito FA-50GK that was purchased around 1999.

I will haul two tachs to the field later this week and grab some RPM readings from the "Test Stand with Wings"
14% Klotz / 14% Nitromethane

Saitos sure are sweet. Especially being able to run so many hours between valve adjustments.


Well broken-in Saito .45 Mk2 Idling nicely. Tach is a Fromeco TNC. One of the very last to be made.

1200SportsterRider

I ran that entire 10 oz tank through today, nearly all above 6,000 rpm with no change in rocker lash,.you are so right.

Jesse Open

LOL, Of course

The one above that was nearly 30 hours of in the air, flight time.


Approximately 5-1/4 gallons of home-brewed fuel. (By quick guesstimation)

the Wasp

My Feedback: (1)

Gary, it's funny you brought up Rockers, I had to order some today. I had said "it's about time I run that FA91". and I mounted it to the test stand and went to adjust the rockers. I adjusted one but it was loose when I removed the Feeler. I knew I needed new rockers. LOL I hope they look better than Horizon's pic when I get them.

Jim

Glowgeek

Exhaust or Intake rocker? What was worn? I'm curious because I've never seen one worn enough to worry about.

Glowgeek

Yeah! That's going to look the part!

Jesse Open

Hope so. I will get a few flights in first. Do the fitting after the flying season.


Jim, Got a rutted rocker? Like Lonnie, very surprised to hear that. Also wonder what the valve stem tip looked like?
Maybe a bad piece of steel or skipped heat-treatment.

Haha, maybe my posting about packed rocker covers wasn't totally wasted on everyone
Aren't those rockers around $30 now?
Yikes!

Ever considered dressing it on an oilstone?
.....Or is it too far gone?

Glowgeek

I have seen more than a few mushroomed valve stems. Yes, easy enough to true with a stone and oftentimes a necessary evil before removing the valve. Bottom line, if you beat the valve through the guide the cylinder is history.......pkease don't ask how I know that.

Jesse Open

Yessir,
Likewise, dragging a burred valve stem tip thru the guide. The keeper grooves can pick up a mean burr too.


Life's lessons.Learn from others when you can. Or pay dearly as you go

the Wasp

My Feedback: (1)

that was the Exhaust, I will look at the Intake.

Jim