Kite foil

Armstrong, 2025

WKT Mk II

1092mm long · 3'7"

419mm wide

32mm thick

10.5litres

Open in Studio See it on armstrongfoils.com

Sizes & Numbers

Listed by the brand, read off a photo, or worked out: where every number comes from

In one line

Shorter and narrower than the 2024. The 10.5 L is 128 mm shorter and 19 mm narrower than the Mk I 9.5 L.

10.5 L against the Mk I 9.5 L, listed length and width.

As listed by Armstrong

Armstrong WKT Mk II: every size as listed by Armstrong
sizelengthwidththicknessweight
10.5 L3’7 · 1092 mm419 mm32 mm–
12.5 L4’0 · 1219 mm435 mm32 mm–

Every size side by side, tails on one line, one scale

121910920 mm109210.5 L412 w121912.5 L431 w

Next to your board?

Lay the Armstrong WKT 10.5 L over up to four others, at one scale.

Compare with…

Generations

Before it · Mk I, 2024

The Mk II 10.5 L is 128 mm shorter and 19 mm narrower than the Mk I 9.5 L; its wide point moved 82 mm toward the tail. Open the Mk I

listed length and width · wide point derived

Mk II 10.5 L over the Mk I 9.5 L, tails aligned, one scale
Mk II 10.5 L Mk I 9.5 L

The Armstrong WKT over time

Shape & Rocker

From above, then from the side, true scale · the chosen size solid, the others dashed

Armstrong WKT Mk II from above and from the side, every size at true scale, tails aligned
Armstrong WKT Mk II from the side, true proportions: the bottom's rocker over a flat table, every size

Read off the 10.5 L outline · derived

49 %wide point, 538 mm from the tail

2.65length over width

390mm wide 12″ from the tail

3,872cm² of planform

Read off the 12.5 L outline · derived

50 %wide point, 614 mm from the tail

2.83length over width

399mm wide 12″ from the tail

4,516cm² of planform

Rocker of the 10.5 L · measured

4 mmtail rocker, at the tip
2 mm12″ from the tail
6 mm12″ from the nose
68 mmnose rocker, at the tip
658 mmflat to within 3 mm, from 5 % to 66 % of the length
48 %of the length to the lowest point, from the tail
48 mmat its thickest, 44 % from the tail · on the photo; Armstrong lists 32 mm
17 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 12.5 L · scaled from the 10.5 L measured

4 mmtail rocker, at the tip
2 mm12″ from the tail
9 mm12″ from the nose
77 mmnose rocker, at the tip
624 mmflat to within 3 mm, from 14 % to 65 % of the length
48 %of the length to the lowest point, from the tail
48 mmat its thickest, 44 % from the tail
18 mmlonger along the bottom curve than flat

Lay this rocker over other boards

True proportions · dots at 10 mm and 12″ in from each tip · bracket: flat to within 3 mm · Measured on Armstrong's photo of the 10.5 L. Tail end set by Armstrong's photo convention, not checked by a person.

Reviews & Videos

Original pages · 1

Similar Boards

Closest outlines from other models, once stretched to one length and width · derived