Notices
Glow Engines Discuss RC glow engines

Welcome to Club SAITO !

Old 01-29-2008, 08:46 PM
  #9826  
N1EDM
My Feedback: (2)
 
Join Date: Jul 2002
Location: Brockton, MA
Posts: 4,290
Received 7 Likes on 7 Posts
Default RE: Welcome to Club SAITO !

I'd be a little concerned about using all-thread for a prop shaft. Can you find a hardened steel bolt, perhaps at the home center? The carbon steel in that all thread might not be strong enough, and I would be concerned that it could shear....

Just my $.02

Bob
Old 01-29-2008, 08:53 PM
  #9827  
w8ye
My Feedback: (16)
 
w8ye's Avatar
 
Join Date: Dec 2001
Location: Shelby, OH
Posts: 37,576
Received 9 Likes on 9 Posts
Default RE: Welcome to Club SAITO !

I've used 5/16-24 all thread on weed whacker engines for years. Never had a failure

The stud in a K&B 61 is not hard

A hex Socket head bolt is >32Rc
Old 01-29-2008, 10:00 PM
  #9828  
linkadrip
 
linkadrip's Avatar
 
Join Date: Mar 2006
Location: Tehachapi, CA
Posts: 1,442
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Welcome to Club SAITO !

When did Saito Quit including a Velocity stack on there Engines?
I just purchased a FA-62A AAC and it doesnt appear that it has the Velocity stack. The last engine i bought was a .72 GK and it came with a velocity stack. I'm wondering if it is a necessary item to have on the engine?

Thanks
Old 01-29-2008, 10:19 PM
  #9829  
w8ye
My Feedback: (16)
 
w8ye's Avatar
 
Join Date: Dec 2001
Location: Shelby, OH
Posts: 37,576
Received 9 Likes on 9 Posts
Default RE: Welcome to Club SAITO !

The velocity stack is shown in the pictures and included in the parts list of the Golden Knight version
Old 01-29-2008, 11:04 PM
  #9830  
brockettman
 
brockettman's Avatar
 
Join Date: May 2006
Location: Gypsum, CO
Posts: 377
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Welcome to Club SAITO !

I just purchased a 100GK and it didn't come with a velocity stack. I decided to put one on so I'd have something for my Bru Line air cleaner to go over.

After bolting the stack on, I found a gap between the carb and Velocity stack mounting plate. Is this normal or am I missing a gasket or something?
Thanks for the input!

Ben
Attached Thumbnails Click image for larger version

Name:	Mk27029.jpg
Views:	31
Size:	26.6 KB
ID:	865007   Click image for larger version

Name:	Yu63828.jpg
Views:	31
Size:	29.0 KB
ID:	865008  
Old 01-29-2008, 11:11 PM
  #9831  
w8ye
My Feedback: (16)
 
w8ye's Avatar
 
Join Date: Dec 2001
Location: Shelby, OH
Posts: 37,576
Received 9 Likes on 9 Posts
Default RE: Welcome to Club SAITO !

Yes, you have to put an O-ring in there. Take the engine to the hardware store and select one that fits about right.
Old 01-29-2008, 11:16 PM
  #9832  
w8ye
My Feedback: (16)
 
w8ye's Avatar
 
Join Date: Dec 2001
Location: Shelby, OH
Posts: 37,576
Received 9 Likes on 9 Posts
Default RE: Welcome to Club SAITO !

I went and looked at my 62 golden knight and it has the venturi on it with the Oring between the venturi and carburettor

It came that way
Old 01-29-2008, 11:18 PM
  #9833  
brockettman
 
brockettman's Avatar
 
Join Date: May 2006
Location: Gypsum, CO
Posts: 377
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Welcome to Club SAITO !

W8ye,

Thanks, it didn't look quite right....

Ben
Old 01-29-2008, 11:20 PM
  #9834  
brockettman
 
brockettman's Avatar
 
Join Date: May 2006
Location: Gypsum, CO
Posts: 377
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Welcome to Club SAITO !

Alotta good that air cleaner would do with a big ol' gap in there!
Old 01-29-2008, 11:59 PM
  #9835  
linkadrip
 
linkadrip's Avatar
 
Join Date: Mar 2006
Location: Tehachapi, CA
Posts: 1,442
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Welcome to Club SAITO !

[font="Times New Roman"] I'm wondering if it is a necessary item to have on the engine?

Should I purchase A velocity stack for my new engine?
Old 01-30-2008, 12:05 AM
  #9836  
w8ye
My Feedback: (16)
 
w8ye's Avatar
 
Join Date: Dec 2001
Location: Shelby, OH
Posts: 37,576
Received 9 Likes on 9 Posts
Default RE: Welcome to Club SAITO !

the velocity stack doesn't make more power

It helps fuel economy

It helps fuel mess in the engine compartment

the filter keeps dust/sand out of the engine
Old 01-30-2008, 08:49 AM
  #9837  
Capt Lou
Senior Member
 
Join Date: Jan 2007
Location: Waretown, NJ NJ
Posts: 543
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Welcome to Club SAITO !

Link:

You can purchase a velocity stack as a separate part and put it on your carb. I bought and put them on a Saito 100 and 91S and they work fine. You will need to get a small O-ring to place between the stack and carb body to seal the air passage thru the stack. I bought the stack at www.advantagehobby.com and the O-ring at a local plumbing supply store
Old 01-30-2008, 09:06 AM
  #9838  
w8ye
My Feedback: (16)
 
w8ye's Avatar
 
Join Date: Dec 2001
Location: Shelby, OH
Posts: 37,576
Received 9 Likes on 9 Posts
Default RE: Welcome to Club SAITO !

Here's the velocity stack venturi that fits the 50-100 + 125 engines

http://www.horizonhobby.com/Products...odID=SAI50GK93
Old 01-30-2008, 10:07 AM
  #9839  
linkadrip
 
linkadrip's Avatar
 
Join Date: Mar 2006
Location: Tehachapi, CA
Posts: 1,442
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Welcome to Club SAITO !

Great thanks Capt Lou and w8ye
Old 01-30-2008, 06:14 PM
  #9840  
rlmcnii
Senior Member
My Feedback: (3)
 
Join Date: Jul 2005
Location: Pocomoke City, MD
Posts: 525
Likes: 0
Received 2 Likes on 2 Posts
Default RE: Welcome to Club SAITO !

People,
Does anyone here have any first-hand experience with premature connecting rod failures in early Saito 3.00 twins??
I recently acquired a new, but older model, 3.00 twin. Somewhere (RC Report, I think) I read a little side-note about connecting rod problems in these engines. The service people at Horizon tell me they have never heard of this.
Anybody ever experienced this? Thanks.
Old 01-30-2008, 06:17 PM
  #9841  
w8ye
My Feedback: (16)
 
w8ye's Avatar
 
Join Date: Dec 2001
Location: Shelby, OH
Posts: 37,576
Received 9 Likes on 9 Posts
Default RE: Welcome to Club SAITO !

There was some conversation a year ago about the 100T but they have a single throw crank.

The 300 has a double throw crank
Old 01-31-2008, 02:01 PM
  #9842  
Kime
Junior Member
 
Join Date: Jan 2007
Location: Lappeenranta, FINLAND
Posts: 9
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Welcome to Club SAITO !

Hello

I have some problems with the 125 Saito mixtures.
HS needle is 3 1/2 turns out and the LS needle is turned in about 2 turns from the factory set up. Idle is fine about 2000-2200rpm and response is really good.
When it runs at full throttle and rapidly back to idle it allmost dies (it runs very roughly a few seconds) and then get back to normal idle . If the throttle is moved slowly to idle it runs fine.

Is the HS still too rich ?


Old 01-31-2008, 02:11 PM
  #9843  
w8ye
My Feedback: (16)
 
w8ye's Avatar
 
Join Date: Dec 2001
Location: Shelby, OH
Posts: 37,576
Received 9 Likes on 9 Posts
Default RE: Welcome to Club SAITO !

You will need to use the peak rpm and or the pinch test to see where your HS mixture is. But it seems to me that you might possibly be rich.
Old 01-31-2008, 02:22 PM
  #9844  
linkadrip
 
linkadrip's Avatar
 
Join Date: Mar 2006
Location: Tehachapi, CA
Posts: 1,442
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Welcome to Club SAITO !

I read on the saito engine information web site that the saito engine Doenst like to be Throttled Fast.


Information from http://saito-engines.info/special_tricks.html
As the throttle is quickly advanced from low to full throttle lots of air suddenly enters the engine which will cause the engine to quit unless the low-speed mixture is set sufficiently rich. The faster the throttle stick is advanced the greater is the tendency for the engine to quit. Therefore, if the throttle motion is slowed down the low-speed mixture can be leaned further while still preventing the the engine from quitting when the transmitter throttle stick is rapidly advanced. See the ‘Throttle Setup’ section on this web site; it is best to have the leanest possible low-speed needle setting.

The amount the servo is slowed is a personal decision. Just slow it an amount you consider is the slowest you think is reasonable.

The overall result is a very reliable low-speed engine setting. No matter how fast you move the transmitter stick back and forth the engine will not quit.

Of Course only special radios can control Servo Speed.

Kinda sounds like the low speed needle isnt set right i would try to turn it out 1/4 of a turn at a time. my be it is set just a tad to lean. the engine starves for fuel when decreasing the throttle rapidly.

So turning it out a little bit will give it a little more fuel during the quick deceleration IMO

But i'm sure there Are others that will give input but thats what i would try if it were me. You can always put the needle back to were it was before if that doesnt work.
Old 01-31-2008, 02:41 PM
  #9845  
w8ye
My Feedback: (16)
 
w8ye's Avatar
 
Join Date: Dec 2001
Location: Shelby, OH
Posts: 37,576
Received 9 Likes on 9 Posts
Default RE: Welcome to Club SAITO !

Most of the time they work just fine with periodic complete and rapid throttle movement if they are set correctly.

But if you set there and wing the throttle back and forth several times, it is highly likely to quit. Or maybe even backfire and quit.
Old 01-31-2008, 04:50 PM
  #9846  
JDXX
Member
My Feedback: (3)
 
Join Date: Oct 2007
Location: Fort Bragg, CA
Posts: 72
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Welcome to Club SAITO !

Ok guys I've got a 40 sized Edge 540 with a 52 inch wing span advertised flying weight is supposed to be 3.6 lbs.

I am thinking about the Saito 82 for power, but want some opinions.
I want this plane to be fully 3D capable.
Will this engine be appropriate??
I notice the weight will be very comparable with most 46 sized two stokes.

Whaddayouall think??? JDXX
Old 01-31-2008, 05:07 PM
  #9847  
blw
My Feedback: (3)
 
blw's Avatar
 
Join Date: Mar 2004
Location: Opelika, AL
Posts: 9,447
Likes: 0
Received 2 Likes on 2 Posts
Default RE: Welcome to Club SAITO !

One reason is that air will accelerate faster than the fuel, so you get an initial charge of a lean mixture. At least that's what I've read in several places.

A Saito .82 on a 3.6 lb plane? I guess you would have hover power without ever having to worry! That would be 3D capable and then some.
Old 01-31-2008, 05:21 PM
  #9848  
w8ye
My Feedback: (16)
 
w8ye's Avatar
 
Join Date: Dec 2001
Location: Shelby, OH
Posts: 37,576
Received 9 Likes on 9 Posts
Default RE: Welcome to Club SAITO !

There would be a definite ability to pull away if the hover went flat
Old 01-31-2008, 06:11 PM
  #9849  
JDXX
Member
My Feedback: (3)
 
Join Date: Oct 2007
Location: Fort Bragg, CA
Posts: 72
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Welcome to Club SAITO !

I guess what I should have asked is weather to go for one of the smaller saito's.

Though I would like to use the 82 as it will fit for later projects I have in mind...

Thanx, JDXX
Old 01-31-2008, 06:28 PM
  #9850  
w8ye
My Feedback: (16)
 
w8ye's Avatar
 
Join Date: Dec 2001
Location: Shelby, OH
Posts: 37,576
Received 9 Likes on 9 Posts
Default RE: Welcome to Club SAITO !

The 62, 72, 82 all have the smae mounting bolt pattern.

The external physical size of the 72 and 82 are essentially the same.

Thread Tools
Search this Thread

Contact Us - Manage Preferences - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.