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yellow a4 take off length. - 4/4/2003 5:54:12 AM   
rc.hackmaster



Posts: 125
Joined: 10/30/2002
From: maltby, WA, USA
Status: offline 		got my a4 directions today and they say that the jet will take off in 150'? is that with the scale wings? mine has the sport wings, will it take off sooner? our runway is only 225' long. was hoping to be able to fly it there since my f16 needs way more room than that. this is also the older version that has never been completed. i will be the first to fly her. yehawww. also got a magazine with the dir. april of 89, it has a good article of the yellow a4. thanks any help will be much appreciated. thanks, doug
       Post #: 1

yellow a4 take off length. - 4/4/2003 7:15:53 AM   
Stratotanker



Posts: 622
Joined: 3/1/2002
From: Fairchild AFB, WA, USA
Status: offline 		Hey Doug, I think that your plane will make it off in that distance as long as you keep her light, a good set of firm wheels will also shorten the take off roll, it makes a big difference! Also make sure that the nose is sitting high to help with rotation, will keep it from leaping off the ground. The plane is rather nose heavy at takeoff due to the fuel sitting on top of the nose gear, my A-4 had a CG shift of 7/8'' from a full tank to empty. A big thing to remember is to keep the speed up in the turns and don't pull hard or it will snap out and then you are in for a tumble to its death!

Chris

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yellow a4 take off length. - 4/4/2003 7:37:06 AM   
Daren Savage


 

Posts: 286
Joined: 2/5/2002
From: Los Alamos, NM, USA
Status: offline 		[QUOTE]Originally posted by Stratotanker
The plane is rather nose heavy at takeoff due to the fuel sitting on top of the nose gear, my A-4 had a CG shift of 7/8'' from a full tank to empty.[/QUOTE]Why did you put the fuel tank in the nose rather than using saddle tanks on the CG?

Daren

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       Post #: 3

yellow a4 take off length. - 4/4/2003 7:41:17 AM   
Stratotanker



Posts: 622
Joined: 3/1/2002
From: Fairchild AFB, WA, USA
Status: offline 		There was no room in mine. I think the newer version was able to do this due to the motor being more forward . I had very little experience with this plane so some one may have done it.

Chris

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       Post #: 4

yellow a4 take off length. - 4/4/2003 7:49:47 AM   
Kevin Greene



Posts: 2675
Joined: 3/28/2002
From: Jackson, TN, USA
Status: offline 		The old kits were designed this way and lacked room. The newer redesigned A-4 used saddle tanks. Mine was a blast to fly. Take Chris' advice and you will have a long lasting plane.

Another tip....this model is kinda squirrely on the ground. (At least mine was) On takeoff, advance the throttle slowly to get the model moving straight ahead. Once rolling, nail the throttle and off she goes! If you try to advance the throttle full bore from a dead stop the model will try to swap ends. Was mine the only one that exhibited this behavior???? Once I learned how to manage the takeoff, this wasn't an issue any more.

Kevin

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yellow a4 take off length. - 4/4/2003 5:22:23 PM   
Kevin East


 

Posts: 410
Joined: 10/1/2002
From: Bossier City, LA,
Status: offline 		Hello

Mine hasn't tried to swap ends on take off yet,but make sure to get speed up on take off. It is a blast to fly!

Kevin

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       Post #: 6

yellow a4 take off length. - 4/5/2003 12:00:08 AM   
YellowAircraft



Posts: 3193
Joined: 1/5/2002
From: San Diego, CA, USA
Status: offline 		Kevin,

Interesting that you got yours to do anything at all right at spoolup. Mine wouldn't move until I got up to about half throttle, and I always figured it was due to the small inlets. I never had ground handling issues on takeoff, but I use a little toe-in on the mains. Based on my own experience, I would think you'd need more than 150' for takeoff. Then again, mine have always been laden with extra stuff. The P-80 powered one I'm building now will probably not need a lot of runway for takeoff, though. Hehe.

_____________________________

Yellow Aircraft, JetCat Engines, Skymaster ARF+ and Turn Key Jets
www.cyctheatre.com

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yellow a4 take off length. - 4/5/2003 12:06:53 AM   
SoppyJoe


 

Posts: 272
Joined: 1/21/2002
From: Va Beach, VA, USA
Status: offline 		My bud George DelMoral had the arf A4 w/sport wing, and it would rotate in about 150 ft or so if it had a fair head wind..you may want to give yourself 200ft to be safe.

Joey.

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       Post #: 8

yellow a4 take off length. - 4/5/2003 2:16:16 AM   
Kevin Greene



Posts: 2675
Joined: 3/28/2002
From: Jackson, TN, USA
Status: offline 		Shaun,

Mine had brakes on it----Hold the brakes...Rev it up...Release the brakes....Watch it try to swap ends. We ended up not using the brakes except to stop the model during the taxi, landing, etc...

Don't get me wrong---I LOVED this plane!!! It was my "just throw it in the car and go fly" plane. Very short takeoffs. We lost the model due to interference. This was the older kit. We bought another (New and improved version) and flew the snot out of it until my buddy had a dead stick with it. He tried to stretch the glide---Stall, snap, spin, crash. Just keep the speed up and you'll be fine!

Kevin

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       Post #: 9

yellow a4 take off length. - 4/5/2003 2:39:42 AM   
YellowAircraft



Posts: 3193
Joined: 1/5/2002
From: San Diego, CA, USA
Status: offline 		Yep,

The old 'stretch the glide' trick with the A-4......The stretched glide is the drum roll, and the sudden snap into nose-down inverted is the cymbal clash! Been there--done that. The high-speed stall is something to see also. I learned, don't pull too hard in really high speed turns and don't try to turn corners on landings. Other than that, it's my favorite to fly!

_____________________________

Yellow Aircraft, JetCat Engines, Skymaster ARF+ and Turn Key Jets
www.cyctheatre.com

(in reply to rc.hackmaster)
       Post #: 10

yellow a4 take off length. - 4/5/2003 3:15:44 AM   
Kevin Greene



Posts: 2675
Joined: 3/28/2002
From: Jackson, TN, USA
Status: offline 		Yep, Shaun---these planes are keepers!!! I hate to use the term the "ugly stick of jets" 'cause this plane is not ugly at all. I only experienced a high speed stall one time at the bottom of a loop that was a little tight. Luckily, there was enough altitude to recover. The best thing to do in case of the high speed stall is to just release the sticks. There is usually enough speed for the plane to start flying straight again.....However, the plane could be flying straight but who knows what attitude it will be in!!! The only problem is if you run out of altitude or loose orientation to totally recover.

Are you insane?!?!?! A P-80 in a Heinelman (sp?) Hotrod??? She ought to go like a bat outta you-know-where!!! I hope the wing loading doesn't get too high. You don't have an MW-54 size engine to put in her???

Kevin

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       Post #: 11

yellow a4 take off length. - 4/5/2003 1:00:25 PM   
YellowAircraft



Posts: 3193
Joined: 1/5/2002
From: San Diego, CA, USA
Status: offline 		Kevin



Alas, no smaller engine for the Skyhawk. I'm not too worried, though. I've flown some very heavy ones on fan power, and the P-80 is a very light engine for its size. My only issue was fuel, but I have enough for some short sorties. I modified an F-16 centerline tank to hold 46 ounces, then I've got another 20 ounces on board. At 11 pounds of thrust, that ought to be enough for a 5 minute flight with a go around built in.

_____________________________

Yellow Aircraft, JetCat Engines, Skymaster ARF+ and Turn Key Jets
www.cyctheatre.com

(in reply to rc.hackmaster)
       Post #: 12

yellow a4 take off length. - 4/5/2003 9:53:55 PM   
rc.hackmaster



Posts: 125
Joined: 10/30/2002
From: maltby, WA, USA
Status: offline 		hmmm, just wanted to know if it could take off an a 225' strip. got mor than i asked for. thanks guys.

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       Post #: 13

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