Federal 500 wrote: ↑Tue Dec 26, 2017 7:59 pm
I personally think they look like a square horned T121
Your correct ,I don't know the diameter of the T-121 with the horns on ,but the Model 120s diameter with the horns on is 8 feet in diameter according to John G Powell. The Blower is a small Paxton centrifugal blower that is powered by a 5 HP TEFC motor ,Which sat under the horns on the metal flange that the Whelens sit on.
I'm currently still working on it ,I haven't got the rotor motor yet since I was excepting my dad to buy one for Christmas ,But he told me for my Birthday in February. I don't know when I'll get the blower motor ,but the siren should be completely done sometime next year.