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Old 04-15-2009, 11:05 AM
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Re, the 1.00 and the 1.25 sit in the exact same bolt holes, I have my 1.25 out of its plane right now and could weigh it. The lighter weight is with a TurboHeader mounted.
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Old 04-15-2009, 11:51 AM
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Any problem to mount engine inverted ? I inherited a Saito FA 50 and want to put it in a 40 size pattern ship which is configured for inverted mounting. An experienced flyer at our field advises against inverted mountings due to a tendency to flame out - says go sideways. Comments ?
Old 04-15-2009, 12:30 PM
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The pics on the scale are of the 1.25, correct? What about the length of the 1.25 Hobbsy? The measurement given (119mm or 152mm) is from the drive washer to the rear of the carb. I've got a 1.00 and will check those myself as to not trouble anyone needlessly. Appreciate the help.
Old 04-15-2009, 12:40 PM
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ORIGINAL: reincarnate

The pics on the scale are of the 1.25, correct? What about the length of the 1.25 Hobbsy? The measurement given (119mm or 152mm) is from the drive washer to the rear of the carb. I've got a 1.00 and will check those myself as to not trouble anyone needlessly. Appreciate the help.
Take a look at this web site. It lists dimensions for all (or at least nearly all) Saitos:

http://saito-engines.info/specifications.html
Old 04-15-2009, 02:32 PM
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That's were I got one set of the info Ken. Can I assume then that these numbers are gospel and the numbers listed on HH's site are incorrect? I think that is the case, since I just looked at the 1.80, and it is shown on HH as being shorter than the 1.25 also.

Still would like to make sure, before I make the offer though. Thanks all.
Old 04-15-2009, 04:11 PM
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Don't know why I didn't think to do a forum search on saito + inverted. Found a thread from 2006 with many good comments. Concensus seems to be "no problem".
Bob H
Old 04-15-2009, 04:22 PM
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ORIGINAL: BobHans

Don't know why I didn't think to do a forum search on saito + inverted. Found a thread from 2006 with many good comments. Concensus seems to be "no problem".
Bob H

Bob,

I have 8 Saito's and all but 1 is mounted inverted. I have not had any flame out problems. Make sure it is tuned correctly.

Jim
Old 04-15-2009, 05:00 PM
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I got to put more airtime on my .82 today. It seems to bobble real bad right as it leaves the ground?
Old 04-15-2009, 07:12 PM
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Re, my 1.25 is 120mm from the face of the prop driver to the back of the carb mount bolts.
Old 04-15-2009, 07:16 PM
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Thanks Hobbsy. Appreciate your legwork.
Old 04-15-2009, 09:30 PM
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New question. I am building a 25 year old turn around design called the "Reaction". It should be 9 lbs and calls for an OS 120. As that was 25 years ago, I am wondering if my Saito 115 would produce equal or better power than an old design OS. Any ideas??
Old 04-15-2009, 09:39 PM
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Yes it will perform well
Old 04-16-2009, 08:15 AM
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ORIGINAL: Hobbsy

Dave, I hope you've been flying it for at least 1.5 of those gallons, a Saito can be broken in and set up in about 40 to 50 minutes run time from the initial start up. The LS needle will have a sweet spot that is indeed fairly narrow, it may need tweaked slightly for a different prop since the two needles effect each other somewhat. Other Dave
Yep, I've been flying the heck out of it. Starting to really get dialed in and reliable. The 14x6 prop worked out great. Thanks for the info on the needles. The next new engine I buy I'll use your recommended break in from the earlier post.
Old 04-17-2009, 08:50 AM
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Gidday jim,i must be in the minority slow learners group re your comments about having so many upside down saitos working good right off the bat..
Old 04-17-2009, 05:50 PM
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Hey, fellas,
I recently started running a used FA91s, I acquired.
Before I started trying to adjust the needles it would start and run with ease. But, it seemed to awfully rich, both HSN and LSN.
As I began adjusting them it became harder to start, and now won't start at all. Even, trying to undo adjustments.
The only thing had not checked previously was valve lash. So I pulled the covers and checked. Intake was about .006" and exhaust at .004". I readjusted lash to .002", on both. But, the compression seems to be lacking. No, I don't have the lash adjusted to close. It's a dead-on .002". And, with Bill Robison recommending .0005" I'm sure I'm wider than that.
With the small valve lash, will there be a noticeable decrease in compression?

Thanks,
EJ
Old 04-17-2009, 08:11 PM
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Make sure the throttle is open when checking the compression. If the LS needle is too lean, it renders the high speed ineffective. If you have a metal throttle arm back the LS needle out to even with the end of the throttle barrel. Then start engine with the HS needle at 3 turns out from bottomed out. Then peak HS to absolute peak and leave it there, now start leaning the LS 1/8th turn at a time. Check transition and full throttle operation after every other LS needle change.
Old 04-18-2009, 01:08 PM
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ORIGINAL: Hobbsy

Make sure the throttle is open when checking the compression.
Thanks, Hobbsy. I wasn't aware the throttle position would have an affect on that.

If the LS needle is too lean, it renders the high speed ineffective. If you have a metal throttle arm back the LS needle out to even with the end of the throttle barrel. Then start engine with the HS needle at 3 turns out from bottomed out. Then peak HS to absolute peak and leave it there, now start leaning the LS 1/8th turn at a time. Check transition and full throttle operation after every other LS needle change.
Also, I do have this tuning procedure copied, from earlier in the thread. I thought I was pretty close to being tuned correctly. But, a club member was helping me and said it was still a bit rich on the low side. After we tried adjusting it just once, 1/8 turn lean, it quit and I haven't gotten it started since. Got fuel, I'm pretty sure. Plug seemed OK, but I just put in a new one for good measure. If it stops raining, I'm gonna try it this afternoon.

Thanks, again,

EJ
Old 04-18-2009, 01:47 PM
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Hi guys,
so i was doing the annual on my Sukhoi with a Saito 150 on board and discovered one of my Valve cover screws is missing any idea on the thread diameter and where one might find one.?
it's the older HC Saito 150.

Old 04-18-2009, 03:59 PM
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Here is a guess. The 150FA takes the same screws as the 120FA.. I presume they're the same on the HC (perhaps someone could verify that or correct me).

The Horizon Hobby website has a screw set (sorry, they don't list the actual sizes) here: http://www.horizonhobby.com/Products...dID=SAI120S14A

Hope that this is some sort of help to you,

Bob
Old 04-19-2009, 10:14 AM
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Swixtt- Which Sukhoi are you flying???
Old 04-20-2009, 12:02 AM
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ORIGINAL: blw

Swixtt- Which Sukhoi are you flying???
got the Carl Goldberg kit from years ago ... built it last winter. no longer use that 3 bladed... using a 16x8 now.

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Old 04-20-2009, 09:20 AM
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I bought a used FA 180 that needed the rear bearing replaced (bad rust). I have the old bearings out and will put the new ones in today. My I join THE CLUB even before I run it the first time. This is my first, but not last Saito, and it will go in a GP Giant scale Super Chipmunk.

Thanks for you site and for your consideration on my becoming a member.

Sincerely,

Dick Smith/SPACEWORM/ARCAV8R
Old 04-20-2009, 09:28 AM
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Spaceworm, YOU ARE SAITO CLUB MEMBER 635
Old 04-20-2009, 12:04 PM
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got the Carl Goldberg kit from years ago ... built it last winter. no longer use that 3 bladed... using a 16x8 now.
Why is there so much opposition to the 3-bladed props?

(Except the heavy ones on the PTS planes. That's obvious.)

I would think they could be used to accommodate ground clearance, and still provide a flyable pitch?

EJ
Old 04-20-2009, 12:42 PM
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I acquired a Saito FA150GK a couple of summers ago that has never been run, and I intend to put it on a Seagull Spacewalker II 1.20 at some point......but that's not the question...I just wanted to brag about getting the thing for $135! ;-)

I also have a Saito FA65GK that used to run very well, until it took a dirt nap (no fault of the engine....all pilot error). As a result of the nose first meeting with mother earth, the connecting rods (or at least the tubes that cover them) were bent. I believe the shaft is still in good shape, but I'm not motor repair expert. What should I expect to pay if I send the engine to Horizon for inspection and repair, assuming the damage is limited to this one thing?

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