landing gear pins

[cloudfreak1]

hi,

can someone explain to me exactly how the landing gear pins prevent the landing gear from unlocking on the ground

thanks in advance

[Ben Russell]

46 minutes ago, cloudfreak1 said:

hi,

can someone explain to me exactly how the landing gear pins prevent the landing gear from unlocking on the ground

thanks in advance

Does this help?

 

[cloudfreak1]

i have seen this video already, but i don't understand what the gaerdownlock-pin exactly does

[Ben Russell]

3 minutes ago, cloudfreak1 said:

i have seen this video already, but i don't understand what the gaerdownlock-pin exactly does

 

Red line indicates probable path / location of gear pin. It stops the mechanical lock out from being able to unlatch.

 

[Ben Russell]

The latch / lockout mechanism is just a series of cleverly designed levers and the pin is an additional fool proof layer on top of everything else.

Temperature fluctuation in hydraulic lines could change pressurization levels which can change actuator positions.

Placing a pin through the holes means any possible variation in the hydraulic system is nullified. The lockout levers/latches cannot change position unexpectedly.

 

* Not a certified mechanic. Am mechanically capable and have fixed many things over the years including hydraulic systems, lines, actuators and pumps.

 

[Ben Russell]

[cloudfreak1]

thank you very much for the detailed explanation
The picture above is self-explanatory but I can't quite see it on the CL650, do you also have a picture of the real CL650

[ois650]

2 hours ago, cloudfreak1 said:

thank you very much for the detailed explanation
The picture above is self-explanatory but I can't quite see it on the CL650, do you also have a picture of the real CL650

Check it out in sim. The gear and gear pins are exactly as they are in real life. 

[Kimo]

Just guessing: The main gear does not have an overcentering like bigger jets, but I think an internal lock in the actuator. With A pin installed you can force the internal lock to stay engaged.

[JRBarrett]

4 hours ago, Kimo said:

Just guessing: The main gear does not have an overcentering like bigger jets, but I think an internal lock in the actuator. With A pin installed you can force the internal lock to stay engaged.

That is exactly right. The lock is internal inside the actuator, and the pin prevents it from moving to the unlocked position.

[cloudfreak1]

do I have to imagine schematically that the pin moves a rod inside the hydraulic tube, which in turn activates the locking mechanism or where sitts the lock internally inside the actuator 
chould you schow me on the picture about please

 

[Ben Russell]

Complicated = failure.

 

[cloudfreak1]

....I already thought so

[cloudfreak1]

ok, so i will live with the knowledge, it is internally inside the actuator wherever that is exactly (very complicated)
however i thank you all for the information, but will now return to the wonderful CL650

[Lightcivvie]

it IS a wonderful sim that Hot Start have created here!!!!

See the drawing (sic) below for the main gear locking mechanism. Claws that are part of the upper portion of the actuator (in black) grab the top of the lower portion of the actuator (in red - this is the shiny part of the actuator seen in the picture of one of the previous posts).

The locking mechanism is a "hat" (in green) that positions itself over the claws and prevents them from releasing. 

When the gear handle is down, hydraulic pressure is continuously applied on the down side, which will (should) keep the gear in the down position, and the "hat" over the claws, even when the pins are not in.

When you select gear up, hydraulic pressure lifts the hat, and pushes the lower actuator up a bit. The claws will spread and the actuator moves to the retracted position.

Before you switch off hydraulic system 3, you have to put the pins in. The pin locks the "hat" over the claws, thus preventing actuator movement.

If you forget to remove the pins and take off, the gear will not come up because the hat remains in place and the claws can't spread. People have tried...