A320 Trim Wheel

Author
Discussion

Scabutz

Original Poster:

2,896 posts

44 months

Saturday 27th February
quotequote all
I wonder if anyone has any specs on the A320 trim wheel. Specifically how may turns of the black wheel corredpond to degrees of trim shows on the inner grey indicator wheel?

I'm building my own A320 quadrant for flight sim and want to motorise the trim wheel and indicator. I'd rather motorise them from.one source and then use the appropriate gear ratio for each.

Sway

17,772 posts

158 months

Saturday 27th February
quotequote all
Scabutz said:
I wonder if anyone has any specs on the A320 trim wheel. Specifically how may turns of the black wheel corredpond to degrees of trim shows on the inner grey indicator wheel?

I'm building my own A320 quadrant for flight sim and want to motorise the trim wheel and indicator. I'd rather motorise them from.one source and then use the appropriate gear ratio for each.
If you don't get an answer by Monday from those that fly/operate them - I'll get you the answer from the engineers at work.

Scabutz

Original Poster:

2,896 posts

44 months

Saturday 27th February
quotequote all
Sway said:
If you don't get an answer by Monday from those that fly/operate them - I'll get you the answer from the engineers at work.
Wow, that would be splendid, thanks.

Leadfoot

1,886 posts

245 months

Sunday 28th February
quotequote all

pitch trim control wheel
radius: 116 mm (4.5669 in.)
travel:
1.87 revolutions A/C nose down (including 0.01 revolution of overstroke)
6.32 revolutions A/C nose up (including 0.01 revolution of overstroke).
-
THS maximum authority: 4 deg A/C nose down, 13.5 deg A/C nose up
-
stops:


! ! THS Deflection !
! !-------------------------------------!
! ! A/C Nose down ! A/C Nose up !
!---------------------------------------!-------------------!-----------------!
! Max. operational deflection ! 4 deg + 5' ! 13.5 deg + 5' !
! (THS input-shaft stops) ! - 15' ! - 15' !
!---------------------------------------!-------------------!-----------------!
! Computer Limitation ! 3.5 deg + 5' ! 11 deg + 25' !
! ! - 5' ! - 30' !
!---------------------------------------!-------------------!-----------------!
! THS actuator input shaft stops ! 4 deg + 5' ! 13.5 deg + 5' !
! (without computer limitation) ! - 15' ! - 15' !
!---------------------------------------!-------------------!-----------------!
! Stops of actuator ball screwjack ! 4.3 deg ! 13.83 deg !


-
rate of travel:
Unit capability:
1 deg/s of THS actuator deflection in single-system operation (2 deg/s of THS actuator delection in two-system operation)
Electrical control rate limitation:
0.3 deg/s when flap position < 0.5 deg
0.7 deg/s when flap position > 0.5 deg
-


HTH

Scabutz

Original Poster:

2,896 posts

44 months

Monday 1st March
quotequote all
Thank you. Just so I am sure, A/C = Aircraft? I know what THS means

Leadfoot

1,886 posts

245 months

Monday 1st March
quotequote all
Correct

Scabutz

Original Poster:

2,896 posts

44 months

Monday 1st March
quotequote all
Leadfoot said:
Correct
Excellent. Thank you so much for the info.
beer