Hi Doug,

Do you happen to know what configurations they are testing ? e.g. are they doing extended duration testing with a 450 gyro, without a regulator, on a freshly charged 5-cell NICAD pack, etc ?

Any idea what the max voltage is that they test to ?

Hopefully Horizon will by now have received the first pair of servos that I returned to them. These are the ones that were dead from the get-go (tested on a 4.8v setup with no gyro). The second pair are the ones that failed in the aircraft, after 37 flights at up to 6.6V unregulated, and driven by a 450 gyro - very much like David's setup, I believe.

BTW, did DavidR return his faulty servos yet ?

Please convey my thanks to the folks at Horizon for them being so willing to look into this - it would have been oh so easy to just say "user error" right from the start. The fact that they will go to this effort for just two people reporting a problem adds to their credibility as far as I am concerned. (And note that I don't discount the possibility that the two that were on-board failures may still count as user-error due to over-voltage!)

I already gave Horizon my contact info, and they are more than welcome to call me with any questions that they may have.

Once again, for everyone else reading this - please don't over-react and assume that a few isolated failures equate to all 3421's being bad - that would do no-one any good.

Regs,
Gordon