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Extreme Flight 87" Yak 54 - Build & Fly

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Extreme Flight 87" Yak 54 - Build & Fly

Old 03-01-2005, 10:35 AM
  #2526  
Richard D Bahmann aka/Wrongway
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Hey Guys,

On the old issue of the Hitec 5995TG, I got my paper out of the box that the servo came in and will quote from it.

" CAUTION: While Hitec's HSR-5995TG Robot servo does offer wider angle of movement than the conventional sevos, close attention should be paid to the width of Pulse variation. Excessive width of pulse variation may lock the gears and cause damage to the servo. Use Hitec HFP-10 servo programmer to limit the angle of the movement to that of a conventional servo if so desired."

Remember that this is the robot servo that has up to 180 degrees of travel.

Also,

"Drop in battery voltage will cause degradation of servo performance. Make sure to use a battery with sufficient current capcity especially when more than one servo is connected and operated from a single power source (battery). Insufficient current capacity will lead to rapid drop in the battery voltage. When using Li-Poly battery, make sure the battery has sufficient maximum curreent discharge rate. Attention should also be paid to the thickness of the wire supplying power to the sevo. Voltage drop will ocurr when the current is increased if the wire supplyin gpower to the servo is too thin. Voltage fluctuation on servo connector can be detected by HFP-10 Digital Programmer."

And finally,

"WARNING: Temporary voltage drop below 4.8V may cause momentary malfunction or erratic behaviour of the servo. Do not touch the servo motor with your hands as it will resume normal operation when the voltage goes back to the normal level."

So, my question is does any of this information help shed light on the previous malfunctions?
They recommend a cable AWG20+ size and a battery current capacity 2400mAh+ with voltage 4.8 to 7.4 Current consumption of 300mA (at 6V no load) and 4.2A (at 6V lock) Were those guys using less wire/battery capacity?

Also, can I limit my servo travel with the computer radio or do I have to go out and buy a servo programmer?

Thanks,

Richard

Doin' all my research early,
My Yak's in the next load.

Don't want it to go squirrly,
Or come down in a road.

Getting on the fast track,
Good info a must.

Best 50cc is the Extreme Yak,
in this you can trust.
Old 03-01-2005, 04:52 PM
  #2527  
lex2bits
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

New DA-50

I'm not sure whether the shortage has eased, but I noticed a new DA-50 in the showcase @ Big Boys Toys here in Albuquerque.
Electronic Ignition
2 1/2" standoffs.
Ser# 1486
$549.95
NOTE: This is an early version, so it will probably need updating by DA.

He also has Slimline Pitts Muffler for it. $99.95

I don't need it, so if anyone is interested, call or email:
Tom Garcia
1-505-298-1023
[email protected]

Store hours (Mountain) 10:00 - 6:00 M-F, 10:00 - 5:00 Sat.

Tom's honest and a really good guy...... he'll treat you right.

Ray
Old 03-01-2005, 04:59 PM
  #2528  
RICK9303
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

I just got a email back from Chris, as to the status of first shipment. It is sold out. The next shipment is due in 2-3 months. He mentioned that he would put me on a list to email . I'm passing this along to anyone who has tried to call or email.
Rick
Old 03-01-2005, 05:19 PM
  #2529  
Maudib
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Hey John,

Sorry to make you wait all day... the docs were having a pokefest..

What you describe probably would be just fine and similar ro what I did. The method AtlantaEFlyer shared a link to is very similar as well. I take it one more anal retentive step...

1) I drilled a hole above the slot using masking tape as a guard. The hole position was selected by sliding the wheel in to where I liked. (I think the stock location is a little too much wheel out of the pant myself.

2) I pushed the axle up against the wheel pant and marked the hex shape onto the pant

3) Using a small ballhead bit on my dremel I ground the material away in the hexhead shape until the axle hexhead is flush with the pant (the picture shows I need a little more depth)

4) I use a doubled 1/8" liteply block with a hole drilled in it for the other side of the pant.

Two screws and blind nuts are used through the gear and into the pant to hold the pant firm. WHat I like about my modified method is that the pant is indexed to the head and you can rotate the axle in the gear until the pant is aligned. I always had a problem getting pants aligned with the fuse and each other and this lets me fine tune it until I am happy. Then they are held in place until I get the retaining screws in place.



ORIGINAL: jrjohn

David, I might as well tell you what I'm thinking (i've done this in the past) Take the wheel axle and grind the corners off the flange nut to make it round. Then drill a hole in the wheel pants the same size as the now round nut. Then I like to make a bearing out of wood and epoxy it to the other side of the wheel pant (inside) And of coarse the two 4-40 screws through the landing gear into the wheel pant to stop it from rotating. "The slit they have in the wheel pant really weakens my set up

John
Old 03-01-2005, 05:31 PM
  #2530  
matus777
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Maudib is that darn Yak of yours forsale yet? If not how soon?
The Thread Group!
Old 03-01-2005, 05:43 PM
  #2531  
Maudib
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly


For sale? Now that's too funny... This one is a conrnerstone of my hangar and won't be for sale as long as I can fly them...

The Thread Group went over my head... ??? [sm=confused.gif]

Typical Ohio weather has me "somewhat" patiently hoping the weather breaks...



ORIGINAL: matus777

Maudib is that darn Yak of yours forsale yet? If not how soon?
The Thread Group!
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Old 03-01-2005, 05:50 PM
  #2532  
rcaviator-RCU
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Pictures of my Yak rack & bag. I know it's kind of boring, but I don't have any pictures of the Yak down on the deck. I wanted to minimize the damage in storage and transportation, also wanted it easy to load and unload as the fuse and wings stay on the rack.
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Old 03-01-2005, 07:35 PM
  #2533  
Maudib
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly


That's a cool setup Don... amazing what some PVC pipe and some ingenuity can come up with...

I reckon a lot of people will be babying their Yaks... me included!
Old 03-01-2005, 08:19 PM
  #2534  
jrjohn
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Thanks for the pics David, I think your idea is the best. You must be using a tiny dentist bit. My fiance is a Dentist and loves grinding with a dremel. I think I'll put her on it.

How do you feel about the two tiny wood screws holding the tail wheel on? did you do anything different.?

As far as the main landing gear, I went with 6-32 hex head bolts instead of the heavier recomended 8-32. I think the tensil strength will be more than adaquate.

still waiting for the hardware package! Dammmmm

John
Old 03-01-2005, 08:21 PM
  #2535  
matus777
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

"The Thread Group! "


I just figured that i'd ask "THE" question for entire group reading this thread....and now we have your final answer? Don't forget now, once flown it's considerd used!
Old 03-01-2005, 08:31 PM
  #2536  
Maudib
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Final answer...

I have carefully devised what I think is the perfect hangar:

87" Yak
Double Vision
Vision 3D
H9 Sukhoi

I have the 37% BME Edge just about ready for maiden too and the Chip Hyde 34% Extra coming.

Don't know if they'll remain a permanent addition or not, but the first 4 alone will keep me happy... and I'll have backups in boxes for all but the Sukhoi

To complete my dream hangar I'm waiting on the 100cc EF Yak... I sure would love to have a very lightweight 100cc size Ultimate... or a Pitts 12 that flew as well as one... but I've heard the Pitt's aren't as clean a flyer as the Ultimates... but if anyone could do a rockin Pitts 12 it'd be Chris!

Now the only fly in the ointment is if my procedure goes South... but then these "built by the late Maudib" planes will go at a premium...


ORIGINAL: matus777

"The Thread Group! "


I just figured that i'd ask "THE" question for entire group reading this thread....and now we have your final answer? Don't forget now, once flown it's considerd used!
Old 03-01-2005, 08:34 PM
  #2537  
Maudib
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

I'm not too worried specifically about the tailwheel mostly because this plane will land featherlight everytime, but the idea of the blindnuts certainly has merit and I'll probably do 4/40's since you can reach in from the access hatch.

The bit I used in the dremel has a head the size of a BB... littel big but worked just fine.

Hmmm a dark Russian dentist beauty... PLEASE don't tell me she cooks awesome too or I'll have to plain not like you no more...


ORIGINAL: jrjohn

Thanks for the pics David, I think your idea is the best. You must be using a tiny dentist bit. My fiance is a Dentist and loves grinding with a dremel. I think I'll put her on it.

How do you feel about the two tiny wood screws holding the tail wheel on? did you do anything different.?

As far as the main landing gear, I went with 6-32 hex head bolts instead of the heavier recomended 8-32. I think the tensil strength will be more than adaquate.

still waiting for the hardware package! Dammmmm

John
Old 03-01-2005, 08:51 PM
  #2538  
litho
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

.
Old 03-01-2005, 08:55 PM
  #2539  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Dave, she doens't cook worth a crap. I think i'll go with the 4-40's and blind nuts on the tail.
Old 03-01-2005, 09:19 PM
  #2540  
cadconversions
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

My first DA came in (2808) yesterday in tip top shape. Looks great. My other DA will arrive this Thursday or Friday via UPS. I'll post it's serial number when it arrives as well.

I'll have a NIB DA-50r for sale next week. Keep an eye out.

J. David, got the tuned pipe. Thanks a bunch. Looks great!
Old 03-01-2005, 09:22 PM
  #2541  
litho
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

.
Old 03-01-2005, 10:44 PM
  #2542  
romanrc
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Litho

Nice trailer, more ideas or other forums for see more trailers, I buy one las week and need work in it.

Thanks
Old 03-01-2005, 11:11 PM
  #2543  
lex2bits
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

deleted[sm=thumbup.gif]
Old 03-01-2005, 11:52 PM
  #2544  
wgeffon
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Here are the Atlanta videos. (well, at least the ones that we can post here )
We didnt get a video of the Advanced or Unlimited sequence with the Yak but we will soon.

http://www.video.shutupandfly.com/Mike68E-Yak.wmv
http://www.video.shutupandfly.com/MattBasic.wmv
http://www.video.shutupandfly.com/DrewSportsman.wmv
http://www.video.shutupandfly.com/DrewIntermediate.wmv
http://www.video.shutupandfly.com/WayneCarden.wmv
http://www.video.shutupandfly.com/JohnExtra.wmv
http://www.video.shutupandfly.com/ScottEdge.wmv
http://www.video.shutupandfly.com/WayneUnlimited.wmv

Old 03-02-2005, 12:00 AM
  #2545  
cadconversions
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Great, looks like I'll be downloading all night!
Old 03-02-2005, 12:12 AM
  #2546  
litho
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

.
Old 03-02-2005, 12:18 AM
  #2547  
lex2bits
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

deleted [sm=thumbup.gif]
Old 03-02-2005, 12:36 AM
  #2548  
lex2bits
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

litho,

I added a note to my original post that it will probably need updating. Thanks for pointing it out and I apologize for the rant.

Ray
Old 03-02-2005, 07:30 AM
  #2549  
rcaviator-RCU
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Litho,
Thats a great looking trailer! From looking at the pictures, you won't have a problem coming up with way to secure the Yak. Looks great what you have done on the inside so far.


What's the deal on the DA50 engines? Has there been a recall? I purchased mine in July of last year, do I need to send it in? It runs great! Excellent power, excellent transition and no problems.

It's hard for me to call DA, but I will try to find the opportunity if the questions are to controversial.

Please fill me in.

B.T.W. I don't do much browsing on this site anymore, so I am not in the know.

Thanks
Old 03-02-2005, 07:49 AM
  #2550  
bodywerks
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

No, no recall, but they are aware of a problem with the engine dying due to sudden stops, such as landing or grabbing the plane to stop it while it is taxiing. Their fix for that is a different pulse pickup location. They also have done an upgrade to the con-rod and rod bearings, as there have been random issues with the previous design. And, from what I gather on the other forums, they had a bad run of cranks where the heat treating wasn't done right and was causing failures. It seems that most of these failures are about a handful out of many,many engines, and DA says the likelyhood of such failures are slim. However, with that said, they STILL recommend sending the engine in for the upgrades, just to be sure...

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