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    RE: Goldberg YAK 54 - 77" - 12/18/2005 3:20 AM   
    MX240



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    From: PoDunk City, NE, USA
    Status: offline     		Aerobob,
    Geeee, I haven't mounted my stabs yet. Will there be a "surprise waiting for me also??
    I've added some pic's to my profile.
    After going to church tomorrow will try to mount the stabs and see where the ele end up??????????
    Stress!
    Jim

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    RE: Goldberg YAK 54 - 77" - 12/18/2005 6:30 AM   
    MX240



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    From: PoDunk City, NE, USA
    Status: offline     		Aerobob,
    Got home from the office xmas party and went right to the work shop and slid on the two stabs (nice snug fit) and checked with incidence meter and both sides were the same. I then mounted the ele's on robart hinge points and taped the foreward counter balance to front of stab and the ele trailing edges lined up perfectly...so mine is ok
    IF your elevator counter balance's are lined up with the front of the stab and the ele trailing edges DON'T line up I think I would e-mail CG a picture and they can send you one or two new elevators.

    Did you have to mount the receiver battery pack very far back to get the right balance with the B-2.4 engine?
    Jim

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    RE: Goldberg YAK 54 - 77" - 12/18/2005 6:56 AM   
    Bob Pastorello



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    Status: offline     		After gluing them the elevators, I don't know if they'd replace the stab assy's or not, but I will do the counterbalance alignment thing, and shoot a pic from the rear. I don't think anyone would believe it otherwise.

    Sounds like yours are in good shape!

    I have not checked balance yet, but I have already mounted my 2700ma NiMh about 12" aft of the rear edge of the hatch.

    So it's 10 - here's a couple pics.

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    < Message edited by aerobob -- 12/18/2005 7:01 AM >

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    RE: Goldberg YAK 54 - 77" - 12/18/2005 7:17 AM   
    JasonInAugusta


     

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    Status: offline     		I have glued my elevator halves to the H stab and also see what bob pointed out.

    The left elevator is low at the fuse. The inner hinge hole seems a tad off, causing the entire control surface to be a tad out of whack.

    < Message edited by JasonInAugusta -- 12/18/2005 7:18 AM >

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    RE: Goldberg YAK 54 - 77" - 12/18/2005 7:20 AM   
    go vertical


     

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    Status: offline     		i had the same problem with an aeroworks katana they told me they coudn't be responcable for warpage I had to cut the counterballance off and reposhion it after the elv. hafes were lined up never will buy another aeroworks

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    RE: Goldberg YAK 54 - 77" - 12/18/2005 7:21 AM   
    Bob Pastorello



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    Status: offline     		Bummer. Guess the only thing to do is try and fix it with twisting. Not the best solution, but sure beats trying to unhinge and re-attach. Ain't a pattern airplane, after all.... But I do like them to fly as well as we can get them to. Maybe I'll make a call to Goldberg next week, and see if they care.

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    RE: Goldberg YAK 54 - 77" - 12/18/2005 7:34 AM   
    go vertical


     

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    Status: offline     		I hope goldberg gives a darn because the yak in my opinion is a great flying platform I am curently flying a 2.6mt composit arf every thing is perfict there

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    RE: Goldberg YAK 54 - 77" - 12/18/2005 7:41 AM   
    MX240



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    From: PoDunk City, NE, USA
    Status: offline     		Aerobob,
    Thanks for the pic's.
    When I ordered my Brison 2.4 I ordered the other muffler....the $95 one that goes behind. Hope that is the right one???
    Your wooden thread bobbens look good. I have a old pair of alu. standoffs 1 1/4 that I will use.

    Now Bob...after the "bobben hunt please don't make us go into the lingerie part of the store for airplane supplies.

    Jim

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    RE: Goldberg YAK 54 - 77" - 12/19/2005 2:00 AM   
    scalebirdman


     

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    Status: offline     		Just found this thread guys. I picked up my Yak yesterday at the LHS. I have a nearly new Saito 220 which is coming out of my Bandito grande that I blew the wings off on a high speed pass. I have 8 hs545 servos running around, so I plan to use those, at least to start.

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    RE: Goldberg YAK 54 - 77" - 12/19/2005 6:04 AM   
    Balsa Steel


     

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    I went ahead and ordered mine... patience is a Vulture! Not sure what I'm going to hang on the front of it yet, but heap big thanks to you for starting this thread!


    Kenny

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    RE: Goldberg YAK 54 - 77" - 12/19/2005 6:20 AM   
    Bob Pastorello



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    Status: offline     		MX240 - Always be vigilant of the treasures within Wally World - like "velcro", all shapes/sizes, and polyurethane (gorrilla) glue, and hardwood dowels..... and the list goes on. Someday I'll tell about what they sell in that department you named that DOES have a hobby use....

    Anyway - the wrap around Pitts you got will be perfect, will move the air exit aft (good thing), and be more scale than my hacked up install. The 1.25" standoffs will give the clearance you need for the motor box, I think. Post pics when you do yours??

    Mine is finished. Took hours of tweaking/heating/twisting to fix the elevators, but they are. GUYS - double check the hinge alignments before you glue, and also I'd recommend twisting as needed BEFORE gluing.

    Haven't balanced it yet - but with this crazy OK winter wx, we're not in a hurry..... yet....

    Kenny - you won't regret this one, I think.... it's a good arf...

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    RE: Goldberg YAK 54 - 77" - 12/20/2005 5:01 PM   
    e28m5


     

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    Thanks for the drill jig idea, I will use it. Finally started last night, just hinged the ailerons. Question: What are you setting the square perpindicular too? It's clear you are not using the control surface taper. Also, where did you get those cool servo arms and what length are they? Thanks!

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    RE: Goldberg YAK 54 - 77" - 12/20/2005 5:28 PM   
    Bob Pastorello



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    Status: offline     		It is important that the ply plate of the drill jig is an accurate rectangle; the long side must be perpendicular to the hinge line, and it is VERY critical to do that, as should be obvious. It works very well - but must be properly adjusted, and clamped into position. Let me know how yours works for you, please! I may start making these if there is a market.

    The CF servo arms came from Ultra RC, and are "stock" with the Giles. They are 15/16" center to outermost hole. I've asked about them being available as purchase items (because they permit ANY servo's standard round wheel to be the base for installation), and Brian and Ultra RC says he will be able to that (and get longer ones) in the future.

    Looking to maiden mine this Friday; our wx forecast says it could be flyable!!

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    RE: Goldberg YAK 54 - 77" - 12/20/2005 5:45 PM   
    e28m5


     

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    Status: offline     		Thanks - I wasn't clear - I was interested in the vertical alignment - the long wire vs. the square - what surface is the base of the square set on? The servo mount area?

    Good luck w/ the maiden!

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    RE: Goldberg YAK 54 - 77" - 12/20/2005 5:54 PM   
    Bob Pastorello



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    Status: offline     		Oh, sorry, misunderstood the question - I placed the square on the anti-rotation pins on the root rib of the wing. On the stabs, I put the stab tubes in the stab, and rested the square on those. So that establishes the "vertical to wing chord". The "square to servo" is established by setting the jig 90* to the hinge line.

    HTH, thanks.

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    RE: Goldberg YAK 54 - 77" - 12/20/2005 6:19 PM   
    pit_basher


     

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    Status: offline     		Well, put me down for one, let me know price and where to send it. I sure dont have ideas like that


    quote:

    ORIGINAL: aerobob

    It is important that the ply plate of the drill jig is an accurate rectangle; the long side must be perpendicular to the hinge line, and it is VERY critical to do that, as should be obvious. It works very well - but must be properly adjusted, and clamped into position. Let me know how yours works for you, please! I may start making these if there is a market.

    The CF servo arms came from Ultra RC, and are "stock" with the Giles. They are 15/16" center to outermost hole. I've asked about them being available as purchase items (because they permit ANY servo's standard round wheel to be the base for installation), and Brian and Ultra RC says he will be able to that (and get longer ones) in the future.

    Looking to maiden mine this Friday; our wx forecast says it could be flyable!!



    < Message edited by pit_basher -- 12/20/2005 6:20 PM >

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    RE: Goldberg YAK 54 - 77" - 12/20/2005 6:32 PM   
    e28m5


     

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    quote:

    ORIGINAL: aerobob

    I placed the square on the anti-rotation pins on the root rib of the wing. On the stabs, I put the stab tubes in the stab, and rested the square on those. So that establishes the "vertical to wing chord". The "square to servo" is established by setting the jig 90* to the hinge line.

    HTH, thanks.


    Thanks, makes sense. I'll give it a shot.

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    RE: Goldberg YAK 54 - 77" - 12/21/2005 4:23 AM   
    eeyoung


     

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    Status: offline     		Aerobob,
    I'm curious what your final finished weight was. Also how did it balance with your battery back in the fuse?

    < Message edited by eeyoung -- 12/21/2005 4:24 AM >

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    RE: Goldberg YAK 54 - 77" - 12/21/2005 4:28 AM   
    Bob Pastorello



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    Status: offline     		Dunno on BOTH.... but will either do that tonight or tomorrow, as FLYING WX IS COMIN' !!!!!!!!!!!!!!!

    Okay - here's the FINAL "real" RTF weight. For once, UNDER my initial estimate. This is every nut/bolt/fuel line/dot, EVERYTHING needed to FLY.



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    < Message edited by aerobob -- 12/21/2005 5:11 AM >

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    RE: Goldberg YAK 54 - 77" - 12/21/2005 6:02 AM   
    bubbagates



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    Status: offline     		Bob,

    That came out nice. You're gonna be busy when the wx breaks. Maiden the Yak and re-maiden the Ultimate. I forsee lots of teeth showing


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    RE: Goldberg YAK 54 - 77" - 12/21/2005 6:13 AM   
    Bob Pastorello



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    Status: offline     		Thanks, Bill... I am very hopeful of happiness.
    (On the Yak - if I'd done 4 ailerons, it would be a hair over 15 lbs, maybe 15 lb 2 oz)
    We shall see!

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    RE: Goldberg YAK 54 - 77" - 12/21/2005 6:24 AM   
    bubbagates



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    Status: offline     		I would think the Yak at that weight with the 2.4 is gonna be really nice and if the BME on your Ultimate is anything like my 3.2 was on mine...OMG



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    RE: Goldberg YAK 54 - 77" - 12/21/2005 5:12 PM   
    BR289


     

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    Status: offline     		I have the 2.4 FPE on my Extra 260, and although not fully broken in, its not a 3D machine....just not enough power, and this Yak isnt any lighter. I am going to stick the 2.4 out of the Extra 260 on it, and put the FPE 3.2 on the Extra.....Dont know how the FPE and Brissons compare though....

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    RE: Goldberg YAK 54 - 77" - 12/21/2005 6:38 PM   
    scalebirdman


     

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    Status: offline     		Just wanted to point out to everyone the caution on page 4 of the manual: "Before starting, carefully go over all high stress areas with an epoxy or wood glue to confirm all areas are well glued."

    No doubt you have all heard horror stories of arf's coming apart in mid air, traced back to glue joint failure.... Now how do suppose you can get into the wing to glue the spar/rib joints???????

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    RE: Goldberg YAK 54 - 77" - 12/21/2005 7:17 PM   
    go vertical


     

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    what prop are you using on the FPE on gas engines of this class there are big diff. in wood props and how they preform is your plane fast or slow how many RPMs what is your oil mix all is important in this size range the FPE and brison use the same piston cyl. carb combination made by sacks matuka the cranks are the only diff. they do take a long break in and will get stronger the longer they are run the best props that I have found are the mezkic 20x8 or 18x10 the best wood props that come reel close to the carbonprops are NX props sold by air wild I run amsoil at 50 to 1 I have tryed many diff.props by other brands haven't found any that out preform the two i have mentioned

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