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    RE: Goldberg YAK 54 - 77" - 10/23/2006 4:56 AM   
    Kevin23


     

    Posts: 35
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    Joined: 2/1/2003
    Last Login: 12/22/2008
    From: mulberry, FL, USA
    Status: offline     		was hoping to get a gas engine recomendation for this bird.
    I currently have a st3000 in this plane and it has no verticle performance at all,I have tried different props and have decided the engine is not enough power.
    I would like to get some opinions on some gas engines for this yak,I would like to have great verticle performance,with the ability to 3d,I am a newer pilot who is trying to learn the 3d manuevers.

    I would also like to say if at all possible I would like to go with either a fuji,zenoah,or evolution gas engine.
    simply because I work at a hobby shop and can get these engines at a good price.
    Thanks for any help,
    Kevin

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    RE: Goldberg YAK 54 - 77" - 10/23/2006 7:12 AM   
    R/C Foolish



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    Status: offline     		Kevin,

    The Evolution is probably the only gas that might be ok but will not fit in the cowl. I have a Saito 120 in mine and it flies great. The Zenoah 20 will not have enough power and we won't even discuss Fuji's. This plane in my opinion is not built for gas. Your first mistake was to use a ST and a 2 stroke doesn't let you swing a big enough prop. I am using an APC 16x4 W and it will hang on it all day long. Don't they sell 4 stroke in your Hobby shop?

    R/C FOOLISH

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    RE: Goldberg YAK 54 - 77" - 10/23/2006 7:17 AM   
    Kevin23


     

    Posts: 35
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    From: mulberry, FL, USA
    Status: offline     		yeah,we do

    just didn't think a 120 4 stroke would fly it so well.

    I have flown a showtime with a saito 120 in it,and was not impressed with it's performance.

    my showtime has a 120 ax os in it and is night and day better than the showtime with the saito.
    this is just my experience,I am not totally against staying with a glow fuel engine,just want to get it right this time.

    Thank you very much for your experience,i will look into the saito

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    RE: Goldberg YAK 54 - 77" - 10/23/2006 7:18 AM   
    Kevin23


     

    Posts: 35
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    Joined: 2/1/2003
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    From: mulberry, FL, USA
    Status: offline     		btw,the gas engines i was looking at was the bt43,or the g38

    thank you for your help,
    Kevin

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    RE: Goldberg YAK 54 - 77" - 10/23/2006 8:26 AM   
    adrenalnjunky


     

    Posts: 538
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    Last Login: 10/21/2011
    From: West Monroe, LA, USA
    Status: offline     		No offense to Foolish - but I'm not sure why he doesn't think this plane is right for a gasser. It's built solid, has a 77" wingspan, and weighs in the 11.5-14 lb range according to the poster's reports in this thread. Also the cowl is plenty big to fit most of the 40cc class engines with very little extra cutting of the cowling. Making accomodations for protruding spark plugs and side dump exhausts is just one of the things you understand as a nescessary evil when installing a gas engine in any cowled plane.

    Mine has a Brison 2.4 in it, and it fits completely inside the cowl except for the sparkplug boot. That's only because it's a round cowled airframe - if it were the Edge or Extra, you would be cutting out around the cylinder head.

    Even going by the manufacturer's specs of 1139sq in wing area and a weight range between 12 and 14 lbs - the wing loading on this bird is between 24.2 and 28.3 oz/ft. It's not going to be a super light 3d monster. Since I don't fly extreme 3d, I'll have to let others share thier experiences on this plane's capabilities. But, since you say you want a lot of 3d capability, you want to keep it light. Going glow avoids all of the extra battery, switch, etc that a gas engine with EI requires. CDI and magneto gassers are heavier. For maximum glow performance, I would say saito 1.80 or OS FX1.60, Moki 1.80 maybe. All are thirsty engines. Glow fuel is expensive. Gassers have better fuel economy and 93 octane uUnleaded is a lot cheaper than glow fuel. Everything is a tradeoff.

    In the brands you mention - I would love to try putting a Evolution 45 in the bird - it would for-sure pull out with authority. I'm not sure the Evo 35 will have the power you're looking for when you consider the weight increase. The Zenoahs are great, but heavy. G38 would be a possiblity, but at 70ish ounces, it would need a RC Ignitions diet and EI conversion for about $150 (I think) on top of the price of the engine itself.

    Some of the new gas offerings like the Brillelli 40 and 46cc engines would be good for this bird as well, and for a price range between $335 and 400 - can't say they're bad values either - I have their 26cc in another plane and it's a solid performer.


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    RE: Goldberg YAK 54 - 77" - 10/23/2006 12:56 PM   
    R/C Foolish



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    Status: offline     		I stand corrected, Kevin I apologize. Sometimes I should be awake before I answer. I was just answering on the 67" Edge thread. You are right about the Yak. I have a Brison 2.4 on mine and it IS perfect for a gasser. I was thinking about the Goldberg Edge when I answered you. Sorry about the confusion.

    R/C Foolish

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    RE: Goldberg YAK 54 - 77" - 10/23/2006 4:20 PM   
    Kevin23


     

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    From: mulberry, FL, USA
    Status: offline     		thanks,since the 1.60fx was mentioned,I had thought about the bgx-1 3500?
    I know the gas is alot cheaper than the glow fuel to run,I have already run 2 gallons of fuel through this bird in 3 days of flying
    I just want to get it right this time,I had the st3000 given to me,but I had to get a new ring and put a os 7d carb on it.

    Since I am nore familiar with the glow engines I am more comfortable with them,but I am not against using/learning new things

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    RE: Goldberg YAK 54 - 77" - 10/23/2006 4:32 PM   
    R/C Foolish



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    Status: offline     		Kevin,

    Again I apologize for jumping too quickly. Gassers are fun and the Yak is a good choice to put one in. I had the Evolution 35 in mine first and did not like the vertical from it, I now have the Brison 2.4 and it is much better.

    R/C Foolish

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    RE: Goldberg YAK 54 - 77" - 10/23/2006 5:14 PM   
    adrenalnjunky


     

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    From: West Monroe, LA, USA
    Status: offline     		R/C Foolish - just curious - what prop are you running on yours? I'm running a Xoar 20x8 but regrettably only got a 2 minute flight on it before Yak #1 fluttered to death. All I have left to do on the new Yak is balance the prop.

    Kevin - There is no significant difference in the operation of glow vs. gas - tuning the engines is similar, some of the initial setup is important - but gas seems to be more of a set it and forget it deal.

    I've never personally had any dealing with the BGX-3500 - although I can't remember hearing a lot of good things about it on the forums here.

    Also - what props have you tried on the ST 3000?

    < Message edited by adrenalnjunky -- 10/23/2006 5:15 PM >


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    RE: Goldberg YAK 54 - 77" - 10/23/2006 5:35 PM   
    R/C Foolish



    Posts: 1291
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    From: BILLERICA, MA, USA
    Status: offline     		I am using a Mezlik 18x6.

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    RE: Goldberg YAK 54 - 77" - 10/23/2006 10:46 PM   
    adrenalnjunky


     

    Posts: 538
    Score: 100
    Joined: 2/5/2004
    Last Login: 10/21/2011
    From: West Monroe, LA, USA
    Status: offline     		BTW - if any of you have any crashed parts for this plane, I'm looking for a left wing panel/aileron, and the horizontal stab/elevators. Can be in any condition as long as you think it's repairable - I'm willing to do a little work on the parts. I have a project in my head that I'd like to see if I can build.


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    RE: Goldberg YAK 54 - 77" - 10/24/2006 3:18 AM   
    Kevin23


     

    Posts: 35
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    From: mulberry, FL, USA
    Status: offline     		I have tried and 18x6-10 wood,20x6 wood,and a 20x8 apc.

    the 18x6-10 the engine was turning over 8,000 rpm's,the 20x8 was too much for the engine,the 20x6 seemed good for the engine,sounded pretty good and transitioned pretty good.
    but,I have not tach'd it yet with the 20x6 on it

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    RE: Goldberg YAK 54 - 77" - 11/13/2006 9:34 PM   
    HLANG


     

    Posts: 83
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    Last Login: 9/26/2011
    From: RIO DE JANEIRO, BRAZIL
    Status: offline     		Hello Guys.
    After reading this forum I purchased a Brison 2.4 engine to install in my CG Yak54
    I liked very much all advises from Bob Pastorello concerning his setup and best engine for CG Yak54.
    Unfortunately after 3 flights on it, I am very disappointed with this engine.
    I know my engine is still en "break in" process.
    But it seems it's VERY UNDERPOWERED with Brison.
    I am using Zinger Pro 20x8
    80:1 mix ratio oil with gas
    I can read 6600 max rpm in full throttle.
    I tried to put my Yak54 in a vertical clim and it did lacks power to sustain vertical.
    For a 39cc gas engine it's not a bad choice.
    Carl Goldberg suggests a OS 1.60FX engine for this BIG PLANE.
    Bob seems to have a good experience with this engine.
    What's wrong with my engine?
    I can see in this forum some people has the same setup as mine.
    So what is your opinion about this engine and plane!
    Thanks any help.
    Henrique Lang
    Rio de Janeiro, Brazil

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    RE: Goldberg YAK 54 - 77" - 11/13/2006 10:37 PM   
    R/C Foolish



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    Status: offline     		Get rid of the Zinger prop. I am using a Mezlik 18x6 and my vertical is fine.

    R/C Foolish

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    RE: Goldberg YAK 54 - 77" - 11/27/2006 7:02 PM   
    adrenalnjunky


     

    Posts: 538
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    From: West Monroe, LA, USA
    Status: offline     		I finally flew Yak #2 yesterday, and glad to announce no problems like I had before.

    It's an amazingly smooth flying bird. Brison 2.4, Xoar 20x8, Futaba 3305 servos (only 1 per aileron), SWB double lock servo arms, and SWB 4-40 titanium turnbuckles. Engine had just returned from BJ's engine service getting new connecting rod bearings, and a thorough checkout after the crash. I was skittish and didn't really stress the plane too hard on the 2 flights I got on it, but snaps were immediate, especially downline snaps and tumbles. I didn't try any blenders, but I did get that big ole rudder to pull a KE loop, although I chickened out at the bottom and rolled wings level.

    It seems to fly KE better with the right wingtip up than it does with the left - it wants to tuck under with a left wing high KE, but i noticed if I backed the throttle down before rolling into KE, that it was easier to control the tuck.

    Immelmans, split-s, Cuban eights, figure 9's, big ole loops, plane flies very well - I'm happy as can be about the way this one.


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    RE: Goldberg YAK 54 - 77" - 11/27/2006 9:28 PM   
    YakPak


     

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    From: nowhere, ON, CANADA
    Status: offline     		adrenalnjunky,

    Sounds like you got Yak #2 the way you want it, congrats.

    I normally post on the QQ73" thread as I have that plane as well.

    However in terms of my CG 77". I can"t fly until the spring and have installed a Saito 180 on it.

    Has anybody flown with this engine and could you let me know how it performed?

    One of the guys at the club said the engine peforms well if it has a Perry pump and uses 30% heli fuel.

    Thanks
    YakPak

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    RE: Goldberg YAK 54 - 77" - 11/27/2006 9:54 PM   
    adrenalnjunky


     

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    From: West Monroe, LA, USA
    Status: offline     		I can't answer your question about the 180 in that airframe, but all of the bigger saitos I have used were happiest on 30% fuel - flew fine on 20%, but 30 gives them that little something extra - too bad it costs that much extra.

    One of my flying buddies has a 78" H9 Edge 1.20 with the Saito 180, and it flew that airframe very well - I think they are similar in size and intent, and his weighed in the same ballpark as my Yak.


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    RE: Goldberg YAK 54 - 77" - 11/28/2006 6:37 AM   
    mystar46



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    From: Kennett Square, PA, USA
    Status: offline     		I've been flying mine with the Saito 2.20 in it. It was a long break-in period but this thing just has unbelievable power and is now very reliable. I got an MPI on-board glow system and left the tank in the stock location unlike some of the other guys with the same setup that rebuilt their firewalls. I run 12.5% S&W fuel and a 20x6 prop. I did replace the engine mount that came in the kit with a sturdier unit of the same type. My Yak has unlimited vertical and flies like it's on rails. I'm working on a hanger bracket right now to keep the muffler tight. It's just too much weight hanging out there with all the vibration of the engine.
    I'm sure the 1.80 would do a fine job flying this plane too.

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    RE: Goldberg YAK 54 - 77" - 11/28/2006 9:31 PM   
    YakPak


     

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    Status: offline     		Mystar46

    Thanks, that is helpful information.

    What is an MPI on-board system?

    One of the guys at the field had the Saito 180 on his Cap and he felt putting a perry pump on it would help as he had a number of deadsticks on vertical manuvers. Actually that's why he had a Cap!

    Appreciate your comments

    Yak Pak

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    RE: Goldberg YAK 54 - 77" - 11/28/2006 9:45 PM   
    R/C Foolish



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    Status: offline     		MPI on-board system is an on board glow to help keep the glow plug lit at low rpm's.

    R/C Foolish

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    RE: Goldberg YAK 54 - 77" - 11/28/2006 9:53 PM   
    EMVIN


     

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    From: Staten Island , NY, USA
    Status: offline     		YAKPAK, I'm using a Perry Pump on my QQ 73" Yak with a Saito 180 because the fuel tank is set back over the CG. I tryed it without first, and the engine ran very hot. There is approximatly 8" of fuel line between the tank and carb. The pump is probably not necessary with less than 5" of fuel line. I use Morgan Cool Power 30% heli fuel on both my Saito 180 and 220. Its Great! EMVIN

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    RE: Goldberg YAK 54 - 77" - 11/28/2006 10:17 PM   
    YakPak


     

    Posts: 125
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    From: nowhere, ON, CANADA
    Status: offline     		RC foolish

    Thanks , appreciate the post, who sells the MPI system?

    Emvin,

    I also have a QQ73" that I am currently building, thinking of putting a Birelli 40cc on it! Yippee!!


    Yak Pak

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    RE: Goldberg YAK 54 - 77" - 11/28/2006 10:30 PM   
    EMVIN


     

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    Status: offline     		Yak Pak Is the birelli 40cc a gas engine?. That sound like a really good choice for the Goldberg Yak as it is larger than the QQ Yak. My QQ with the saito 180 is ausome and the plane is less than 12lb.

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    RE: Goldberg YAK 54 - 77" - 11/28/2006 10:47 PM   
    mystar46



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    quote:

    Thanks , appreciate the post, who sells the MPI system?


    I researched a lot of on-board glow systems before I bought the MPI. You can order it online at http://www.maxxprod.com/ . I think it was about $60. It's easy to program and it works very well. Your throttle servo will plug in to the glow processor and then the processor plugs into the throttle channel on the receiver. Some other units use 2 channels. If you get the nice MPI one it will use a second channel for manual override if you want it. I don't use it.

    < Message edited by mystar46 -- 11/28/2006 10:48 PM >

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    RE: Goldberg YAK 54 - 77" - 11/28/2006 11:37 PM   
    YakPak


     

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    Status: offline     		Emvin

    Brillelli is a gas engine, it is a new engine and costs around 400.00. They have their own web site, www.brillelli.com.

    Yes, I was thinking about switching my Saito 180 and putting it in my QQ73" and buying the Brillelli 40cc for the CG77".

    Having said that, if you research the Yak 54 QQ 73" thread there is some dialogue about that engine.

    Hope that helps.
    Yak Pak

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