Martlet Aero

M120H datasheet

Hybrid-ready. 25 kW where the alternator used to be.

DRY MASS 71.8 KGGEN OUTPUT 25 KWASSIST +33 HP / 90 STAXI ENGINE-OFF
Document
DS-M120H-2026
Revision
C
Issued
2026-07-01
Sheets
1 of 1
M120H hybrid-ready flat-four with the axial-flux starter-generator ring between the core and the reduction drive
General arrangement
Type dataM120H · 2026
Configuration
Flat-four + axial-flux motor-generator
Displacement
1,340 cc
Max power (combined)
120 hp + 33 hp electric assist (90 s)
Generator output
25 kW continuous @ 5,500 rpm
Electric taxi
Yes — engine-off, 8 kt on paved surface
Reduction drive
2.43 : 1 helical, shared case
Dry mass
71.8 kg (less battery)
TBO
2,000 h core / 4,000 h MG inspection
Fuel
91E10 mogas / UL91 / 100LL
DC bus
540 V nominal, isolated HV harness
Ignition & injection
Dual-channel FADEC + MG inverter cross-link
Propeller flange
SAE-1
Combined power and torque, measured on the cellCELL DATA
045901351800751502253002,0002,5003,0003,5004,0004,5005,0005,500Crank rpmhpN·m
Combined powerCombined torque
Installation envelopeFWF
664 mm overall542 mmMartlet AeroM120H FWFSide elevSheet 1 of 1Scale NTSRev E
CommercialEX-WORKS FILTON
Firewall-forward price
$31,900
Deposit to hold a build slot
$2,500 (refundable)
Warranty
3 yr / 1,000 h, whichever comes later
Documentation
Free — manuals, ICD, parts catalog

Martlet Aero Ltd, Filton, Bristol. Specifications subject to service-letter revision; data taken from published test-cell records.

Configure & orderBack to the M120H
Close on the crankcase top deck: the riveted identification plate reading M160T, serial and works
Parting line