Heng Long Recoil Modifications
First picture shows the Heng Long recoil unit. In the picture I have already removed the plastic that would normal rest on the Heng Long rotating cam elevation unit. As I am now using the new elevation unit I no longer require this. I have drawn in the outline of the plastic that was
removed.
This picture also shows the bbl inserted into the rear of the gun. Doing this means you don't have to make any mods inside the gun or reattach the spring.Second picture shows the recoil unit with a contact switch in place and the necessary wiring to get it to work. Also I am using a graphic to
represent the gun motor, which is not visible in the picture.
removed.
This picture also shows the bbl inserted into the rear of the gun. Doing this means you don't have to make any mods inside the gun or reattach the spring.Second picture shows the recoil unit with a contact switch in place and the necessary wiring to get it to work. Also I am using a graphic to
represent the gun motor, which is not visible in the picture.
Second picture shows the recoil unit with a contact switch in place and the necessary wiring to get it to work. Also I am using a graphic to represent the gun motor, which is not visible in the picture.
So let me explain what is happening in this little circuit.
1 Power is supplied to the gun motor from the smoker jack. The resistor (20 ohm)drops the voltage to the recoil unit to slow down the return speed.
2. The power is routed through the contact switch on the gun. In its current position the contact switch is closed, and the power is fed from the HL board to the motor. If this was hooked to a battery the gun motor would be running and the gun would be moving back to it's fully extended position.
3. As the gun extends the contact switch is tripped open by the returning striker(A). As soon as the switch is open the power is interrupted and the motor shuts off with the bbl in the fully extended position.
4. To fire the gun you move the left joystick. A quick blip up. This supplied power to the motor, moves the gears to release and allow the spring to pull the bbl back. As soon as this happens the contact switch on the gun closes, and power for the smoker jack is allowed to power the motor again, and the cycle repeats.
If you wanted a gun flash,you would hook up a superbright LED with the short lead to the yellow wire, and the long lead to the Brown wire.(Add a 68 ohm resister to protect the LED. When you blip the throttle up this will power the LED to simulate a flash(Of course if you hold the left joystick up the LED will stay lit and not look very convincing. However all you need is a momentary connection to start the recoil motor and this works fine for a flash.)
That is all that is required to mod the Heng long recoil mechanism to achieve more realistic action.
1 Power is supplied to the gun motor from the smoker jack. The resistor (20 ohm)drops the voltage to the recoil unit to slow down the return speed.
2. The power is routed through the contact switch on the gun. In its current position the contact switch is closed, and the power is fed from the HL board to the motor. If this was hooked to a battery the gun motor would be running and the gun would be moving back to it's fully extended position.
3. As the gun extends the contact switch is tripped open by the returning striker(A). As soon as the switch is open the power is interrupted and the motor shuts off with the bbl in the fully extended position.
4. To fire the gun you move the left joystick. A quick blip up. This supplied power to the motor, moves the gears to release and allow the spring to pull the bbl back. As soon as this happens the contact switch on the gun closes, and power for the smoker jack is allowed to power the motor again, and the cycle repeats.
If you wanted a gun flash,you would hook up a superbright LED with the short lead to the yellow wire, and the long lead to the Brown wire.(Add a 68 ohm resister to protect the LED. When you blip the throttle up this will power the LED to simulate a flash(Of course if you hold the left joystick up the LED will stay lit and not look very convincing. However all you need is a momentary connection to start the recoil motor and this works fine for a flash.)
That is all that is required to mod the Heng long recoil mechanism to achieve more realistic action.