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  1. #20551
    rowdog_14's Avatar
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    RE: Welcome to Club SAITO !

    Just a FYI. I had a hard time finding more than a few 3 blades post for the saito 100. So here is my findings. I purchased a 13x8 MAS(master air screw) 3 blade and I had it about 1.75 turns out and a little rich. The saito 100 was turning the 13x8 between 8800 and 9100 rpm.

    Saito 100
    MAS 13x8 3 blade 8800-9100 rpm
    Coolpower 15%
    Type F glow
    THE T.R.U.T.H

  2. #20552
    mike early's Avatar
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    RE: Welcome to Club SAITO !

    I use a 13x8 3 blade MA prop on both of my Saito .91s. Favorite prop for that engine.
    Saito Club Member #578
    P-40 Brotherhood #62

  3. #20553

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    RE: Welcome to Club SAITO !

    Anyone dare to guess how much power this exhaust is costing me? This isn't mine, but the exhaust is the same.

    Thanks
    Cory
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  4. #20554
    huck1199's Avatar
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    RE: Welcome to Club SAITO !

    Is a Saito 56 adequate for a .40 sized 72" ws Beaver?

  5. #20555
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    RE: Welcome to Club SAITO !

    ORIGINAL: clytle374
    Anyone dare to guess how much power this exhaust is costing me? This isn't mine, but the exhaust is the same.
    Thanks
    Cory
    4 stroke engines do not behave like 2 stroke engines as to how restrictive the exhaust is.
    What I would suggest is running the engine with and without the exhaust and measure the RPMs and see what it really does.

    with 2 stroke engines I have seen more restrictive exhaust mufflers causing as much as 2,000 RPM drop in performance sometimes more too. But I haven't tried measuring a 4 stroke engine yet to see what happens.


    Club Saito #722, Sig Kadet Brotherhood #80, GlowHead Brotherhood #14,
    AMA # 928076

  6. #20556

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    RE: Welcome to Club SAITO !


    ORIGINAL: earlwb

    4 stroke engines do not behave like 2 stroke engines as to how restrictive the exhaust is.
    What I would suggest is running the engine with and without the exhaust and measure the RPMs and see what it really does.

    with 2 stroke engines I have seen more restrictive exhaust mufflers causing as much as 2,000 RPM drop in performance sometimes more too.* But I haven't tried measuring a 4 stroke engine yet to see what happens.



    Yeah, 2 strokes won't tolerate back pressure since scavenging isn't positive like a 4 stroke. Not to mention how much easier carb tuning is on a 4 stroke. I'm never going back to 2 strokes, in fact I'm waiting for 4 stroke chainsaws.

    I'm kinda tired of working on this plane for now, but sometime I'll take the cowl off and try different setups for comparison.

    Thanks
    Cory

  7. #20557
    Moderator Hobbsy's Avatar
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    RE: Welcome to Club SAITO !

    OK Saito friends, I finally finished a home for my Saito .40a I bought from MM37 about 4 years ago. I tried the little .30 but the plane was way tail heavy. Using the .40a, putting the battery under the tank up against the firewall and using Harry Higley's Spinner nut and lock nut it is perfect. It hangs perfectly level at 3.5" behind the leading edge. Hope you like my, I'll know when it upside down scheme. I could use my old FA .40 but it looks kinda big on there.
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    Farmall 240 the final issue of the Farmall C, Super C, 200, 230 series.
    122 Cu. In. 22 hp. A small tractor that would do big work due to its 10x36 inch rear tires.

    As competition improves products, the differences between them get smaller and smaller

    Club Saito member #5

  8. #20558
    huck1199's Avatar
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    RE: Welcome to Club SAITO !

    Is that a MKII with aelierons?

  9. #20559
    Moderator Hobbsy's Avatar
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    RE: Welcome to Club SAITO !

    Yes sir, Thanks. It also has a bolt on wing using a single bolt, very easy to do

    PS, if it hadn't had ailerons it would have ended up with them anyway, I'm just that way. The entire plane is glued using SuperPhatic from Hobby-Lobby.
    Farmall 240 the final issue of the Farmall C, Super C, 200, 230 series.
    122 Cu. In. 22 hp. A small tractor that would do big work due to its 10x36 inch rear tires.

    As competition improves products, the differences between them get smaller and smaller

    Club Saito member #5

  10. #20560

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    RE: Welcome to Club SAITO !

    Cory,

    Using the 90 degree adapter should not result in a power loss. However, the header pipe should not be threaded in passed the bottom of the female threads in the adapter. Doing so could create a restriction in flow. I have many customers using this arrangement with no power loss.

    Jim
    RC Specialties, LLC, Four Stroke Mufflers and 90 Degree Exhaust Adapters

  11. #20561

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    RE: Welcome to Club SAITO !


    ORIGINAL: RC Specialties

    Cory,

    Using the 90 degree adapter should not result in a power loss. However, the header pipe should not be threaded in passed the bottom of the female threads in the adapter. Doing so could create a restriction in flow. I have many customers using this arrangement with no power loss.

    Jim
    I'm sure I screwed them together as far as I could trying to keep from fracturing or striping the thread. I'll check that right now that I understand exactly what you mean, should of foreseen that myself. My concerns are more with the length and number of restrictions than the 90 itself.

    Thanks
    Cory



  12. #20562

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    RE: Welcome to Club SAITO !

    Cory,

    This arrangement should not cause any problem. As another poster suggested try it both ways. You should be okay.

    Jim
    RC Specialties, LLC, Four Stroke Mufflers and 90 Degree Exhaust Adapters

  13. #20563

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    RE: Welcome to Club SAITO !


    ORIGINAL: RC Specialties

    Cory,

    This arrangement should not cause any problem. As another poster suggested try it both ways. You should be okay.

    Jim
    I had the manifold screwed all the way in creating a large restriction. Not complaining, but might want to put a note in the package. I wasn't complaining about your product, it's much better and lighter than the Saito 90.

    Please don't misunderstand my question. It was merely me wondering if the neat and quite setup was hindering a plane built for power.

    Thanks for the easy and free increase in power.
    Cory


  14. #20564

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    RE: Welcome to Club SAITO !

    Just trying to offer a suggestion. Happy Flying!

    Jim
    RC Specialties, LLC, Four Stroke Mufflers and 90 Degree Exhaust Adapters

  15. #20565
    mike early's Avatar
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    RE: Welcome to Club SAITO !


    ORIGINAL: Hobbsy

    OK Saito friends, I finally finished a home for my Saito .40a I bought from MM37 about 4 years ago.

    Love it. Everyone should have a plane with a Saito .40a.
    Saito Club Member #578
    P-40 Brotherhood #62

  16. #20566
    frets24's Avatar
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    RE: Welcome to Club SAITO !


    ORIGINAL: mike early

    I use a 13x8 3 blade MA prop on both of my Saito .91s. Favorite prop for that engine.
    Mike,

    What RPM's are you getting from that combo? Reason I ask is that I have a used 91 that just got new bearings and a Bowman ring in prep for powering a 72" ws/12lbs warbird and I'm not sure whether or not this is going to be a good choice for this model in the end.
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    "The American taxpayer has always been politicaly deceived. It's their Birthright!"
    Lord Mountjoy, 'The Mouse on the Moon'

  17. #20567

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    RE: Welcome to Club SAITO !


    ORIGINAL: frets24


    ORIGINAL: mike early

    I use a 13x8 3 blade MA prop on both of my Saito .91s. Favorite prop for that engine.
    Mike,

    What RPM's are you getting from that combo? Reason I ask is that I have a used 91 that just got new bearings and a Bowman ring in prep for powering a 72'' ws/12lbs warbird and I'm not sure whether or not this is going to be a good choice for this model in the end.
    Nice plane!! Wouldn't 12 lbs be a little heavy for a 91?
    Content, but not Complacent.

  18. #20568

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    RE: Welcome to Club SAITO !


    ORIGINAL: RC Specialties

    Just trying to offer a suggestion. Happy Flying!

    Jim
    I just tested the engine after fixing the manifold being screwed in too far. I had to do some major retuning. Before for engine peaked at 8400 and backed off to 8100. Now it peaks a touch over 9000 and I backed it off to 8700. I'm guessing 600rpm will be quite noticeable in flight. Isn't a 7% increase in rpm more than 7% in power? Sounds right, but not sure right off hand.

    I'm so happy, I'm sending you a Christmas card this year.

    Cory

  19. #20569
    frets24's Avatar
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    RE: Welcome to Club SAITO !

    ORIGINAL: hsukaria


    ORIGINAL: frets24


    ORIGINAL: mike early

    I use a 13x8 3 blade MA prop on both of my Saito .91s. Favorite prop for that engine.
    Mike,

    What RPM's are you getting from that combo? Reason I ask is that I have a used 91 that just got new bearings and a Bowman ring in prep for powering a 72'' ws/12lbs warbird and I'm not sure whether or not this is going to be a good choice for this model in the end.
    Nice plane!! Wouldn't 12 lbs be a little heavy for a 91?
    Thanks; It's a KI-61 Tony. Started off as an arf but has been stripped down, disassembled, modified and rebuilt....probably would've been a lot easier if done from scratch...if I had access to a canopy it would've been!

    Very abreviated build thread begining at post #22 here. http://www.rcuniverse.com/forum/m_80..._1/key_/tm.htm

    Don't know...I've never really known of a formula for engine to weight ratio, but it would be nice to know as a jumping off point. The plane was supposed to be 60 2c/90 4c and looked a bit over powered in the advert vid. I'm pulling a 8lbs12oz 62'' wing Me109 with a Saito 62 over proped with a 12x8 3 blade and it does pretty well at 7700RPM....was just kind of using that as a basis.

    As always; I'm open to insight, suggestions, experience and commentary The 91 is new to me so I'm not sure as to what to expect from it prop and RPM wise.

    Thanks!!
    "The American taxpayer has always been politicaly deceived. It's their Birthright!"
    Lord Mountjoy, 'The Mouse on the Moon'

  20. #20570
    Old Fart's Avatar
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    RE: Welcome to Club SAITO !

    Thanks frets,everytime i see someone flying a warbird that ain;t a spitty or mustang is good,specially with a fourstroke i fly a midget with a 115
    Watch out for the ground eh?

  21. #20571
    mike early's Avatar
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    RE: Welcome to Club SAITO !

    I will tach the .91 with the MA 13x8 3-blade. I have before but have forgotten. You will love it.
    Saito Club Member #578
    P-40 Brotherhood #62

  22. #20572
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    RE: Welcome to Club SAITO !


    ORIGINAL: mike early

    I will tach the .91 with the MA 13x8 3-blade. I have before but have forgotten. You will love it.

    Thanks, Mike.
    "The American taxpayer has always been politicaly deceived. It's their Birthright!"
    Lord Mountjoy, 'The Mouse on the Moon'

  23. #20573
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    RE: Welcome to Club SAITO !

    Hey guys I have a question.
    I need a new muffler for my 62, 4 stroke, is it 12mm or 13mm?
    Where is the best place to find it?
    Also I am getting a knocking sound from this engine and I am not sure if it has to do with the broken muffler??
    Keep your wings level
    Club Saito Member #693

  24. #20574
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    RE: Welcome to Club SAITO !

    It's a 10mm. See RC Specialties:

    http://rcspecialties.net/products.php?model=TH10X1A

    Nice products.

    Bob
    Bob
    Fleet Brotherhood #1, Club Saito #800

  25. #20575
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    RE: Welcome to Club SAITO !

    I had a pilot error today and killed my low wing aerobatic plane. I needed about 6 more inches of ground clearance and it wasn't there. The wing is about 100 feet back behind, and with assorted parts in between is the horizontal stab. The battery is where I stood to take the pic. The poor Saito .80 looks to have turned out OK though as the plane came in flat with the landing gear taking the hard hit. A good washing and oiling and it'll be as good as new again. But no worries, I have been flying the plane since circa 1991, and I still have two more like it in the shed I can put together. It was a "Split S" too close to the ground that didn't work.



    Club Saito #722, Sig Kadet Brotherhood #80, GlowHead Brotherhood #14,
    AMA # 928076


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