XL Series Aircraft Engines
Engine
Bore (mm)
Stroke (mm)
Practical r.p.m.
Power (b.h.p.)
Weight (gram/ounce)
Normal Propeller
Shaft Threads
XL 15A
15.0
14.0
3,000-18,000
.45
165 / 5.8
7x6, 8x4
6 mm
XL 25A
18.0
16.0
2,200-12,500
.80
296 / 10.5
9x5, 9x6
1/4-28
XL 28A
18.55
18.4
2,200-12,800
.87
287 / 10.1
9x5, 9x6
1/4-28
XL 32A
19.0
23.0
2,200-13,000
.97
330 / 11.6
9x6, 10x5
1/4-28
XL 36A
20.0
23.0
2,200-13,200
1.10
311 / 11.0
9x6, 10x5
1/4-28
XL 40A
20.66
19.28
2,000-12,500
1.24
423 / 14.9
10x6, 11x5
1/4-28
XL 40AII
20.66
19.28
2,000-12,500
1.24
423 / 14.9
10x6, 11x5
1/4-28
XL 46A
22.25
19.28
2,000-12,800
1.43
418 / 14.7
10x7, 11x6
1/4-28
XL 46AII
22.25
19.28
2,000-12,800
1.43
418 / 14.7
10x7, 11x6
1/4-28
XL 53A
23.7
19.28
2,000-12,800
1.54
424 / 14.9
11x5, 11x6
1/4-28
XL 53AII
23.7
19.28
2,000-12,800
1.54
424 / 14.9
11x5, 11x6
1/4-28
XL 61A
24.0
22.0
2,000-12,000
1.89
609 / 21.5
11x7, 12x6
5/16-24
XL 61AR
24.0
22.0
2,000-12,000
1.85
609 / 21.5
11x7, 12x6
5/16-24
XL 75A
26.8
22.0
2,000-12,000
2.30
614 / 21.7
12x6, 13x6
5/16-24
XL 91A
27.5
26.0
2,000-12,000
2.68
672 / 23.7
13x6, 14x5
5/16-24
XL 108A
28.0
26.0
2,000-12,000
3.00
672 / 23.7
13x7, 14x6
3/8-24
XL 120AR
28.5
29.0
1,800-9,000
3.75
854 / 30.1
15x6, 16x6
3/8-24
XL 180AR
35.0
30.0
1,800-10,000
5.20
1560 / 55.0
16x12, 18x8
3/8-24