Various GWR Signal Arms front views.

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gwr_2ft_backing_signal_arm_front_view_over_scale

Files saved at dpi =  226 x 226 pixels/in

File sizes  =  116 x 53  pixels

Over all longest dimension 3ft 2.9in (116 pixels) is measured horizontally, and the measurement is taken, left to right, across the length from the left-hand straight vertical edge line of the signal arm to the outermost curved edge of the lens area on the right.

The measurement you should get is:

 Scale = 12.9667 mm

 Proto = 3ft 2.9in  (3.241675ft)

The ‘Sketchboard’ scaling factor becomes:

116 /3.241675  (116 / 3ft 2.9in) = 35.783969, rounding  = pf3578

 Image height scale = 5.95 mm

 Proto = 1ft 5.85in  (1.4875ft)

File Name:

gwr_2ft_backing_signal_arm_front_view_over_scale_3ft_2p9in_x_1ft_5p85in_v1_a1a_brian_nicholls_z2z_pf3578

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gwr_2ft_backing_signal_arm_front_view_true_scale

Files saved at dpi =  111 x 111 pixels/in

File sizes  =  58 x 28  pixels

Over all longest dimension 3ft 2.9in (58 pixels) is measured horizontally, and the measurement is taken, left to right, across the length from the left-hand straight vertical edge line of the signal arm to the outermost curved edge of the lens area on the right.

The measurement you should get is:

 Scale = 12.9667 mm

 Proto = 3ft 2.9in  (3.241675ft)

The ‘Sketchboard’ scaling factor becomes:

58 /3.241675  (58 / 3ft 2.9in) = 17.89198, rounding  = pf1789

 Image height scale = 5.95 mm

 Proto = 1ft 5.85in  (1.4875ft)

File Name:

gwr_2ft_backing_signal_arm_front_view_true_scale_3ft_2p9in_x_1ft_5p85in_v1_a1a_brian_nicholls_z2z_pf1789

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gwr_2ft_shunt_ahead_signal_arm_type_1_front_view_over_scale

Files saved at dpi =  226 x 226 pixels/in

File sizes  =  116 x 54  pixels

Over all longest dimension 3ft 2.9in (116 pixels) is measured horizontally, and the measurement is taken, left to right, across the length from the left-hand straight vertical edge line of the signal arm to the outermost curved edge of the lens area on the right.

The measurement you should get is:

 Scale = 12.9667 mm

 Proto = 3ft 2.9in  (3.241675ft)

The ‘Sketchboard’ scaling factor becomes:

116 /3.241675  (116 / 3ft 2.9in) = 35.783969, rounding  = pf3578

 Image height scale = 5.95 mm

 Proto = 1ft 5.85in  (1.4875ft)

File Name:

gwr_2ft_shunt_ahead_signal_arm_type_1_front_view_over_scale_3ft_2p9in_x_1ft_5p85in_v1_a1a_brian_nicholls_z2z_pf3578

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gwr_2ft_shunt_ahead_signal_arm_type_1_front_view_true_scale

Files saved at dpi =  111 x 111 pixels/in

File sizes  =  58 x 27  pixels

Over all longest dimension 3ft 2.9in (58 pixels) is measured horizontally, and the measurement is taken, left to right, across the length from the left-hand straight vertical edge line of the signal arm to the outermost curved edge of the lens area on the right.

The measurement you should get is:

 Scale = 12.9667 mm

 Proto = 3ft 2.9in  (3.241675ft)

The ‘Sketchboard’ scaling factor becomes:

58 /3.241675  (58 / 3ft 2.9in) = 17.89198, rounding  = pf1789

 Image height scale = 5.95 mm

 Proto = 1ft 5.85in  (1.4875ft)

File Name:

gwr_2ft_shunt_ahead_signal_arm_type_1_front_view_true_scale_3ft_2p9in_x_1ft_5p85in_v1_a1a_brian_nicholls_z2z_pf1789

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gwr_2ft_shunt_ahead_signal_arm_type_2_front_view_over_scale

Files saved at dpi =  224 x 224 pixels/in

File sizes  =  116 x 75  pixels

Over all longest dimension 3ft 2.9in (116 pixels) is measured horizontally, and the measurement is taken, left to right, across the length from the left-hand straight vertical edge line of the signal arm to the outermost curved edge of the lens area on the right.

The measurement you should get is:

 Scale = 12.9667 mm

 Proto = 3ft 2.9in  (3.241675ft)

The ‘Sketchboard’ scaling factor becomes:

116 /3.241675  (116 / 3ft 2.9in) = 35.783969, rounding  = pf3578

 Image height scale = 8.2667 mm

 Proto = 2ft 0.8in  (2.066675ft)

File Name:

gwr_2ft_shunt_ahead_signal_arm_type_2_front_view_over_scale_3ft_2p9in_x_2ft_0p8in_v1_a1a_brian_nicholls_z2z_pf3578

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gwr_2ft_shunt_ahead_signal_arm_type_2_front_view_true_scale

Files saved at dpi =  111 x 111 pixels/in

File sizes  =  58 x 39  pixels

Over all longest dimension 3ft 2.9in (58 pixels) is measured horizontally, and the measurement is taken, left to right, across the length from the left-hand straight vertical edge line of the signal arm to the outermost curved edge of the lens area on the right.

The measurement you should get is:

 Scale = 12.9667 mm

 Proto = 3ft 2.9in  (3.241675ft)

The ‘Sketchboard’ scaling factor becomes:

58 /3.241675  (58 / 3ft 2.9in) = 17.89198, rounding  = pf1789

 Image height scale = 8.2667 mm

 Proto = 2ft 0.8in  (2.066675ft)

File Name:

gwr_2ft_shunt_ahead_signal_arm_type_2_front_view_true_scale_3ft_2p9in_x_2ft_0p8in_v1_a1a_brian_nicholls_z2z_pf1789

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gwr_3ft_goods_line_signal_arm_front_view_over_scale

Files saved at dpi =  226 x 226 pixels/in

File sizes  =  148 x 83  pixels

Over all longest dimension 4ft 1.3in (148 pixels) is measured horizontally, and the measurement is taken, left to right, across the length from the left-hand straight vertical edge line of the signal arm to the outermost curved edge of the lens area on the right.

The measurement you should get is:

 Scale = 16.4333 mm

 Proto = 4ft 1.3in  (4.108325ft)

The ‘Sketchboard’ scaling factor becomes:

148 /4.108325  (148 /4ft 1.3in) = 36.024, rounding  = pf3602

 Image height scale = 9.1667 mm

 Proto = 2ft 3.5in  (2.291675ft)

File Name:

gwr_3ft_goods_line_signal_arm_front_view_over_scale_4ft_1p3in_x_2ft_3p5in_v1_a1a_brian_nicholls_z2z_pf3602

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gwr_3ft_goods_line_signal_arm_front_view_true_scale

Files saved at dpi =  112 x 112 pixels/in

File sizes  =  73 x 42  pixels

Over all longest dimension 4ft 1.3in (73 pixels) is measured horizontally, and the measurement is taken, left to right, across the length from the left-hand straight vertical edge line of the signal arm to the outermost curved edge of the lens area on the right.

The measurement you should get is:

 Scale = 16.4333 mm

 Proto = 4ft 1.3in  (4.108325ft)

The ‘Sketchboard’ scaling factor becomes:

73 /4.108325  (73 / 4ft 1.3in) = 17.768798, rounding  = pf1777

 Image height scale = 9.1667 mm

 Proto = 2ft 3.5in  (2.291675ft)

File Name:

gwr_3ft_goods_line_signal_arm_front_view_true_scale_4ft_1p3in_x_2ft_3p5in_v1_a1a_brian_nicholls_z2z_pf1777

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gwr_3ft_home_signal_arm_front_view_over_scale

Files saved at dpi =  226 x 226 pixels/in

File sizes  =  147 x 69  pixels

Over all longest dimension 4ft 1.3in (147 pixels) is measured horizontally, and the measurement is taken, left to right, across the length from the left-hand straight vertical edge line of the signal arm to the outermost curved edge of the lens area on the right.

The measurement you should get is:

 Scale = 16.4333 mm

 Proto = 4ft 1.3in  (4.108325ft)

The ‘Sketchboard’ scaling factor becomes:

147 /4.108325  (147 /4ft 1.3in) = 35.7810, rounding  = pf3578

 Image height scale = 7.55 mm

 Proto = 1ft 10.65in  (1.8875ft)

File Name:

gwr_3ft_home_signal_arm_front_view_over_scale_4ft_1p3in_x_1ft_10p65in_v1_a1a_brian_nicholls_z2z_pf3578

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gwr_3ft_home_signal_arm_front_view_true_scale

Files saved at dpi =  113 x 113 pixels/in

File sizes  =  73 x 35  pixels

Over all longest dimension 4ft 1.3in (73 pixels) is measured horizontally, and the measurement is taken, left to right, across the length from the left-hand straight vertical edge line of the signal arm to the outermost curved edge of the lens area on the right.

The measurement you should get is:

 Scale = 16.4333 mm

 Proto = 4ft 1.3in  (4.108325ft)

The ‘Sketchboard’ scaling factor becomes:

73 /4.108325  (73 / 4ft 1.3in) = 17.768798, rounding  = pf1777

 Image height scale = 7.55 mm

 Proto = 1ft 10.65in  (1.8875ft)

File Name:

gwr_3ft_home_signal_arm_front_view_true_scale_4ft_1p3in_x_1ft_10p65in_v1_a1a_brian_nicholls_z2z_pf1777

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gwr_4ft_home_signal_arm_front_view_over_scale

Files saved at dpi =  228 x 228 pixels/in

File sizes  =  198 x 70  pixels

Over all longest dimension 5ft 6.15in (99 pixels) is measured horizontally, and the measurement is taken, left to right, across the length from the left-hand straight vertical edge line of the signal arm to the outermost curved edge of the lens area on the right.

The measurement you should get is:

 Scale = 22.05 mm

 Proto = 5ft 6.15in  (5.5125ft)

The ‘Sketchboard’ scaling factor becomes:

198 /5.5125  (198 /5ft 6.15in) = 35.918367, rounding  = pf3592

 Image height scale = 7.6 mm

 Proto = 1ft 10.8in  (1.9ft)

File Name:

gwr_4ft_home_signal_arm_front_view_over_scale_5ft_6p15in_x_1ft_10p8in_v1_a1a_brian_nicholls_z2z_pf3592

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gwr_4ft_home_signal_arm_front_view_true_scale

Files saved at dpi =  113 x 113 pixels/in

File sizes  =  99 x 35  pixels

Over all longest dimension 5ft 6.15in (99 pixels) is measured horizontally, and the measurement is taken, left to right, across the length from the left-hand straight vertical edge line of the signal arm to the outermost curved edge of the lens area on the right.

The measurement you should get is:

 Scale = 22.05 mm

 Proto = 5ft 6.15in  (5.5125ft)

The ‘Sketchboard’ scaling factor becomes:

99 /5.5125  (99 / 5ft 6.15in) = 17.95918, rounding  = pf1796

 Image height scale = 7.6 mm

 Proto = 1ft 10.8in  (1.9ft)

File Name:

gwr_4ft_home_signal_arm_front_view_true_scale_5ft_6p15in_x_1ft_10p8in_v1_a1a_brian_nicholls_z2z_pf1796

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