What Prop ?

It’s a Hartzell Compact prop. Hartzell make/made two different types of constant speed prop, the earlier Steel Hub and the later Compact; this is the latter and can be characterised by the hub being made in two halves with the blades in between. On the Steel Hub the blades fit into sleeves bolted directly onto a spider.

The part number should be stamped on the hub adjacent to one of the blades. The part number should start with ‘HC’, the fourth digit should tell you how many blades. The blade to the right of the part number is Blade No.1.

At the tip of the dome is a schrader valve for pressurising the interior of the dome with nitrogen.

These are fitted to a range of aircraft types and come in many different variations; two, three blades, counterweights or not, feathering or not etc depending on application.

Yes it is modern, probably off something like a Navajo, though it hasn’t got any deice boots on it, the engine it was attached to would be a Lycoming, as the toothed ring behind the prop which the starter engages on is painted in Lycoming grey….

Thanks Anon, You are the prop man ! I rather thought it may be modernish ? but hey! one never knows untill we hear from yourself 😉

Keith 🙂

Prop i/d

It’s quite a modern job but you’ll have to find the model number if you want to know what it’s off.

Not sure where that’ll be (it could be inside on the blade ends) though it may be stamped somewhere on the hub casing.

It’s a piston job as the large sprocket behind the hub is the starter ring. Probably off of a flat six engine.

Sorry, can’t offer much more than that.

Anon.

Have you tried contacting Hartzell direct? Details can be found here: http://www.hartzellprop.com/

As they made the prop, I would be surprised if they don’t recognise the type, and hence what aircraft type it would have been fitted to.