Starter system
Hi folks
I have a couple of questions about the starting system of the r22 beta 2.
Here is what i know or i oughtta say, here is what i hope i know!
The starting system is designed to crank the engine up by imparting a rotary motion to the cranshaft via a battery powered electrical starter motor engaging a stater ring mounted on the same crankshaft and controlled by the IGNITION key: turning the key into the START position will ground the right magneto, will energize the starting vibrator system on the left magneto and will remotely close the starter relay allowing battery power to flow from the battery relay through a heavy duty wiring to the starter motor, driving a Bendix pinion out, engaging the starter ring on the crankshaft, imparting a rotary to the same crankshaft cranking the engine up and triggering the STARTER ON light in the cockpit. Once the engine has started and the engine drives the pinion faster than the starter motor, a clutch will drive the pinion out and away from the starter ring disengaging the starter extinguishing the STARTER ON light as well, the starting vibration system will be de-energized, the right magneto will be unabled and the key will spring back to the BOTH position allowing to resume normal dual magneto operations.
Should the STARTER ON light fail to extinguish once the key is returned to OFF, immediatly shut down the engine by pulling the mixture control and by turning the BATTERY master off and investigate the problem.
Should a fire occur while starting the engine the POH call s for:
1) continue cranking the engine to suck the flames and the excessive fuel out of the carburetor and into the engine
2) if the engine starts, run at 50 to 60% for a short time - ? -, shut down and then investigate the problem
3) if the engine fails to start, shut the fuel and the BATTERY master off
4) extinguish the fire with the extinguisher, wool blanket or dirt
5) investigate the problem
The questions are:
1) I dont see a wiring going from the ignition switch to the starter relay, is there a wire to remotely controlling the power supply from the starter relay to the starter motor? Is the starter relay energized at all times from the battery relay as long as the engine is running?
2) What does it mean for a "short time" in the fire during start procedure? Do you have any amount of seconds you use?
3) I couldn t find in the limitations section a time limitation on the starter - how many start attempts within a given timeframe nor a minimum voltage for a successful start, are there any, as far as you know?
Many thanks for your willingness!!!
Baobab72