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Crash and burn, yak 54 - 1/11/2008 2:06:17 AM   
SFMMcoasters


 

Posts: 52
Joined: 12/18/2007
From: La Verne, CA, USA
Status: offline 		My brand new baby yak, Spend a week building it, and $200. It flew for 8 seconds total... Turns out the recommended minimum throws were INSANELY responsive. I've never had a 3d plane before, and I was overcorrecting and started to freak out. Darn....

The first picture is 3:44 PM, the next pic is 3:45 PM

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       Post #: 1

RE: Crash and burn, yak 54 - 1/11/2008 2:11:07 AM   
jrwilliams27


 

Posts: 63
Joined: 7/26/2007
From: Ostrander, OH, USA
Status: online 		Sorry to see a nice plane destroyed.

I almost did the same thing on my first 3D plane, and the second flight I learned to use lots of expo! All is good with exponential!

(in reply to SFMMcoasters)
       Post #: 2

RE: Crash and burn, yak 54 - 1/11/2008 2:28:00 AM   
Villa



Posts: 873
Joined: 8/12/2003
From: Wilson, NC,
Status: offline 		Hi SFMMcoasters
That is a nice responsive plane. Do you have much flying experience?

(in reply to jrwilliams27)
       Post #: 3

RE: Crash and burn, yak 54 - 1/11/2008 3:54:55 AM   
fozjared


 

Posts: 544
Joined: 7/1/2007
From: gilmer/nacogdoches, TX, USA
Status: offline 		sorry to see that, i hate it how fast things happen with these planes, one minute you are a proud owner of a beautiful model airplane, the next minute you are a not so proud owner of a wal-mart bag full of balsa scrap wood!

here is what i recommend:

http://texasrcplanes.com/arfyak543dblue.html

i just love mine and have only set dual rates for the elevator and ailerons at 80% throw and high at 125% so it will fly nice and it will fly mean! no expo on mine, i find that expo makes ME jerky instead of the controls! the only thing i set expo on is the rudder, which i rarely use as i have it mixed with my ailerons (also a good idea for starting out on a 3d yak!) my yak that i got at texasrcplanes.com, on low rates, lands like an advanced trainer, just a little warm, not any hot landings! i love the way it flies as well, it flies flat and level at about 1/4 throttle with my os .61 and a 13x6 prop and screams at full throttle! hope you can get this plane and just transfer all the stuff off of that air frame into this one and you will love it!

(in reply to Villa)
       Post #: 4

RE: Crash and burn, yak 54 - 1/11/2008 3:57:28 AM   
NJRCFLYER2


 

Posts: 401
Joined: 7/28/2004
From: Randolph, NJ, USA
Status: offline 		You need to dial in a lot of exponential throw to soften up the response around neutral. Your best bet is to set up dual rates and start out with that until you are comfortable with the airplane. The other thing to do, before you ever fly it, is to adjust the expo so that when you move the sticks off neutral by about the amount you would normally move them for non-3D turns and such, that the movement with 3D throws and normal throws match as closely as possible.

If you do this right, you should be able to fly the airplane all day on 3D rates and never have any twitchiness until you go past the "knee" on the expo curve.

(in reply to SFMMcoasters)
       Post #: 5

RE: Crash and burn, yak 54 - 1/11/2008 4:16:36 AM   
SFMMcoasters


 

Posts: 52
Joined: 12/18/2007
From: La Verne, CA, USA
Status: offline 		Yep, I've got 8 years flying experience. I fly on more weekends than not. What I've been flying lately is my TowerHobbies Uproar, which is a pretty nice aerobat. It can do almost everything but 3d. So I got this yak as my first 3d plane. I had the expo dialed in, but not enough I guess. I thought I had a good idea about how it would react, but I was kinda off. All the nerves built up for the maiden flight really was the icing on the cake, if I had relaxed a little bit more this thing would probably be in one piece. I started to freak out.

(in reply to NJRCFLYER2)
       Post #: 6

RE: Crash and burn, yak 54 - 1/11/2008 5:42:42 AM   
LeeHop



Posts: 216
Joined: 4/5/2005
From: Aurora, OR, USA
Status: online 		SFMM -

I sympathize.

It takes some of the excitement out of a maiden flight, but if you're willing to let a more experienced flyer do it for you they can save the plane by making a few adjustments/suggestions.

As I was freaking out with a maiden flight last summer, a very good pilot came running out of the pits saying Hold it Hold it Keep it going - until he could take the transmitter from my hands. He then landed, adjusted dual rates & expo and handed me back a plane I could fly

(in reply to SFMMcoasters)
       Post #: 7

RE: Crash and burn, yak 54 - 1/11/2008 6:10:48 AM   
nitro wing


 

Posts: 2338
Joined: 9/29/2003
From: surrey, BC, CANADA
Status: offline 		I would guess there was something else going on,like a bad CG or malfunction.
If you have flown a fair bit and can do areobatics,you should have handled this one easily.
Just because a plane is labeled as 3D does not make it (usually)a monster to fly.
Of course if you had 40 degree throws and no expo,it would be tough.
I am asuming you probably had about 30 degrees throw and 20% expo?
Generally I have 30-60% expo if I get max throws.Its especially pronounced on the elevator.
Any chance you can see what the set up was?
Its easy to panic,and at a 100 feet off the ground they seem to go in as fast as lightning.
Hope the next one goes better,go online to verify your final set up if unsure ,or have someone who is comfortable with flying
untamed planes, do the maiden.

(in reply to LeeHop)
       Post #: 8

RE: Crash and burn, yak 54 - 1/11/2008 6:13:25 AM   
nitro wing


 

Posts: 2338
Joined: 9/29/2003
From: surrey, BC, CANADA
Status: offline 		Just looked at the pic again.
Its unusual that both elevators are seperated from the stab

(in reply to nitro wing)
       Post #: 9

RE: Crash and burn, yak 54 - 1/11/2008 6:35:50 AM   
SFMMcoasters


 

Posts: 52
Joined: 12/18/2007
From: La Verne, CA, USA
Status: offline 		Thanks for the input guys. Yea I've been looking for other types of problems, I thought I could handle it too...

(in reply to nitro wing)
       Post #: 10

RE: Crash and burn, yak 54 - 1/11/2008 7:18:43 AM   
aussiesteve


 

Posts: 1072
Joined: 10/12/2005
From: TEDA (Tianjin)Tianjin, CHINA
Status: online 		What exactly did it do when it went wild?

Was it to do with rolling by any chance?

I remember the very first (and thankfully only) time that I lost one on a maiden. It went absolutely beserk in the air as soon as it lifted off. It was a similar plane to yours. I had 2 problems built in
1st - I had reversed ailerons - I picked that up and left them alone.
2nd - I had just switched to a HiTec radio (from a JR) - I had +60% expo dialled in - It should have been Minus 60%. - made it kind of incredibly twitchy.

The only other one we have lost on a Maiden was a "Street Machine". I built it a bit too heavy and had the lateral balance all wrong - My son took off (I could see it happening when it was still on the ground but never had time to get him to stop) - it got airborne for about 20 feet then speared in and snapped in half. That was a building problem on my behalf due to it being overweight and out of balance (laterally).

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RCGF engines & Boxes, 33RC airframes, Tzone models, Super Kraft (SK) & others

(in reply to SFMMcoasters)
       Post #: 11

RE: Crash and burn, yak 54 - 1/11/2008 12:59:10 PM   
RC MANIAC119


 

Posts: 571
Joined: 11/3/2003
From: muskegon, MI, USA
Status: offline 		I have to agree with NitroWing....if you've been flying an UpRoar for 8 years, there is absolutely no reason why you could not have handled this bird!! If you followed the factory's recommendations on set-up.............I think you should look elsewhere for an explaination.....and I would start at those elevator hinges!

It looks like they did not get any glue

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RC MANIAC-PRO BRO 1900-AMA# 95841

(in reply to aussiesteve)
       Post #: 12

RE: Crash and burn, yak 54 - 1/11/2008 2:42:08 PM   
hdwideglide03



Posts: 459
Joined: 1/5/2007
From: Hamilton, OH, USA
Status: offline
quote:

ORIGINAL: LeeHop

SFMM -

I sympathize.

It takes some of the excitement out of a maiden flight, but if you're willing to let a more experienced flyer do it for you they can save the plane by making a few adjustments/suggestions.

As I was freaking out with a maiden flight last summer, a very good pilot came running out of the pits saying Hold it Hold it Keep it going - until he could take the transmitter from my hands. He then landed, adjusted dual rates & expo and handed me back a plane I could fly


LEEHOP, I don't think you could be anymore right than that. We have a gentleman at our airfield that has been flying in the RC world for many of years. His advice and experience is just absolutely priceless to the club and airfield. He is at the field M - F from 12 until 5 religiously. Everybody who had just built a plane or put together an ARF comes out during that time to have him to check the plane over and to take it up for its maiden. He gives the transmitter back and you have a plane in the air you can handle. Which is a great feeling.

Also sorry about the loss SFMM2


_____________________________

You don''t stop playing because you get old. You get old because you stop playing.

(in reply to LeeHop)
       Post #: 13

RE: Crash and burn, yak 54 - 1/11/2008 4:27:29 PM   
Villa



Posts: 873
Joined: 8/12/2003
From: Wilson, NC,
Status: offline 		Hi SFMMcoasters
With your 8 years of experience you know it is always good to learn something from every crash. When you get in trouble throttle back; it gives you more time to calm down and get control. That is such a simple thing that it still amazes me that after 35 years in this wonderful hobby I occasionally forget this.

(in reply to hdwideglide03)
       Post #: 14

RE: Crash and burn, yak 54 - 1/11/2008 7:16:54 PM   
outdoorhunting


 

Posts: 489
Joined: 9/22/2006
From: Kokomo, IN, USA
Status: offline 		Same thing happened to me. A brand new Twist 40. I got it up 2 mistakes high & thought, man this is easy. I think I'll do a roll. That little sucker when into a hyper- drive roll , only one other guy was at the field & he has less flytime than me told me later that I said ,Oh,%$%#$ & corrected the other way. That did it, it was spinning a gazillion miles an hour. Long story short, I should've been about 30 mistakes high!!! He said I stood there with my mouth wide open watching the thing go into the ground. Later 1 of the experienced guys asled why didn't I set my radio so the controls traveled at say, 40%. I didn't know how. He said-- Here's your sign !!!

(in reply to SFMMcoasters)
       Post #: 15