Cotswold Heritage Alternator

[RustkolectorParticipant @rustkolector]

Has anyone built the Cotswold Heritage 6v alternator kit? I would like to know the alternator RPM vs voltage and wattage capability. I'm looking for something like this to put a 15 watt + load on an IC engine. I have emailed Cotswold some time ago, but no response.

Jeff

[RustkolectorParticipant @rustkolector]

[DerryUKParticipant @derryuk]

Jeff I have no experience of the Cotswold but I do have some with Lucas motorcycle alternators. It seems to me you could build yourself a small rig for one and use this for your 15w load.

Besides the alternator you would need an AC voltmeter and ammeter and variable resistor as a load (W=V x A).

I have logged the ouput of some Lucas alternators and my rig here …

What alternator rpm did you hvae in mind?

[RustkolectorParticipant @rustkolector]

DerryUK,

My engine is a slow speed model ~450-500 RPM and the drive ratio best suited to my plans would be about 1:5, so the preferred alternator speed would be approximately 2500-2600 RPM. This fits well with the advertised Cotswold alternator speed of 2600 RPM. However, Cotswold only advertises the output voltage. The purpose of the alterantor is to load the engine as well as make a more interesting model engine. Any output date on the Cotswold alternator, or other suitable vintage looking alternator would be appreciated.

Jeff

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