KMB JET28 (Rev. 3) including KaMeWa-like steering and thrust reversal

€57.90 *
Content: 1 material kit

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  • JET2804
Scope of delivery: 1x KMB JET28 (Rev. 3) thrust unit including KaMeWa-like steering and... more
Product information "KMB JET28 (Rev. 3) including KaMeWa-like steering and thrust reversal"

Scope of delivery:

  • 1x KMB JET28 (Rev. 3) thrust unit including KaMeWa-like steering and thrust reversal system
  • 1x KMB JET2804 screws set

RC jetboat drive for electric motors - up to 20000 RPM - up to approx.800 W - operational rpm range from  8000 to 20000 RPM - for custom-made RC model boats like Yachts, race  and sport boats as well as civil, research and military model vessels with approx. 50 to 150 cm length and 1,5 to 4 Kg weight ready to run per installed KMB JET28 unit.

Material kit: Includes unmounted / unassembled parts. For installing, works like grinding, glueing and drilling are required. Working materials not included

Features of the KMB JET28

  • Preassembled and ready to install JET28 (Rev. 3) suction tunnel, including impeller and motor shaft coupling (for motor shafts Ø 5 mm)
  • Solid, one-piece suction tunnel casing made from fibreglass reinforced ABS-injection
  • Ø 4 mm impeller shaft, impeller side notched, motor side leveled, impeller overmolded
  • Motor side ball bearing and axial nylon bearing washer
  • Impeller side sinter bronce bearing, axial steel and nylon bearing washer
  • Grease-filled, refillable Steven tube
  • Integrated motor mount incl. material (M4 threaded bolts and hexagon nuts) for mounting a motor or an adaptor flange)
  • Motor connection dimensions for motors or adaptors with 29 mm hole spacing and M4-threads (e.g. brushed 700-motor, MH11 or MH12)
  • KMB high load shaft coupling Ø 4 mm (drive shaft) / Ø 5 mm (motor shaft), pre-mounted
  • Direct mounting of motors with shaft lengths between 17 and 21 mm from connection surface possible
    - For using adaptor flanges (e.g. MH11 / MH12), the length of the adaptor flange needs to be added to the required motor shaft lengths mentioned above
    - By adding additional axial nylon bearing washers between the coupling and the ball bearing (underpinned Offsetting of the coupling), the required minimum shaft length can be reduced to 14 mm (+ adaptor flange length).
  • KaMeWa-like steering and thrust reversal system, made from fibreglass reinforced ABS-injection
  • The servo should have around 4,5 to 6,5 kgcm actuating power per connected JET28 steering system.

Further information:

Recommended motorisation (brushless, requires adaptor)

  • up to 10.000 rpm: Motors supporting a continuous power >= 200 Watt
    Cells (LiPoly) and motor-KV; rough current estimation for full throttle
    • 3S: KV <= 900; I ~ 18 A
    • 4S: KV <= 675; I ~ 13,5 A
    • 5S: KV <= 540; I ~ 11 A
  • up to 20.000 rpm (allowed maximum for JET28): Motors supporting a continuous power >= 800 Watt
    Cells (LiPoly) ans motor-KV; rough current estimation for full throttle
    • 3S: KV <= 1800; I ~ 75 A
    • 4S: KV <= 1350; I ~ 55 A
    • 5S: KV <= 1080; I ~ 44 A

Recommended motorisation (brush motors)

  • 700-class-Neodym-motors (up to 1650 rpm/volt) with 3S- to 4S-LiPoly
  • 800-class--motors (up to 1250 rpm/volt) with 3S- to 5S-LiPoly
allowed maximum operating speed (rpm): 20000
required power for maximum operatiing speed in single use (approx., Watt): 800
Static thrust: 12.000 rpm: approx 25 N, 16.000 rpm: approx. 35 N
length (mm): 191,5
width (mm): 42
height (mm): 56
weight (g): 103
length (JET28 suction tunnel, mm): 130
width (JET28 suction tunnel, mm): 38
height (JET28 suction tunnel, mm): 46
weight (JET28 suction tunnel incl. impeller and coupling, g): 71,5
wall thickness (JET28 suction tunnel, mm): 1,9
Ø (impeller casing, mm): 28
Ø (impeller, mm): 27
Ø (impeller shaft, mm): 4
materlial: fibreglass-reinforced ABS
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