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The Cyprus peanut scale twin engine F104

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13 Dec 2018 11:56 #256 by bond007mas
Replied by bond007mas on topic The Cyprus peanut scale twin engine F104
Eric is correct, I had the same problem with the nose wheel on my Concorde. You have to adjust the mounting point that moves the most of the damper. The way i did it was to literally move the retracts up and down adjusting the mounting point each time with small amount, when it works, mark it and fix in position. the other retract will take half the time
It`s trial and error mate, sorry
You could do it the correct way and that is to calculate all angles and movements of all surfaces and work it out that way.
Me and you both know trial and error is the way to go, lol

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13 Dec 2018 19:29 #257 by THE BLACKBIRD
Replied by THE BLACKBIRD on topic The Cyprus peanut scale twin engine F104
I have actually sorted it, got it to work ok, just having to add another ram to each leg to hold the leg straight when it retracts.
With having the joint where the leg pivots it tends to fold when closing
Had to cut a ram in two to get the spring in
Got the new gear doors cast
Thanks: Klipkopwildlife

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13 Dec 2018 21:15 #258 by Eric
Replied by Eric on topic The Cyprus peanut scale twin engine F104
Hooray! :lol: :woohoo:

if you are calm and collected when all about you are going berserk - you've missed something important!

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13 Dec 2018 22:56 #259 by Quorneng
Replied by Quorneng on topic The Cyprus peanut scale twin engine F104
BB
On your test rig you had the suspension leg positioned so it was almost vertical when the U/C was extended. From the pictures I would guess the spring unit would be working at 1:2 disadvantage - the spring would see twice the wheel load.
Now mounted in the fuselage the top of the suspension leg is much closer to the pivot axis so will be working at bigger disadvantage maybe as much 1:4. At this ratio Is the spring (it does look rather small) adequate for the planes likely weight?

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13 Dec 2018 23:09 #260 by THE BLACKBIRD
Replied by THE BLACKBIRD on topic The Cyprus peanut scale twin engine F104
Hi Simon the spring you see in the latest pictures is just for keeping the leg straight when it is retracting because as it retracts it looses the pressure of the main springs, here are two of these 1/2" in diameter each 1" long in the main piston, the two main springs are very strong so I think they will be ok
Time will tell of course
Thanks for asking and keeping me in the right direction as it is all just coming from the top of my head
Thanks: Eric, Quorneng

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16 Dec 2018 19:50 - 17 Dec 2018 09:55 #261 by THE BLACKBIRD
Replied by THE BLACKBIRD on topic The Cyprus peanut scale twin engine F104
Cut the fins off the wing tanks without to much damage, they came in two pieces and sat on the surface of the tanks, very delicate and I could see them getting knocked of so I have cut them into four separate parts and if slotted the tanks so that will make a better job ,

Again pics in the wrong order
Attachments:
Last edit: 17 Dec 2018 09:55 by Klipkopwildlife.
Thanks: Klipkopwildlife, Quorneng

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17 Dec 2018 09:56 #262 by Klipkopwildlife
Replied by Klipkopwildlife on topic The Cyprus peanut scale twin engine F104
Square brackets missing, put back in.

Do it now, you may never get another chance

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