planenutzz

I didn't change the voltage, that is what it went down to after 6 hours of use.

I had this engine modified, part of the mods was the timing which should be 30 degrees BTDC. Stock from Saito they are arounf 40 or 45 degrees which is very advanced and aggressive, might give you a bit more on the top end but makes it a very lumpy and poor performing at lower RPM.

Upon checking mine #1 was 40, #2 30, and #3 was 33.
I'll fit the MMM timing hub which will have all at 30 degrees BTDC.
Have to get a new hub locating pin as I snapped it pulling the hub, was not out enough. New one plus original hub washer and nut on the way from MMM.


Happy New Year to all. Stay safe.

darod07

Question to those which disassembled this engine:
Is it possible to remove back plate without damaging the gasket?
I like to inspect crankcase but without having spare gasket I'm affraid to touch anything.

Jaketab

My Feedback: (2)

Just a thought. Could be a small obstruction or dirt in the carb that impacts the low needle setting? I would try removing the needles and fuel line and give it a blast of solvent through the needle holes and fuel inlet.

ForcesR

Yes it is, as long as you take your time removing all components to get to the back plate, then remove the back plate slowly too.

darod07

Today I made an inspection of the crankcase after 1st full season with few dozen of flights and I'm satisfied with findings. All is well greased and looks ok. Lubricating nipple fitted by Saito is in right place. Oil drops exactly where it should, on to the crankshaft with master rod and linked conrods.
All 3 spark plugs are the same colour with black stain, what tells me that engine is running slightly rich. I'm satisfied with performance so I'm not going to lean mixture.

planenutzz

I removed mine easily, just be careful. If it sticks get a fine razor blade and see if you can gently coax it up. Mine came off with no issues at all.

planenutzz

Darod, looks nice and clean in there. What oil & % mix are you using?

I'm still waiting on the hub parts to arrive before fitting the MMM timing ring, setting timing and running it again.

cheers
me

CK1

My Feedback: (60)

darod, thanks for the pics on the location of the upper lube exit point. When I tear mine down for inspections, I will add the lube point and nipples to both of my fg90r3 engines .

darod07

It's Klotz 200 with 1:15~17 ratio.

planenutzz

same as I am using.

jimkron

Same here on the Klotz. Everything looks great. Little rich is not bad. What kind of RPMs and temps are you getting?

jim

darod07

Here is a graph from one of the recent flights onboard telemetry. Temps are in Celsius:

planenutzz

Those temps don't look a lot different to what I am getting on the test stand with no baffles. I think the worst I have seen was 136C @ max RPM of 6250.

jimkron

Those temps and rpm look fine to me. Temps could be a little cooler. But a lot depends on the air temp that day. If it was 90F air temp, those are good numbers. If it was 50F...I might worry about hotter days.
I like RPMs around 6500 in the air. Temps on warm day around 225F. This is not a cheap motor. Be nice to it.
Also, Depending on the plane, open up those cowl flaps...and use baffles.
Good job.

jim

planenutzz

I'll add that when I have been ground running mine on the test stand the days have been about 32 - 35C as it is our summer here. Will be creating an opening in the bottom where the exhaust outlet comes out to get a bit more hot air out.

horsefeetky

if i want to place a temp sensor wire around one of the cylinders which one is best to check and where on the cyl should the wire be placed.. i have spektrum telem rx for reading in flight.

also does the newest 90 need a hub ring swapped to correct timing or has saito addressed the issue and fixed it on this motor stock

planenutzz

Saito have not addressed the timing issue. They come set at 45 degrees. I'd suggest getting the timing ring, inudction back plate as well from Morris Mini Motors. He also have the Rxcel timing bits you will need and has a Youtube channel where he explains how to set the timing.

ClausBN

Top cylinder is best to measure as it will get hottest on any radial engine. I place the sensor on the cylinder as high as possible without touching the exhaust port.

planenutzz

I'm using Cockpit V2 telemetry system as I have an older JR 12X radio with no telemetry. One of the modules has RPM and 3 x temperature thermocouple probes so I can measure each cylinder.

#1 is in fact quite good on mine, it is mainly #2 that gets hotter. I expect that will settle down once the engine has more time on it. So far it has have about 6 hours of ground running, this will suffice till it goes in the model.

What is with the new layout of the RCU website? I really do not like it one bit.

hkusp45

My Feedback: (9)

Just wondering if this engine was selling at $1499 last year. I had a note on my desk for that price, but now it's $1699. Let me know if I'm correct in this price change. BTW, does Saito ever have sales on their engines? Thanks

wedoka4

Hi
Here in Germany, the prices have also risen from €1520 to €1750, the motor now costs.

BarracudaHockey

My Feedback: (11)

Yep, have you been to the grocery store lately or the gas station? Everything is going up

horsefeetky

so now the prices are high enough and you still need some mods installed after purchase i am going with a ums radial from c and h ignitions.. better support and i can get a 5 cyl for not much more investment. has the ring exhaust also included.

wedoka4

most of it is the cost of transportation.
While the transport of a standard 40-foot container from Shanghai to Rotterdam in January 2020 still cost around 2,000 US dollars, freight rates are now (13.01.2022) at over 14,000 dollars (World Container Index).
And the end user pays for that

horsefeetky

xicoy and others have gone to air pkg individual or small multi packs inside a box for shipping engines. no container needed and they take too long to get here and in our hands that way. it ads 60.00 to each turbine xicoy sends here. long way from the price increase saito put on these. big importers only think one way and that is container and large profits. ums still works with dealers to keep things coming in steady and at only an increase as needed to cover upcharges.