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Extreme Flight 87" Yak 54 - Build & Fly

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Extreme Flight 87" Yak 54 - Build & Fly

Old 05-08-2005, 04:18 PM
  #4751  
going vert
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Got a chance to fly the Yak again this weekend. The pipe / motor combo is doing great. I'm at 7100 on a 22x10. I'm back to square one on the break in after a complete rebuild. I'm still rich on the high end and the motor has unreal power. My guess is I'll be around 7400 after a few gallons. I'll switch to the 24x8 when the motor really comes alive.

The web site will be back up soon....
Old 05-08-2005, 05:14 PM
  #4752  
Josey Wales
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Hey guys which hatch-latch is the one I should get from Hobby Lobby? They show a few different ones..I got an email from Chris that he put on the infamous "list" to get one so Im trying to gather up all the parts Im gonna need..so far

3 x2400 Fromeco relions
DA-50/stock muffler
8611's
SWB arms
Hatch Latch
Old 05-08-2005, 07:41 PM
  #4753  
Maudib
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

This is the one...

HLRE001 Best Hatch Latch ..... $ 4.90

Make sure to remove the top pin (it unscrews out) and place red loctite on it before flying... This will prevent it from working out over time.



ORIGINAL: Jeremiah Johnson

Hey guys which hatch-latch is the one I should get from Hobby Lobby? They show a few different ones..I got an email from Chris that he put on the infamous "list" to get one so Im trying to gather up all the parts Im gonna need..so far

3 x2400 Fromeco relions
DA-50/stock muffler
8611's
SWB arms
Hatch Latch
Old 05-08-2005, 07:44 PM
  #4754  
Josey Wales
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Excellent! Thanks!!! I did read about the loctite in your other post so I was ready for that!!
Old 05-08-2005, 09:20 PM
  #4755  
RPM
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

J. David -

I just returned from attending the May Day Heli-fly in Sulfur, LA and I'm really really glad to hear that you're out of the hospital and getting back to a normal routine.

Perhaps the "Lucky Bamboo" plant that we sent you helped.

Take care and good luck with the maiden.

Larry

ORIGINAL: Maudib


Well guys,

After 7.5 LOOOOOOOOOONG weeks of the hardest thing I've ever had to do, I amgoing home today...it will be several months before I am back to full capacity but God's been good.

I almost died twice, lost 44 lbs (190 now) and haven't had more than a few "good days" since the first two weeks. thanks to all those who well wished and kept contact.... sorry if I missed responding, but your messages were greatly appreciated.

I'm feeling pretty well and have permission to fly as long as I wear a mask to protect from fungal infections..

My Yak (now on REAL topic) is waiting for a couple minor finishes and I'll be able to fly it for the first time...

Haven't been ab'e to wtch this thread, but I hear it's been all over the spectrum. Hope the most of you are enjoying your EF Yak as much as I know I will.

Anywho... take care and see you all more often.

J. David

ORIGINAL: wgeffon

The wires are coated. There is no need to do anything to them at the point where they cross.
Old 05-08-2005, 10:09 PM
  #4756  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Maidened mine today ... got 4 flights. Similar experience as most have had ... awesome! Running DA50 with KS1060 and Mejzlik 23x8. Carbon fiber spinner. Duralites up front and receiver just in front of rudder servo. Balance was fine ... inverted flight was dead level with no down elevator required either way. I have BVM hatch latches on both sides of the canopy and had no problems. Required 3 - 4% rudder to elev mix for mid throttle knife edge flight. Looking forward to more stick time on it!

The Yak related posts on this thread were very helpful in eliminating any surprises. Thanks to all that have contributed!

JS
Old 05-08-2005, 11:18 PM
  #4757  
rmh
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Hatch latch problems?
Idid not care for the buried bolts -so I used long skt head types with sleeves on them
Now the bolts stick out of the fuselage till you tighten them -then go into flush when tight -
loosening them backs em out of th fuselge for easy removal.
Personally, I don't use hatch latches.
had lots of experience with them many types .from DZUS to trigger types
Old 05-09-2005, 12:16 AM
  #4758  
bodywerks
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

I like the quick access - it kept me from needing a seperate switch inline with my smartfly and I don't need ant tools. I have flown mine twice and it hasn't had a problem, but more time will tell.
Old 05-09-2005, 01:17 PM
  #4759  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Dick do you have a picture of your setup for your canopy showing the bolts and the sleeves you are using?

Thanks
Old 05-09-2005, 02:22 PM
  #4760  
flyingcrazy
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Heres how I did my hatch bolts I put small fuel tubing over longer bolts its works great.
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Old 05-09-2005, 03:07 PM
  #4761  
vertical ts
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

What size bolts are they?
Old 05-09-2005, 05:42 PM
  #4762  
fancman
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Just a side note to all the excitement here. A friend of mine just had his DA 50 and firewall part from his YAK while in flight. Needless to say there is not much left of the airplane. Building light is great but at what cost? Watch out!!!
Old 05-09-2005, 05:45 PM
  #4763  
rmh
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Watch out for that builder and that posting.
The kit setup done per the kit is plenty stout
If the builder simply follows instructions -removes covering where slow epoxy is to be used and does not skimp --It is plenty strong .
To be quite frank - I bet I am flogging my setup as hard as anyone-with at least as much power as any other setups and I just checked it from the weekend - mount is solid as a rock.
Posting hearsay info "my friend's plane came apart" is not a good idea .
simply don't give much credit to that type post.
Old 05-09-2005, 06:00 PM
  #4764  
flyingcrazy
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

The front bolts are 1 1/2 the rear ones are 1 1/4 .
ORIGINAL: vertical ts

What size bolts are they?
Old 05-09-2005, 06:12 PM
  #4765  
rmh
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

My hatch bolt setup is very much the same--long bolts -I used telescoping aluminum/brass tubing -(made a thick metal sleeve) -then, put a 1/8" thick piece of small neoprene tubing on the bolt -like a small O ring.
So - you slide em into the fuselage -- and they stop -sticking out a 1/4" or so .
as you tighten the bolt - it stops - flush with fuselage side.
To remove, back out a bolt and it reappears so that you can simply pull it out and the hatch is free to lift off.
Frankly the only part of the kit I did not care for were the buried bolts.
Big deal-----
Old 05-09-2005, 07:39 PM
  #4766  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

I flew mine some more today. I have 20 flights on it. Hatch latch is working out great. Engine has a little over a gallon through it. The DA never misses a beat! Zero flameouts, very smooth transition. Pulls out of a hover no prob. This thing only burns about 8oz of gas in a ten minute flight.

The firewall on mine was coming loose at the bottom after about ten flights. I beefed it up a little and its rock solid now.


How much gas will I have to burn before I can prop up from the 22x10 menz to a 23x8 mej or a 24x8 menz?

That Dick Hanson sounds like he knows a thing or two about this stuff.

Dave
Old 05-09-2005, 07:49 PM
  #4767  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Not here to impune anone Dick. It's just info for builders of this plane. I'm not sure if he followed the steps that you outline but it's just good info to be aware of. When you witness something is it heresay?
Old 05-09-2005, 08:03 PM
  #4768  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

HI all, so where do you buy a Yak 54 , 87'', if it is Extreme Flight I get a answering machine for a week now, maybe you are supposed to order online.
Rcpete
Old 05-09-2005, 08:09 PM
  #4769  
Josey Wales
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Hey..whatsa KAK???

Seriously though I emailed Chris and he got back to me in a few days and said he would add my name to the list when they are available again..
Old 05-09-2005, 08:12 PM
  #4770  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Ok -If you witnessed the firewall coming part - please add info as to exactly what came apart
Otherwise -what would we be looking for?
For example :
did a factory glue joint come apart _if so -it should be part of the engine/firewall assembly which parted the airframe
did wood break ?
did the mount to firewall intersection show strange imprinting -suggesting the engine came loose and the resultant shaking caused the problem?
Obviously, not everyone has experience in accident reconstruction but saying the firewall parted with the engine really does not explain why it parted .
Check into it.
Old 05-09-2005, 08:37 PM
  #4771  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

The firewall is keyed into the sidewalls, and tri-stocked from the factory up front. Even without adding the tristock in the rear, I don' see how the firewall would part. Now, if one were to completely leave the top piece off, or to have a previous wreck unspoken of, then it mak be pissible. Not doing postflights or periodic maintenance could also lead to such disasters.
Old 05-09-2005, 08:40 PM
  #4772  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

There was talk of an EF 87" Yak-54 crashing during a wall...on the 68" thread.

Anyone know of this?? It sounds like it broke up in flight!!?? I don;t believe it.


here is the comment ,



"""
Hey
Yesterday my friends 87"Extreme Yak -54 crashed. The plane broke in two at the point where the cowl meets the canopy. The engine(DA 50) was still attached to the firewall. Both main spars where broken and there didn't seem to be much else holding the plane together at this point. He had just done a maneuver I believe is called a wall when it happened. I am on the list for this model so of course I am concerned. Can anybody give me any info.

Thanks,
Kappy


end qoute""



eh??
Old 05-09-2005, 08:43 PM
  #4773  
jrjohn
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

dave, can you be spacific about where your firewall was coming loose please

John
Old 05-09-2005, 08:47 PM
  #4774  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Mine came lose near the bottom. The plywood delaminated. The rear most ply was still firmly glued to the lower tri stock which was firmly glued as well. But you could flex the motor up and down and watch a "gap" open and close inbetween the plys of the firewall. I glassed it front and back, so far so good.
Old 05-09-2005, 09:11 PM
  #4775  
jrjohn
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Just checked my firewall

, after about 10 flights it's cracked imediatly below the tri-stock on the bottom inside. It's not the glue on the tri-stock that gave out, it's the firewall itself. (too thin) No way will I fly this until fixed. I'm not exactly shure how I'll fix it. Probably have to grind out the tri-stock, reinforce the firewall and add the tri-stock back in. The guy that came foreword with this problem probably saved my plane

thank you

John

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