Various Signal Arms with Posts, Lamps, counter ballance levers plus some service ladders.

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Home_Signal_Arm_and_Post_plus_service_ladder_Drawing1

Files saved at dpi =  112 x 112 pixels/in

File sizes  =  103 x 34  pixels

Over all longest dimension 5ft 8.65in (103 pixels) is measured horizontally, and the measurement is taken, left to right, across the whole length of the signal arm.

The measurement you should get is:

 Scale = 22.8833 mm

 Proto = 5ft 8.65in  (5.720825ft)

The ‘Sketchboard’ scaling factor becomes:

103 /5.720825  (103 / 5ft 8.65in) = 18.0044, rounding  = pf1800

 Image height scale = 7.4 mm

 Proto = 1ft 10.2in  (1.85ft)

File Name:

lq_home_signal_arm_with_post_lamp_and_counter_balance_fittings_plus_service_ladder_5ft_8p65in_x_1ft_10p2in_v1_a1a_brian_nicholls_z2z_pf1800

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Distant_Signal_Arm_and_Post_plus_service_ladder_Drawing1

Files saved at dpi =  112 x 112 pixels/in

File sizes  =  103 x 34  pixels

Over all longest dimension 5ft 8.65in (103 pixels) is measured horizontally, and the measurement is taken, left to right, across the whole length of the signal arm.

The measurement you should get is:

 Scale = 22.8833 mm

 Proto = 5ft 8.65in  (5.720825ft)

The ‘Sketchboard’ scaling factor becomes:

103 /5.720825  (103 / 5ft 8.65in) = 18.0044, rounding  = pf1800

 Image height scale = 7.4 mm

 Proto = 1ft 10.2in  (1.85ft)

File Name:

lq_distant_signal_arm_with_post_lamp_and_counter_balance_fittings_plus_service_ladder_5ft_8p65in_x_1ft_10p2in_v1_a1a_brian_nicholls_z2z_pf1800

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Home_Signal_Arm_and_Post_no_service_ladder_Drawing1

Files saved at dpi =  112 x 112 pixels/in

File sizes  =  103 x 20  pixels

Over all longest dimension 5ft 8.65in (103 pixels) is measured horizontally, and the measurement is taken, left to right, across the whole length of the signal arm.

The measurement you should get is:

 Scale = 22.8833 mm

 Proto = 5ft 8.65in  (5.720825ft)

The ‘Sketchboard’ scaling factor becomes:

103 /5.720825  (103 / 5ft 8.65in) = 18.0044, rounding  = pf1800

 Image height scale = 4.1167 mm

 Proto = 1ft 0.35in  (1.029175ft)

File Name:

lq_home_signal_arm_with_post_lamp_and_counter_balance_fittings_no_service_ladder_5ft_8p65in_x_1ft_0p35in_v1_a1a_brian_nicholls_z2z_pf1800

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Distant_Signal_Arm_and_Post_no_service_ladder_Drawing1

Files saved at dpi =  112 x 112 pixels/in

File sizes  =  103 x 20  pixels

Over all longest dimension 5ft 8.65in (103 pixels) is measured horizontally, and the measurement is taken, left to right, across the whole length of the signal arm.

The measurement you should get is:

 Scale = 22.8833 mm

 Proto = 5ft 8.65in  (5.720825ft)

The ‘Sketchboard’ scaling factor becomes:

103 /5.720825  (103 / 5ft 8.65in) = 18.0044, rounding  = pf1800

 Image height scale = 4.1167 mm

 Proto = 1ft 0.35in  (1.029175ft)

File Name:

lq_distant_signal_arm_with_post_lamp_and_counter_balance_fittings_no_service_ladder_5ft_8p65in_x_1ft_0p35in_v1_a1a_brian_nicholls_z2z_pf1800

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Calling_On_Signal_Arm_and_Post_no_service_ladder_Drawing1

Files saved at dpi =  112 x 112 pixels/in

File sizes  =  78 x 19  pixels

Over all longest dimension 4ft 4.55in (78 pixels) is measured horizontally, and the measurement is taken, left to right, across the whole length of the signal arm.

The measurement you should get is:

 Scale = 17.5167 mm

 Proto = 4ft 4.55in  (4.379175ft)

The ‘Sketchboard’ scaling factor becomes:

78 /4.379175  (78 / 4ft 4.55in) = 17.81157, rounding  = pf1781

 Image height scale = 4.0167 mm

 Proto = 1ft 0.05in  (1.004175ft)

File Name:

lq_calling_on_signal_arm_with_post_lamp_and_counter_balance_fittings_no_service_ladder_4ft_4p55in_x_1ft_0p05in_v1_a1a_brian_nicholls_z2z_pf1781

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