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  1. #1

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    Great planes superskybolt engine question

    Hello All,

    I have a GP super skybolt arf. I am thinking of putting a fore stroke in it. I am looking for some input,

    should I go with the os fs 91

    or a saito 91?

    any help would be great.

    thanks mike


  2. #2
    mirwin's Avatar
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    RE: Great planes superskybolt engine question

    Mike,

    Mine is the kit, which builds heavier than the ARF, and I have an O.S. FS-1.20 Surpass w/Pump in it. I wouldn't consider a smaller engine for the kit. However, a friend of mine bought the ARF, and he put a Saito 1.00 in it which hauls it around fairly well.
    Although the manual calls for a .70 - .91 4-stroke, I think you may be disappointed with the performance. The Skybolt is a super aerobat and you'll want some power to get the most enjoyment out of it.
    Besides, they're very tailheavy. I have nearly 14 ounces of lead forward of the firewall even with the big OS 1.20 and a sub-C NiMH receiver pack immeditely behind the firewall. So you might as well put a slightly heavier engine in it to avoid having to put too much useless lead in the nose.
    I'd go for a 1.00 - 1.20 4-stroke if it was my plane.

    Mike

  3. #3

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    RE: Great planes superskybolt engine question

    Awsome thanks.

    this is my first afr, i have always built kits...i felt weird about buying it.


  4. #4
    Moderator da Rock's Avatar
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    RE: Great planes superskybolt engine question

    Consider adding a layer of decent plywood on the firewall. It is only two layers of LitePly and almost completely unsupported on the top 1/4. Only has the sheeted foam of the fuselage up there.

    It doesn't have to be thick, just thick enough. 1/16" works well.
    Good flying wit ya today

  5. #5

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    RE: Great planes superskybolt engine question

    Great Thanks

  6. #6
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    RE: Great planes superskybolt engine question

    Our field instructor has one with a .91 OS surpass and it looks to fly great,but I've never actually flown it myself. He sure makes it fly nice anyway.

  7. #7

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    RE: Great planes superskybolt engine question

    I have the Skybolt ARF with the OS .91 Surpass on the front and has all the power I want. If I were to do it again I would probably go with the Saito to save a little weight. I balanced my plane according to the manual but it was extremely nose heavy and I eventually removed all the weight I added to the nose.

    It's a great flying plane, in fact my favorite.
    Dry white toast.

  8. #8

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    RE: Great planes superskybolt engine question

    Thanks

    ill probabally go with the saito


  9. #9
    RCPtero's Avatar
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    RE: Great planes superskybolt engine question

    I've got a kit in the box still and have purchased a Saito 1.25 to put in her.


    Tom

  10. #10

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    RE: Great planes superskybolt engine question

    I have the same plane,gp superskybolt arf.I have had one years befors with a ys 110. it flew wonderful and fast. this one has a dle 20 gas engine. with 2 batterys in the nose it is nuteral at cg.this engine is new/3 hrs running time.it will pull 12 lbs thrust with a 15/8 prop 9740 rpm or 12 lbs with a 15/8 vess 8720 rpm. 8lbs 8 oz auw.it flies good.i only fly gas and have 3 other dle engines. the covering on this arf is not the guality i expected from gp. the construction was fine but the covering sucks big time.

  11. #11

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    RE: Great planes superskybolt engine question

    In the kit building forum there is a thread called Show us Your Bolts and you can see a lot of them and see what engines they are using. Just do a search. Some ARFs in the thread too but mostly kits.
    Drinking and driving are illegal, why do bars have parking lots
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  12. #12

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    RE: Great planes superskybolt engine question

    I have an OS 61 SF in my Skybolt ARF and it flies great. For a four stroke the OS 95V four stroke would really go nice in that plane. I have the 95V in a Revolver 70 and GP P-47 and it has lots of pulling power with a APC 14x7 prop.

    Bruce
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  13. #13
    DGrant's Avatar
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    RE: Great planes superskybolt engine question

    Here's an "All things SuperSkyBolt ARF" thread... alot of info here...

    http://www.rcuniverse.com/forum/m_42...tm.htm#4236365

    Read up on it.. its one nice plane. I've got one sittting here waiting to put together. I bought an OS 1.10 for it a while back... put that in another plane and I like it so much in that.. I contemplated buying another 1.10 ... instead bought the OS 95V... and I've yet to run that engine.. but my SkyBolt is getting one or the other... I can't imagine this bipe with anything but a 4-stroke.


  14. #14

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    RE: Great planes superskybolt engine question

    Skybolt arf with a Saito 100 and 14/8 MA prop.
    A picture (video) is worth a thosand words....
    Its a nearly perfect combination, and a really fun plane to fly.
    http://www.youtube.com/watch?v=wk5Ks...&feature=g-upl
    AMA 908262
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  15. #15

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    RE: Great planes superskybolt engine question

    I've got one with a ys 1.10 and its a rocket with that power plant.

    I think any .90 to 120 four stroke makes a good pairing.

    - Joe.
    Joe DeLateur
    Interested in racing in Western US? Go to www.rcpylonracing.com

  16. #16

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    RE: Great planes superskybolt engine question


    ORIGINAL: delateurj

    I've got one with a ys 1.10 and its a rocket with that power plant.

    I think any .90 to 120 four stroke makes a good pairing.

    - Joe.
    That would be my first choice too but I have a couple of them on hand. I would also use one of my OS .91s, I have a couple of them too. At the field the OS .91 seems to be the most popular choices.
    Drinking and driving are illegal, why do bars have parking lots
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  17. #17

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    RE: Great planes superskybolt engine question

    In the ARF I have an OS 61 SF; it is the engine the origianal GP Skybolt was designed for. It provides more than enough power with an APC 12x7 prop and flies it very well including verticle performance.

    Bruce
    Bruce L. AMA# 54227
    Ultra Sport Brotherhood #15


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