Fan blade/motor size guide?

[monkey spanners]

Does anyone know of a chart of blade sizes/pitch verses motor wattage for those shaded pole multifit motors?

Had 254/26' blade on a 7w motor today, think it should have a 16w or 18w but a chart would be useful!

Cheers

Jon :)

[install monkey]

looks like a bodge it and scarper job, i know the lunite cond fan motors are 28watt and the blade is about 400mm dia- found this-
http://www.hindawi.com/journals/ijrm/2011/537824/ lots of technical stuff
http://www.remco.co.uk/products/fanblades/fanblades.php remco site

[monkey spanners]

Cheers my fellow monkey!

found this chart,

http://www.remco.co.uk/products/emfr/emfr_fan_assemblies.php

Does look like a 7w is way too small, even with the shallower pitch.

[r.bartlett]

Like driers -always fit the next size up!