RE: GAS Saito

RE: GAS Saito
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RE: GAS Saito - 2/20/2008 1:36:55 PM

Tsutomu Mabuchi

Posts: 662
Joined: 7/10/2004
From: Yokohama, JAPAN
Status: offline

Sorry, I haven't run mine yet, so have no suggestion for prop size.
Important notice
A friend of mine informed me of FG-36's run today.
He flew his airplane FG-36 on it yesterday. After 3 flights he noticed his FG-36 had no
compression.
He opened the rocker arm cover and found the rocker arm shaft in the exhaust side
was scorched by heat. The oil did not spread to the rocker arm shaft then the exhaust
side which hot exhaust air goes by got damaged although his gas was 20:1.
He primed oil to the shaft then the engine recoverd normal compression.
He suggested me I should prime some oil to the rocker arm shaft before the first run.
His engine was installed inverted, but it seems that FG-36 requires some drops of oil
on the rocker arm at the initial run whichever the installation is.
He also said that much of oil was drained from the breather nipple since the gas had
much oil than usual.
I didn't read the manual thoroughly yet, but we should know this.

Tsutomu Mabuchi

(in reply to togatoga)

Post #: 176

RE: GAS Saito - 2/20/2008 2:23:41 PM

Flight Risk

Posts: 272
Joined: 6/7/2003
From: private, CO, USA
Status: offline

Unless the manuals says to specifically oil these parts, he should contact Saito and ask for some replacement rocker parts, since they have been heat damaged. Why do you say to oil at the initial run, but not every run?

Rod S

< Message edited by Flight Risk -- 2/21/2008 1:54:57 AM >

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(in reply to Tsutomu Mabuchi)

Post #: 177

RE: GAS Saito - 2/20/2008 2:48:59 PM

Tsutomu Mabuchi

Posts: 662
Joined: 7/10/2004
From: Yokohama, JAPAN
Status: offline

quote:

ORIGINAL: togatoga
Anyone tried the Bolly 19x8 or 20x8. From what I can see, the 20x8 seems to give beter thrust than the 19x8. Need to get one -any suggestions?It'll be for an aerobatic sukhoi type plane.

I don't know which prop is the best, but most fliers in Japan seem to use Mejzlic 19x8.

Tsutomu Mabuchi

(in reply to togatoga)

Post #: 178

RE: GAS Saito - 2/20/2008 2:57:33 PM

Tsutomu Mabuchi

Posts: 662
Joined: 7/10/2004
From: Yokohama, JAPAN
Status: offline

quote:

ORIGINAL: Flight Risk

Unless the manuals says to specifically oil these parts, he should contact OS and ask for some replacement rocker parts, since they have been heat damaged. Why do you say to oil at the initial run, but not every run?

Rod S

He said he would keep watching the engine, and contact Saito.
Of course Saito would replace the part if he calls.
Yes, oil drop may need every time, but it may spread to the head slowly
in some time.

Tsutomu Mabuchi

(in reply to Flight Risk)

Post #: 179

RE: GAS Saito - 2/20/2008 8:21:24 PM

bhorton

Posts: 32
Joined: 2/19/2003
From: Corinth, MS, USA
Status: offline

How would a Giant Super Sportster do with this engine? 82" ws, 13-14.5 lbs.

Would there be an issue balancing the plane?

(in reply to pettit)

Post #: 180

RE: GAS Saito - 2/20/2008 9:53:32 PM

outacontrol41

Posts: 1263
Joined: 11/27/2004
From: Girdletree, MD, USA
Status: offline

I believe there might be an issue with the engine's lubrication. I don't like the sounds of this.....

(in reply to bhorton)

Post #: 181

RE: GAS Saito - 2/21/2008 7:08:02 AM

kochj

Posts: 1503
Joined: 12/5/2005
From: Victoria, MN, USA
Status: offline

The GP Giant SS balances with there Fui 32gasser w/o balast either way.....
You wouldn't have any issues with it......
I may pick up the GIant Super Chipmunk and throw the saito gasser in it..

No sure though....
Too may aerobatic 3D planes to pick up first, and they will not work with this saito....

Justin

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Post #: 182

RE: GAS Saito - 2/21/2008 10:27:48 AM

togatoga

Posts: 307
Joined: 11/26/2004
From: Singapore, SINGAPORE
Status: online

Thanks Tsutomu, I'll go hunting for that prop.Thanks also for the tip on oiling the rocker assembly.I hope its not required everytime we run the engine.That will be a pain and would sindicate a lubrication problem.Maybe someone in Japan could approach Saito and ask for an explanation.We guys would have massive problems trying to communicate let alone get thru' the proper channels!
Hate to see my investment go down the drain for lack of lubrication.

(in reply to kochj)

Post #: 183

RE: GAS Saito - 2/22/2008 4:10:20 AM

kochj

Posts: 1503
Joined: 12/5/2005
From: Victoria, MN, USA
Status: offline

I would think that this engine would need some of the same maintenence that a RCS radial or single would need!...
I would get ahold of one of there manuals and check to see if there are any pointers......After all, this is Saito's 1st gas engine to be mass produced, and it may have been left out!.....
Justin

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Post #: 184

RE: GAS Saito - 2/23/2008 12:50:42 AM

Tsutomu Mabuchi

Posts: 662
Joined: 7/10/2004
From: Yokohama, JAPAN
Status: offline

I checked the japanese manual.
Items that seem to relate to lubrication or heat are:

1. Do not lean the mixture too much, over lean may cause overheat which
may damage to conrod or cam gear.
2. This engine is lubricated by blow-by method, use the oil of good quality.
(Ex., Power Lube, Klotz GS RCmodel Lube, Cool Power, Amalie)
3. Use the gas of 20:1 for the first 20 flights then you may adjust the ratio
up to 30:1. Use 20:1 if you are not experienced in model engines.

There is no suggestion in the manual to oil the rocker arm shaft before running.
I will call my friend to confirm if he informed Saito of the damage.

Tsutomu Mabuchi

(in reply to kochj)

Post #: 185

RE: GAS Saito - 2/29/2008 3:18:21 AM

SteveD-RCU

Posts: 644
Joined: 1/21/2002
From: Sault Ste Marie, ON, CANADA
Status: offline

I'm thinking of getting a pair of these Saitos for my Ziroli DC-3 which currently has a pair of the older style Fugi 32's in it.They turned 18x10 props at about 67-6800.I'm wondering if these engines would up the performance numbers a bit while at the same time giving that great sound of a four stroke twin engine bird.I also have a pair of 17x10 3 bladed Biela CF props .The 32's flew the DC-3 ok but I would like to set up a twin-sync on it and there is too much ignition noise from these engines for this setup.The shielded cap and ignition wire on the Saitos would be a better setup for this purpose.

(in reply to Tsutomu Mabuchi)

Post #: 186

RE: GAS Saito - 3/6/2008 4:44:01 AM

kochj

Posts: 1503
Joined: 12/5/2005
From: Victoria, MN, USA
Status: offline

anyone know if this saito engine would work in a GP GIant Chipmunk???????????????/

Would the engine shake the plane apart???

Justin

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Post #: 187

RE: GAS Saito - 3/6/2008 2:57:52 PM

SteveD-RCU

Posts: 644
Joined: 1/21/2002
From: Sault Ste Marie, ON, CANADA
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Kinda big for the Chipmunk,I don't know Justin if it fit wouldn't it be nose heavy?
I ordered my Saito gasser last week,should have it anyday...

(in reply to kochj)

Post #: 188

RE: GAS Saito - 3/6/2008 8:59:57 PM

kochj

Posts: 1503
Joined: 12/5/2005
From: Victoria, MN, USA
Status: offline

I just ordered it up......
Guys are installing fuji 32cc gas and ROto 35cc gassers in the plane
and needing zero balast....... The plane is quite tail heavy so the weight
would be to it's benifit!.....

I sent a PM to Mike C.....asking the differnece between the 220 glow and
the gas engie and the vibration differences....

I would think that the gas would be a smoother running engine?
Any input would be great.....

Perhaps any 4-stroke of that size would shake a 26cc plane apart?

The pict may give you a size representation..... About the same size as the giant super sportster.... Just more tail heavy....

(Mind you, the GUy in the pIct isn't me)

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Post #: 189

RE: GAS Saito - 3/6/2008 9:03:02 PM

kochj

Posts: 1503
Joined: 12/5/2005
From: Victoria, MN, USA
Status: offline

THere just has to be more options of airframes to place this engine in other than the H9 1.50 size mustang and Jug???

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