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Bungee Cord

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spcialeffects

Joined: 29 Aug 2012
Posts: 306
Location: Kent

Posted: Sat Aug 23, 2014 7:05 am Post subject: Bungee Cord

Hello all. Well i have just installed the bungee to the landing gear frame and the whole thing retracts into the wheel well lovely, however i cant put it back down again using the lever.....its just too stiff. I have to get under the plane and pull the wheel down. Now i noticed on the diagram in chapter 29 the arrows on the bungee. The first two point up and the rest point down. This depends on the way you wrap the bungee around the lower tube (weather in front or behind the tube). Are the arrows wrong? Should it be 2 down and 7 up? Most of the weight (the wheel) is behind the lever so i imagine the bungee is really there to lift the wheel not put it down, is this right? Input to aid my aching hands, from pulling on that cord, is much appreciated. Thanks Frank

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pete(at)lawless.info
Guest

Posted: Sat Aug 23, 2014 7:23 am Post subject: Bungee Cord

Hi Frank



Sounds like you have the bungee set much too tight.  It should not 

require any effort to drop the gear and very little to retract it.



Try loosening it of some until you can easily retract and drop the gear.



Regards



Pete



On 23/08/14 16:05, spcialeffects wrote:

 	  Quote: 	
		   



 Hello all. Well i have just installed the bungee to the landing gear frame and the whole thing retracts into the wheel well lovely, however i cant put it back down again using the lever.....its just too stiff. I have to get under the plane and pull the wheel down. Now i noticed on the diagram in chapter 29 the arrows on the bungee. The first two point up and the rest point down. This depends on the way you wrap the bungee around the lower tube (weather in front or behind the tube). Are the arrows wrong? Should it be 2 down and 7 up? Most of the weight (the wheel) is behind the lever so i imagine the bungee is really there to lift the wheel not put it down, is this right? Input to aid my aching hands, from pulling on that cord, is much appreciated. Thanks Frank





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JonathanMilbank

Joined: 14 Apr 2012
Posts: 395
Location: Aberdeen area

Posted: Sat Aug 23, 2014 4:43 pm Post subject: Re: Bungee Cord

Hi Frank,



I agree that your bungee seems far too tight. In my opinion, the best way to test on the ground after adjusting (loosening in your case) the bungee, is with the wings rigged. Remove the top engine cowling and wrap a lifting strop around the frame behind the engine, then using a crane or block and tackle, raise the aircraft until the mono-wheel is just off the ground. Place padded trestles lightly (not jammed) under the wing tips and climb carefully into the cockpit.



A couple of assistants, one on each side to watch/steady things would be good. They could also simulate air loads by lifting gently on the flap trailing edges when required. IMHO the bungee is set right when the uc/flap lever can "float" approximately in the middle of the gate with air loads.



This amount of bungee tension is just great, as it allows you to vary the drag (a la glider) using flaps during a practiced forced landing as a substitute for glider-type speed brakes. It worked for me!

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spcialeffects

Joined: 29 Aug 2012
Posts: 306
Location: Kent

Posted: Sun Aug 24, 2014 6:12 am Post subject: Re: Bungee Cord

Dont have much time today so decided to have a good clean up and mop in the workshop but before i started i loosened the bungee cord and was able to move the landing gear up and down when standing outside of the plane. For some reason i got it into my head that it had to be tight as hell! Thanks for all input.

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grahamsingleton(at)btinte
Guest

Posted: Sun Aug 24, 2014 8:35 am Post subject: Bungee Cord

Frank

leave a bit of spare on an accessible end so you can adjust it in about 5 years!

Graham





        From: spcialeffects <spcialeffects(at)aol.com>

 To: europa-list(at)matronics.com 

 Sent: Sunday, 24 August 2014, 15:12

 Subject: Re: Bungee Cord

  

 

--> Europa-List message posted by: "spcialeffects" <spcialeffects(at)aol.com (spcialeffects(at)aol.com)>



Dont have much time today so decided to have a good clean up and mop in the workshop but before i started i loosened the bungee cord and was able to move the landing gear up and down when standing outside of the plane. For some reason i got it into my head that it had to be tight as hell! Thanks for all input.





Read this topic online here:



http://forums.matronics.co;  --> http://forums.matronics.com</                     -Mats.com/contribution" =======

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spcialeffects

Joined: 29 Aug 2012
Posts: 306
Location: Kent

Posted: Sun Aug 24, 2014 10:44 am Post subject: Re: Bungee Cord

Ahh the voice of experience Graham, I like it! The problem was, was that the bungee was way too tight. The reason for this is that I was looking at the way the bungee was used on the tri gears before the spring mod and getting confused with the info I was gathering/seeing.

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