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Extreme Flight 87" Yak 54 - Build & Fly

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Extreme Flight 87" Yak 54 - Build & Fly

Old 04-24-2005, 03:11 PM
  #4426  
BBriBro
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly


ORIGINAL: flatlandmike

work for the local hobby shop buy a piece at at a time save up enough for a DA50 then save up for the air frame...
I hate to stir the sensitive and loyal DA "pot" but if money is an issue, I don't think I would recommend the most expensive engine, and maybe buy the engine last, how many of you bought a DA-50 just for this airplane, and then by the time your airplane was here, your brand new engine was already "outdated" and several "mods" behind the current versions! ? Save the money, have your parents invest it or something (or just hide it from you) and then buy it all at once, and get the latest and greatest of everything (within reason)
Old 04-24-2005, 03:57 PM
  #4427  
flatlandmike
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

BbriBro i wish i had the self control to save the money for the all at once buy option but i am weak and i don't fully agree with you conclusions of DA50R but thats kool too i can see where your commin from

ps: i suggested the DA50r buy first because it can always be sold with almost no lose if your mind gets changed
Old 04-24-2005, 05:48 PM
  #4428  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

What are some of the finished weights with the pipe? Mine is looking to be around 16lb. 2oz with the pipe and appears it may be tailheavy or close to it with the CG at the rear location.
Old 04-24-2005, 06:49 PM
  #4429  
rmh
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

I took a few liberties with my Yak---
The reason being that I need to 13% (at least )lighter than a sea level setup -just to be in same ball park .
At 4350 ft--- you give up lift AND power .
So I swapped out wheels and landing gear and eliminated wheelpants.
Also went to lighter tailwheel and eliminated both rear elevator servos -
The single elevator servo sets just aft the rudder servo -and is run by a CF pushrod with ball ends to a elevator horn -sorta like a controline setup but removeable and far more sturdy .
This chops about 6 oz from the stabilizers - plus eliminates the big servo/extension leads etc..
I don't recommend this unless you have some time in grade at making this type stuff.
All up weight looks to be 15 lbs or therabouts -will have precise weightthis week.
The ZDZNG50 has a J shaped header and full length is a AMT 50 , which weighs 10 ounces.
Prop is a JAS23x8-which turns in low 7000 rpm range.
The model is very nice -mine is a basic white -with a scale green/orange /white scheme and a heavily smoked canopy .
also a scale shaped main and tail gear -just for the helluva it
Also the prop is way ahead of the cowl, per scale setup.
servos - 8611 for rudd+elev- 8411's for wings .
I will stick a couple of pictures here as soon a it is finished -should be this week.
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Old 04-24-2005, 06:52 PM
  #4430  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Dick, are you going to get rid of the landing gear and wheel pants? I need both, as I busted a wheel pant and I also busted the landing gear when drilling them.

Thanks
Jon

email me at [email protected]
Old 04-24-2005, 06:59 PM
  #4431  
bodywerks
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

what are the alternate gear you are using? I busted mine and I would like to go CF, but I haven't found anything very close.
Old 04-24-2005, 07:04 PM
  #4432  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

www.graphtechrc.com is working on CF gear, as I have also inquired. He said that as soon as he had them made that he would list them on the site. I haven't seen them yet, but I am awaiting them also.

Jon
Old 04-24-2005, 07:13 PM
  #4433  
rmh
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Iwill sell both the gear and pants -neither has even been mounted
Just find out what Chris gets for them -That price is fine with me .
My gear is a few ounces lighter from hard aluminum - I made the gear/tailwheel and elevator horn myself -
E-Mail me privately or post privae message here .
Old 04-24-2005, 07:17 PM
  #4434  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

I have no idea what he sells them for? Shoot me a price. Bodyworks may need them worse than me, as mine are still functional, but busted.

Jon
Old 04-24-2005, 07:49 PM
  #4435  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

I want a yak!!
Old 04-24-2005, 07:54 PM
  #4436  
bodywerks
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

They seemed to break too easily, IMO. My landing wasn't hard, maybe just a little sideways from the crosswind. I was shocked when the gear just snapped, so I am trying to get anything close in CF, but I will get a stock gear from Chris if I cannot find anything.
Old 04-24-2005, 08:06 PM
  #4437  
going vert
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

ORIGINAL: bodyworks

Maiden flight today...had mild gusty winds and a storm a brewin', but the winds were not as heavy as yesterday. I couldn't wait any longer so I headed out. Takeoff was uneventful and I could tell right away that it was a KITE! Once in the air the winds were so choppy that trimming was out of the question, so I just got it as good as I could and started flying. I am going to have some serious fun with this plane once I get the engine broken in and some bugs worked out.
The only real bug I encountered was the engine tending to want to die when pulling level from a downline...I seem to remember some talk about this, but don't remember the cause or cure - can anyone help me out????????????
Anyway, I decided to bring her in and had a pretty decent crosswind. Instead of trying to crab it, I cam in at an angle (directly into the wind) until just before touchdown. So I pointed it down the runway and touched down. I don't know what happened, but the right gear leg folded back, causing me to bust my prop and scrape the right wing. It must have been a fluke or I struck something on the runway or something cuz the landing wasn't that bad...oh well - a new prop, gear, and some covering and I'll be back in the air. I can't wait for some perfect weather to get this thing set up, cuz it's gonna be an awesome flyer!
BTW, with the DA muffler, and my RX battery already hanging off the front of the engine box it still flies tailheavy - not by feel, but by observing knife edge. My only option may be (nasty word) lead!
I agree w/ Mantus - wait for the lead. Fly it some more and get the feel for it. I'm running the KS 1060 pipe w/out lead up front. I think you'll agree after you get more stick time. Also, roll to inverted to check the CG in flight - Not sure what KE will tell you about CG. Wayne is running your exact setup w/ RX battery on the wing tube and his CG is perfect w/out lead.

Old 04-24-2005, 08:18 PM
  #4438  
matus777
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Drew, at Larry's i thought i was a bit tail heavy because when i went inverted the YAK climbed...otherwise it felt pretty good. It was not until i got to fly it in a bit less wind that i discovered it only needed one click of up trim.....fixed my inverted climb condition....duh!
Old 04-24-2005, 08:48 PM
  #4439  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Drew, what does your Yak weigh?
Old 04-24-2005, 08:55 PM
  #4440  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

ORIGINAL: Ontariomystic

Drew, what does your Yak weigh?
Right around 16.4# dry. We weighed it months ago.
Old 04-25-2005, 06:45 AM
  #4441  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly


ORIGINAL: BARCC

I want a yak!!
he he
Old 04-25-2005, 10:11 AM
  #4442  
Mike Parsons
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

I hope to have the video tonight of the E-Yak flight. Here is some eye candy as an appetizer.

My AUW Electric came to 14 pnds. 12 oz. It is extremely light on the wings. Very cool to have it this light, but Chris said he was having to power through the waterfalls as their wasnt enough weight to carry it around . At 15.5 pounds, this plane lands like a trainer. At 14 and some change it is just sick.

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Old 04-25-2005, 10:12 AM
  #4443  
Mike Parsons
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Two more
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Old 04-25-2005, 10:25 AM
  #4444  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

I spoke with Caroline from Carden and she is going to make a cover specifically for the 87" Yak.
These things are made of stretchy material and do wonders for protecting the plane from the sun.

I dont know how much yet but I will post back after I get mine with how much I paid.

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Old 04-25-2005, 11:15 AM
  #4445  
rmh
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

here is a header setup I made this morning -couldn't wait on the store bought one -
On the AMT tuned pipe I am using I run from 7150 to 7750 rpm on 23x8 to -22-8 props .
kinda overkill but should be a blast.

We start paint tomorrow
Me and my spray bombs---
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Old 04-25-2005, 11:17 AM
  #4446  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Man at that projected weight it should be awsome.
Old 04-25-2005, 11:35 AM
  #4447  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Dick,

are you planning on doing anything about protecting the servos from the heat rising from the header?
I'm not even sure you need to do anything but I didn't like mine being so close to the header.
So I wrap it up with some insulation.... the bottom part of it.

What are your thoughts on this?

Thanks,

Stratos.-
Old 04-25-2005, 12:02 PM
  #4448  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Wayne,

That sun cover from Carden is great. I use it on my 33% and 42%. It is not cheap. but it works very well to protect against "sun blisters" [8D]. I will get one when I receive my Yak
Old 04-25-2005, 12:02 PM
  #4449  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

I did the same with an aircraft grade red silicone foam tape. Don't think it really needs it, but the piece of mind helped.
Old 04-25-2005, 01:25 PM
  #4450  
cadconversions
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Dick, how far did you pull the motor out past stock for the more scale look? Might be the best option for the KS1060 pipe instead of mounting everything on the motor box.

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