Show us your RRC bonnet Vents

The vents on bonnet of my mates new RRS are just decorative they aren't actual vents at all.

Quote:

Originally Posted by Meccles

The vents on bonnet of my mates new RRS are just decorative they aren't actual vents at all.

Is it a supercharged v8 or svr or just diesel?
Can anyone confirm that this is the case with all RRS's even the RRS SVR (which I imagine would need significant venting at 550hp)

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Quote:

Originally Posted by Mercguy

I had a technical call in with Davies Craig yesterday to discuss some details of a specific fan I had intended to use, to replace the viscous hub in the RRC.

They have a japanese made DC motor. Not all are brushless, but some are. In my application (DC31) the fans I intend to use are brush type.

they Have an IP equivalent rating of 62. the IP62 rating of the motor means it is dust tight and water resistant to Vertically dripping water when the enclosure is tilted at an angle up to 15? from its normal position.

That doesn't sound like a hell of a lot of water 'proofing' but I was assured the units were more than suitable for the application.

This advisory was given with the specific proviso that prior to immersion, the fans were turned off - manually - (blackrangie = correct) and that water be allowed to drain from them on departure before re-engagement.

The advisory also indicated that if there was a specific concern towards extremely turbid liquid material entry (i.e. heavily muddy silty water) then the fans should be rinsed ASAP, to prevent the detritus from drying out inside the cavity.

So, while the '2' part of the IP62 rating equivalent had me concerned, I'm comfortable with the explanation provided by the technical officer at Davies Craig regarding their products.

But.... I wouldn't want to test this against a warranty claim, because I'm not so sure that any immersion, partial or complete - regardless of how well rinsed and dried it was afterwards, would stand up.
(Trimmed quote)

Ok found another good fan IP68 waterproof and rated to operate 24hrs

... Note the dimples on the rear (low pressure) side of the blades ? - same reason as a golf ball has dimples, and a certain car in the US has a coating of modelling clay, - with dimples.
VIDEO: Mythbusters test golf ball-like dimpling effect on fuel economy (*Spoiler Alert!*)

My new evap. house cooler has them too. :)