Jonathan_S wrote:And IIRC the microfusion power plants in pods and missiles also are designed around maintenance intervals that aren't much longer than their onboard fuel reserves. So even if you ran a hydrogen line to them to keep the reactor's fuel tank topped up you don't get a noticeable increase in sustained operation. You still have to power down, then strip it for refurbishment, or risk it going "boom".
(Don't know what the operational interval on the tractor emitters are - if you ran them off external power they might last significantly longer than the onboard fusion plant could; or they might not)
Yes, David said that integral to the micro-fusion design were some sacrifical parts that were replaced with every refuling/refurbishment. He also later stated that such parts were small and easily made in any peoperly equipped warship's workshops, so supply of said parts wasn't an issue.
I don't believe he ever mentioned the tractor's reliability, but since 99.9% of their functional lifetimes they are used in a zero force environment (ie inside the compensator field), they are rarely exerted, even though they are on all the time.