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Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

Old 02-02-2006, 04:39 PM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

Aerobob,

what servo mount are you using on the CG Yak? In or out board? Where is the tailwheel fix?

Mac
Old 02-02-2006, 05:06 PM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

Nobody makes a Jam up 107" Yak to my knowledge. Aviation Models has one that size. Quiques is a bit small for my taste and so is the comp arf 2.6. We need a true 35% size yak from extreme flight, weighing in at under 25lbs.
Old 02-02-2006, 06:00 PM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

On my CG Yak, I'm using the inboard aileron servo location.
Tailwheel here...hope it's self-explanatory.
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Old 02-03-2006, 06:54 AM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

Some new stuff on Great Planes' site.... http://www.greatplanes.com/performan.../gpma1411.html
And I have a thought about the two sets of dual rudder servos..... that is a SHORT fuselage, only 68", so.... to get balancing right and allow gas motors, it must be they intend TWO rudder servos in the TAIL, if gas, and in the FUSE with pull-pull, if Glow....
Anyway - it is definitely the glue in stab like the Ultimate, and it is at a very awkward wing area for a 50cc gasser..... whatcha'all think?
Old 02-03-2006, 08:02 AM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

aero,

Yea, post#41, that wing is too small for a DA50. How do they recommend a Fuji 43?? doesn't it weigh more than a DA50?? Who's got the AUW's on these two? I'm thinking this is a big glow 4 stroker, Saito 220? What if you went OS 160?

So you think the pic of the quad rudder is bogus? Someone must have screwed up that description.... it's not PULL PULL w/ tail servos, it's PUSH PULL, right?

Mac
Old 02-03-2006, 06:08 PM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

I'd put money on the OS 1.60 or Saito 2.20 route for really spirited performance.... probably the OS, use two "push-pull" servos in the tail.... with Saito (heavier), probably pull-pull dual servos in the fuse middle area.... just a guess, but that's how they have the Ultimate layed out.

AFter looking - closely - I'm passing, because I would ONLY use a gasser, and there ain't a gasser light enough until the BME 55 comes out....and then it would be iffy....
Old 02-03-2006, 07:52 PM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

Well, I was thinking about Evolution 45GX before BME 55 surfaced. I am not in a rush either. So in my case, it will most likely be BME 55.
ORIGINAL: aerobob

AFter looking - closely - I'm passing, because I would ONLY use a gasser, and there ain't a gasser light enough until the BME 55 comes out....and then it would be iffy....
Old 02-03-2006, 08:21 PM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

You are gonna get one this year, I'll bet.
Old 02-03-2006, 08:29 PM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

Hajduk, I've got an Extreme 55 on order, I am really looking forward to this engine.

I use the Hitec 5945's & a 5955TG on my EF 87" Yak. I've been very satisfied with their performance. I personally know three people who have experienced lock up on their JR 8611A's. IMHO the Hitec is the better product, my choice, anyway.
Old 02-03-2006, 09:39 PM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

ORIGINAL: aerobob
AFter looking - closely - I'm passing, because I would ONLY use a gasser, and there ain't a gasser light enough until the BME 55 comes out....and then it would be iffy....
Well, if it comes in at 2.1 pounds and there is a 4oz muffler available (snuffs power a bit, but won't matter on a light plane) and the ignition is only 3oz--add 3oz for a 1200mah battery and there is a 3 pound power package. The OS1.6 is 2.5 with muffler and the SA220 is close on take off with a bit larger fuel tank.

If it is what they claim (and they did come thru on the 110) it will open a lot of doors for Gas.[8D]

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Old 02-03-2006, 09:45 PM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine


ORIGINAL: torqmeister

Hajduk, I've got an Extreme 55 on order, I am really looking forward to this engine.

I use the Hitec 5945's & a 5955TG on my EF 87" Yak. I've been very satisfied with their performance. I personally know three people who have experienced lock up on their JR 8611A's. IMHO the Hitec is the better product, my choice, anyway.
H.T. 5945 & 5955TG better than JR8611 ????? [X(][X(][X(]
Old 02-04-2006, 07:35 AM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

I have never run the JR servos (way too pricey for the specs) but I have run both of those hitechs..5945 is a great servo, 5955 is AWESOME. Thats whats going in my OMP Hybrid.
Old 02-04-2006, 07:44 AM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

STG - I agree completely.... the published BME55 specs at this point seem to point to it being a "drop in" on practically ANY "standard" 1.40-1.60 glow airframe with outstanding performance potential, and none of the drawbacks of running glow (higher "wet" takeoff weight", slime, glow plugs, slime, expensive fuel, slime).

It may be what forces me to get the GP Yak....with 8411's and a single 8611 on rudder.... ohhhhhh, baby........... could be a good un.
Old 02-04-2006, 09:58 AM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

I just ordered four HS-5925MG and one HSC-5955 servos. March should be a month to buy GP Yak and end of April BME 55 engine.

I decided to go for 5925 because of the speed. It appeares that these are very fast servos. The torque on them is very similar to Futaba S3305. And S3305 is the servo used on ailerons on that Yak on GreatPlanes web site.

What kind of servo should I get for Throttle?
Old 02-04-2006, 10:26 AM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

ON throttle, DIGITAL is NOT the way to go... QuiQue S. explains well on his website on the 85" Yak manual....so... what I recommend is a fast, coreless, analog servo. You don't need a lot of power, but you need a lot of accuracy and speed, IMO. JR 4131's are good, easy to get used cheaply, not the fastest around.

OTOH - I'm currently "experimenting" with a Bluebird servo (GASP!!!!) on throttle on the Goldberg Yak.... VERY fast, non-coreless, non-digital, but really seems fine so far. Time will tell. I bought this Bluebird 631 standard gears on a whim because of the speed; it is really VERY fast on throttle....
Old 02-09-2006, 12:34 AM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

Manual is out:
http://www.greatplanes.com/manuals/gpma1411-manual.pdf
Old 02-16-2006, 11:11 AM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

I've just placed order for MY GP Yak! With club member discount and additional $30 off, free shipping, I am paying $359.99 for it!
Old 02-20-2006, 10:59 AM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

My YAK just arrived today. Monokote looks great but it hasn't been out in the sun yet.

Planning to use Fuji 43 and Hitec digitals. (because I have all that stuff!)

BTW, unless someone else figured it out, the rudder servos work this way:

2 servos at tail for heavier gas engine

OR

2 servos under canopy if using lighter 2 cycle glow.

Not Both!

I'd plan on a 14 pound plane., but I'll weigh all the parts in the box tonight.

Old 02-20-2006, 08:33 PM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

My Yak is arriving tomorrow. However, I am not planning to fly it until I put my hands on that BME 55cc engine. I also am looking to buy Duralite Flight System Powerbox, because I like the idea of having a redundant battery system.
Old 02-21-2006, 08:38 AM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

UPDATE!! Everything in the box that will fly with the plane weighs 8.99 pounds. I'm not using the 5 ounce plastic engine mount so I didn't add this in.

Also the heavy plywood cowl alignment rings were not included for obvious reasons.

Add your engine weight, servos, batteries and receiver, and there's your anticipated total weight
Old 02-21-2006, 09:00 PM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

I’ve just got mine! Woooou, this Yak looks awesome! I looked, and looked and looked and did not find a single wrinkle! Well, now I am saving money for that BME 55cc …..
Old 02-22-2006, 09:23 PM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

Just picked up my GP Yak at my LHS. Other than a tiny chip on the cowl bottom it looks perfect to me. I don't see a single wrinkle anywhere in the covering. Should have her ready to fly by morning! Well some morning anyway. It is already built so I would call it a simple assembly. I'll try my trusty ST-3250 to begin and go from there. Fancey new gaser right now is out of the question. It is only entertainment you know.

Old 02-22-2006, 09:34 PM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

Don d...
What hobby shop should I visit in Boise area on an upcoming business trip?
Thanks
Barry
Old 02-22-2006, 10:50 PM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine

ORIGINAL: pettit
UPDATE!! Everything in the box that will fly with the plane weighs 8.99 pounds.
I think that puts it at about one pound more than the H9 Extra 260 and about the same weight as the bigger QQ or EF Yak.


Old 02-22-2006, 11:19 PM
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Default RE: Great Planes 25% Yak 81" 12-lb, seen on Fly3D Magazine


ORIGINAL: STG
I think that puts it at about one pound more than the H9 Extra 260 and about the same weight as the bigger QQ or EF Yak.
EF might be lighter, however, it is just not available. QQ 85” Yak weighs 16-17lbs and costs $739.95 (all white is $599.00 ??). My GP Yak ($359.00 delivered) is 81” and will weigh maximum of 15 lbs. I am confused? How’s that the same weight as larger QQ Yak? Unless I got my numbers wrong?

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