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Extreme Flight 87" Yak 54 - Build & Fly

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Extreme Flight 87" Yak 54 - Build & Fly

Old 04-04-2006, 06:39 AM
  #6876  
flatlandmike
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

That would be kool bigger at same weight is awesome
Old 04-04-2006, 07:35 AM
  #6877  
Bosshossv8
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

ORIGINAL: rdb127

As far as I can remember EF said that the next 50 CC would be bigger than the 87 Yak and weigh around the same. That's gonna be cool in any book.[8D]

I am hoping it is a smoke rumor, to throw us off track of what it really is.

Yeah, what won't fit in one guys car/truck will fit in another, and this one is that , and that one is this....we all want/need different planes.

EF will put out a winner, for sure.

It will be no easy trick to make a better flying plane than the EF 87" Yak-54.
Old 04-04-2006, 07:45 AM
  #6878  
Maudib
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Airwild has a new 50cc 260... 87" at under 16 lbs...



http://www.airwildhobbies.com/MoreIn...&level=2&id=43

Built similar to the EF 87" Yak was as far as phenolic horns, etc... Looks like a nice option.

The new EF plane is sure to be light and an excellent performer and I can't wait til it's announced and then released.

Still if you want something to fly this spring... there are plenty planes to choose from that are available now... like these 260's.

Just make sure to start adding to that RC piggy bank again right away, as when this new EF plane is announced you will NOT want to be at the end of the list.
Old 04-04-2006, 10:35 AM
  #6879  
cadconversions
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly


ORIGINAL: Bosshossv8

... The 260 , I am on board with, but man, NO ONE has a PITTS S-12 in 50cc.

And....Mike Hall is a Pitts S-12 expert. ..........supersize that big one, Mike .

I would find room to store 3 of those....

Sorry, check out flyinggiants for some info on a 50cc Pitts M12 that's coming. Same color scheme as the Goldberg M12 1.2 size. Really awesome looking plane.
Old 04-04-2006, 07:25 PM
  #6880  
edgeman55
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Thats the Aerotec Pitts,they will have more info soon and a Video.They put a DA50 in the prototype.Looks sweet.
Old 04-05-2006, 08:22 AM
  #6881  
Bosshossv8
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Yes, I like it. And one will be here as soon as they arrive. I wanted it to be a Mike Hall designed one, but it looks like it ain't happening here for a while.

Of course, Aerotech says July, things could change by then.
Old 04-05-2006, 08:47 AM
  #6882  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

I have the same thoughts.I will pre order one of the Aerotec pitts for a new DA50 I have coming.As far as end of July that could turn into Sept/Oct as we have all seen this to be the case all to often.If Chris and Mike come up with there own Pitts I will be first in line to get one.Oh well untill then i will just have to be happy flying my good ol Extreme 87" Yak
Old 04-05-2006, 10:02 PM
  #6883  
Bosshossv8
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

ORIGINAL: edgeman55-RCU

I have the same thoughts.I will pre order one of the Aerotec pitts for a new DA50 I have coming.As far as end of July that could turn into Sept/Oct as we have all seen this to be the case all to often.If Chris and Mike come up with there own Pitts I will be first in line to get one.Oh well untill then i will just have to be happy flying my good ol Extreme 87" Yak

My thoughts exactly.



I flew my 87 EF Yak-54 today, and really got aggressive with it. It is fantastic, and only the truly addicted need another plane.

The way this plane does a tumble from nose up hover is just plain insane. Just like or better than the best shockie I have ever flown.

I have one question to those who have logged a lot of gallons on one of these....

Has anyone had a wing-tube split or fray or crack on the ends??

I have a very small mark on the end of my Wing-tube , that looks like it might end up splitting there....I am being paranoid, but it is a deep gouge , about 2cm long and half the thickness of the tube deep.

Eh??


I don't think I will ever be going back to the Extra Pound and half Yaks.


Old 04-05-2006, 10:31 PM
  #6884  
jrjohn
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

How far does the crack go? I'd say a fray or crack at the end means just about nothing, keep an eye on it to see if it start running

John
Old 04-06-2006, 05:59 AM
  #6885  
Maudib
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Yeah I don't think it's anything either... hit it with a dot of CA inside and out and fly...
Old 04-06-2006, 07:44 AM
  #6886  
CHassan
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

You could also stop drill a hole at the end of the gouge, should keep it from splitting to far.
Old 04-21-2006, 12:15 PM
  #6887  
ScaleRules
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Hi guys,

Just going to install my DA 50 and decided to go with a can.

Does anyone know if I use the MTW 75 K can what the drop is on the header. I think I saw somewhere in here that it was a 0" drop. I tried contacting DA but no answer to my emails yet.[][]

My LHS has one in stock with a 1" drop but won't sell the can and header seperately so i need to know if i have to get him to order a new set in.

Thanx in advance for your help.

Here are some shots of my Yak so far.. I got one of the all white ones.

http://i4.photobucket.com/albums/y14...d/P1220336.jpg

http://i4.photobucket.com/albums/y14...d/P1220337.jpg

http://i4.photobucket.com/albums/y14...d/P1220338.jpg

http://i4.photobucket.com/albums/y14...d/P1220340.jpg

Old 04-21-2006, 12:40 PM
  #6888  
coche
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Hi Jim, your yak looks awsome!! nice covering job!!
try calling DA on the phone! they are not good on e mails!! they will take your call and help you right away!
Old 04-25-2006, 07:51 AM
  #6889  
Bosshossv8
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Last couple of pages got toasted in the database crash.


I flew my EF 87 today in Chicago..no wind day, very rare this time of year.

If anyone, including EF can make a better flying plane than this, it must be magic.

I have flown the best I have ever flown , since flying this plane. After flying a 1-1/2 lb heavier Yak on windy days for while and switching to this on calm days, this plane seems like a foamy. It is like a video game with the gravity turned down.
Old 04-25-2006, 11:49 AM
  #6890  
torqmeister
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Amen
Old 04-26-2006, 06:10 PM
  #6891  
SydDythers
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Hey guys,

I haven't posted in this thread for a while since I smacked up my Yak at the end of last season and it has been collecting dust in the corner of my workshop waiting for me to make it a new motor box

My winter build time was consumed by designing a brand new 50CC Yak and I took a lot of inspiration from my beloved EF Yak. I lengthened the fuse about 6 inches, thickened the airfoil just a tad and made the rudder, ailerons and elevators bigger. Oh, and I also added 150 Sq Inches of wing area. All this came out to 16 lbs flat but I am using a set of aluminum gear that weighs nearly a pound more than the EF Yak's composite set. I primarily designed this as a 3D machine rather than a pattern ship.

I had it laser cut since there were so many intricate interlocking pieces, I would have gone insane trying to cut it myself.

I have managed to borrow a few parts from my EF Yak including a spare dinged up canopy (I cut out the wood frame and substituted my own), the cowl and the servo arms. Doing this kept the cost around $350.

Tomorrow is the big day for the maiden and I have my fingers and toes crossed!

Sorry if it sounds like I hijacked the thread...I figured I'd post it here since this airplane is in many ways the offspring of the EF Yak.

If anyone cares to read about the design thread, it is in the Scratch Building forum under "Rollin' my own 50CC Yak 54"

If this design goes well, I will probably scale it to a 40% version just for giggles.

Cheers!

John
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Old 04-26-2006, 09:25 PM
  #6892  
wgeffon
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Looks good John.

Let us know how it flies. Better yet, get some video.
Old 04-27-2006, 04:44 PM
  #6893  
Flyjets
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Hi Guy's

I picked up an Extreme-Flight Yak 87" Model. Funny thing I measured it and it is only 85"s on the Wing Span.

Without reading 276 pages can someone give me the heads up on the following questions.

The Model to me looks short coupled so I am wondering if the small Cannister about 1/2 the pipe tunnel will give me CG troubles?

If that is so am I better off just using the Slimline with the DA 50?

I was planning on the MEJZLIK 23 * 8 what is the Vertical performance like?

The Blue covering is it Ultra Cote or China Cote?

Thanks
Ian
Old 04-27-2006, 05:05 PM
  #6894  
Josey Wales
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Covering is Ultracote

I had a Slimline and it works fine but I switched it for the stock exhaust and I like much better..More power and its lighter..
Old 04-27-2006, 05:07 PM
  #6895  
coche
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

dont worry about de CG, if you use the full lenght pipe you will need to place your RX battery on the engine box, if you use the stock muffler you will need to place the battery just behind the wing tube, the best options for exaust is the stock muffler or the full lenght pipe, the slimline pitts muffler is heavy and you will loose some power
I personaly dont like carbon fiber props, 23 x 8 will be just fine! I am runing 24 x 8 ( dont use this prop unless your engine is well break in) and pulls hard out of the hover!
here is a video of my plane pulling out of a hover..

http://media.putfile.com/EF-87-yak-hover

[8D]

oohh, and the covering its ultracote
Old 04-27-2006, 10:30 PM
  #6896  
torqmeister
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Let's see, you measured wing at 85" & it's 84 " long,-- And you call that short coupled? HUH.
ORIGINAL: Flyjets

Hi Guy's

I picked up an Extreme-Flight Yak 87" Model. Funny thing I measured it and it is only 85"s on the Wing Span.

Without reading 276 pages can someone give me the heads up on the following questions.

The Model to me looks short coupled so I am wondering if the small Cannister about 1/2 the pipe tunnel will give me CG troubles?

If that is so am I better off just using the Slimline with the DA 50?

I was planning on the MEJZLIK 23 * 8 what is the Vertical performance like?

The Blue covering is it Ultra Cote or China Cote?

Thanks
Ian
Old 04-28-2006, 06:16 AM
  #6897  
ScaleRules
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly


ORIGINAL: rdb127


ORIGINAL: JWilliams

My guess on the next plane, 74" yak 54.
Jeff
Second guess though is a Suhkoi with 88-90 inch wing and no bad flight tendencies that will still take a 50cc. Nobody is doing Suhkois any more. Lately its all the Yak craze (started by EF) ánd Extra 260's. My bet is that he will go where no manufactures are going and bring us something very desirable. Come on Chris, my tax refund is on the way....Help me spend it before the wife does!!
I would love to see a Suhkoi SU-29 for 50cc. Thats the twin seat version of the Su-31. Seems a natural since Chris opted for the 2 seat Yak 54 over the single seat Yak 55 last time.

He was showing a 74" Yak 54 at Toledo that was standard Grade A EF quality. Looks to be a good match for the OS 1.60 slimer.
Old 04-28-2006, 06:18 AM
  #6898  
ScaleRules
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly


ORIGINAL: coche

dont worry about de CG, if you use the full lenght pipe you will need to place your RX battery on the engine box, if you use the stock muffler you will need to place the battery just behind the wing tube, the best options for exaust is the stock muffler or the full lenght pipe, the slimline pitts muffler is heavy and you will loose some power
I personaly dont like carbon fiber props, 23 x 8 will be just fine! I am runing 24 x 8 ( dont use this prop unless your engine is well break in) and pulls hard out of the hover!
here is a video of my plane pulling out of a hover..

http://media.putfile.com/EF-87-yak-hover

[8D]

oohh, and the covering its ultracote
So if I opt for the MTW Can setup my batteries should go about where... the fuel tank area?

Who is running this setup? What have you found?

Thanx in advance.[8D]
Old 04-28-2006, 06:23 AM
  #6899  
ScaleRules
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Oh one other question while I am here.

On the 68" Yak it was suggested to glue a support piece behind the plywood tab that the cowl screwed on to. I did and never had any problems with the plywood cracking. Is it necessary to do the same thing for the 87" model?
Old 04-28-2006, 08:12 AM
  #6900  
torqmeister
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

All the covering on the Yak is Ultracote.
The vertical performance is absolutely unlimited. You can do a snap,or double snap, on the upline & it just keeps going vertical. Keep the weight under 16 lbs, preferably between 15 & 15 1/2 lbs. If it gets too heavy with the canister, dump it & go with stock muffler, it's more than you'll ever need.

With the design of this aircraft, it is balanced, it's flies true, it's light on the wing, it goes exactly where you aim it, & it will do anything you are capable of throwing at it. Just wait till you fly it. You will answer me back that I was too conservative with my assessment.

I have a buddy who maidened his yesterday, called me last night at 10:00 pm saying it is the most fantastic flying plane he has ever had.

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