The electric starter relay assy. is on some ROTAX be a part of the Engine Type Design. Such a PAC part has been then test- ® Aircraft Engines not ed and released by BRP-Rotax, but it might not be certified for the relevant engine type. In such a case the correct function in conjunction with the entire system is the responsibility of the aircraft manufacturer and must be carried out jointly with the aircraft.
Reason
In the course of product maintenance and expansion of our spare parts program, an electric starter relay assy. is available.
Subject
Electric starter relay assy. for ROTAX® Aircraft Engines.
| Part no. | Description | Application |
| 992818 | Electric starter relay assy. | |
| 242214 | Hex. nut M6 | Electric starter relay |
| 945831 | Lock washer A6 | Electric starter relay |
for further material and procedures to install starter relay assy. in the aircraft check with aircraft manufacturer's instructions for continued airworthiness.
Installation - related information
See current Installation Manual (IM) for the respective engine type. The minimum cable cross-section for the wire from the battery to the electric starter relay assy. and from there to the electric starter and for the ground wire (start system) depends on the wire length “I” (= Sum of the supply wire and ground wire of the electric starter) and has to be calculated according to the table found in the Installation Manual (IM), Chapter 80-00-00.
Electric starter relay assy. technical data
Activation of electric starter relay assy. limited to short duration. The duty cycle over an interval of 4 minutes is 25%.
NOTE: For ROTAX® 912 iS Sport (Series) and ROTAX® 915 iS A (Series) an electric starter relay assy. must be installed isolated from airframe ground.
| Nominal voltage | 12 V/DC |
| Control voltage | Min. 6 V / Max. 18 V |
| Switching current | Max. 75 A (permanent) Max. 300 A/1 s (short duration) |
| Permissible ambient temperature | Min. -40 °C (-40 °F) / Max. +100 °C (212 °F) |
| Weight | See Installation Manual (IM) Chapter 72-00-00 section Weight. |
| Main current connections | M6 screw connection (Tightening torque 4 Nm (35 in. lb) suitable for wire terminals according to DIN46225 (MIL-T-7928; PIDG or equivalent). |
| Control wiring | 6.3x0.8 plug connector suitable for Faston connector (female) according to DIN 46247(MIL-T-7928; PIDG or equivalent). |
| Grounding | For ROTAX® 912 iS Sport (Series) and ROTAX® 915 iS A (Series) the must be installed isolated from the airframe ground. For ROTAX® 912 (Series) and ROTAX® 914 (Series) the relay housing is normally connected to airframe ground (see relevant Installation Manual). |
Engine type ROTAX relay assy. housing and mounting tabs must be isolated from both airframe ® 912 iS Sport and ROTAX® 915 iS A electric starter ground and EMS ground. For ROTAX® 912 (Series) and ROTAX® 914 (Series) the relay housing is normally connected to airframe ground (see relevant Installation Manual).