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| Toggle switch for small aircraft charging system in case of failure |
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| ITman496:
Its fine! Air systems like that are very counter-intuitive. Axial compressors are very difficult at small scales. |
| richard.cs:
As a thought more related to your original question, you said you had a large, and presumably therefore also heavy, lead acid starting battery. Have you considered options for reducing that weight, smaller batteries that can still manage the starting current, lithium rather than lead, etc.? Is it used for much other than starting (do you actually need capacity or just peak current)? |
| ITman496:
I have considered a lithium battery but to save some money I am sticking with lead acid for now. Can always change, though! The issue is that my regulator will likely be set for a lead acid float voltage that is too high for the lifepo4 powersport battery packs. So I'd need to get a regulator rated for lithium. Then I need to get a lithium that is a good quality. All said and done, both would add up to likely 3-400 dollars for not junk parts. Or, I can spend 70 dollars on a good lead acid battery and use my existing parts and be okay. For now, just keeping it simple. ....says the person who just did all this stuff with the disconnect. :palm: |
| ITman496:
Just to update. Engine tested at high power with no serious mishaps. Charging system working! Switch shunt not tested but.. here's hoping! And yes, the person (my friend) walking around and near the propeller while its spinning will get a talking to about safety distances and the axis at which a thrown propeller blade will likely travel! I was too distracted monitoring the engine to realize just how close he got at the time. |
| SkyMaster:
--- Quote from: ITman496 on May 15, 2020, 07:33:31 am ---Just to update. Engine tested at high power with no serious mishaps. Charging system working! Switch shunt not tested but.. here's hoping! And yes, the person (my friend) walking around and near the propeller while its spinning will get a talking to about safety distances ... --- End quote --- Your friend was very busy too, devices in both hands; measuring the engine temperature and filming the action. It seems that he walked around the spinning propeller with considerable distance when he switched side. Don't be too hard on him, but make sure he has less task to do next time ;) :) |
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