I attach here a few photos I found of Allan from the digital era. Unfortunately, I was a student of Allan’s (1984-1989) in the days when cameras had film, and I have no images of Allan from that period.
[L-R] Douglas Hart; Yan P. Kuhn de Chizelle; (unsure); Allan Acosta
Allan J. Acosta Blog 
Thanks to everyone for all the stories, which make me wish I could have known him better. I took his fluids class in 1981-1982, quite an energetic lecturer. Sometimes I wondered if he was a little bored teaching the same undergrad material after many years (he went through the lectures like a machine, he knew it so well), but always with amazing enthusiasm. I talked with him one-on-one on several occasions, including years later, probably 1989, about my PhD research at UC Davis. I ended up doing rocket engineering after that. I fondly recall the bumper sticker on his car parked in the Thomas Lab lot, “Old sailors never die, they just get a little dinghy.” Happy sailing, Allan.
John W.
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