cheap airboat prop hubs

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raymondbird

Active Member
Joined
Nov 29, 2008
Messages
31
Location
Belleville, Ontario Canada
Could anyone tell me why I couldn't, or shouldn't, make my own scale propeller blades out of laminated spruce to fit into a large Whirlwind (or Sensenich) ground adjustable three blade airboat prop hub?

The hubs sure look really beefy. Only have to make one blade, then dupe it.

Just having a very hard time finding a large scale looking prop that I can afford for my 3/4 ME 109

Thanks
 

Riggerrob

Well-Known Member
Joined
Sep 9, 2014
Messages
1,302
Location
Canada
According to their website, Whirlwind sells a wide variety of 2, 3, 4, 5 and 6-bladed hubs for airplanes, airboats and wind tunnels. They also make replacement, composite blades for the communist/surplus radial engines installed in CJ6 warbirds.
Maybe half of those hubs look like traditional airplane parts. The rest look like they were ddesigned signed for airboats.
 

BBerson

Well-Known Member
HBA Supporter
Joined
Dec 16, 2007
Messages
12,826
Location
Port Townsend WA
Spruce is softwood. Probably OK for a small fixed pitch homemade prop.
With the necked down prop root, usually the blade is reinforced with something. My Hoffmann prop blades have special compreg inlays at the hub. Anything can be homemade. But most amateurs don't mess with adjustable blades without some prior prop experience, I suppose. A blade loss is bad news.
 
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