Mag blast tubes

[DanH]

Originally Posted by WingsOnWheels

Dan, One thing to note, Vans corrugated tube flows very poorly. I wouldn't be surprized if the flow were less than half of the same ID smooth bore tube. I don't have any hard numbers to back that up, but I tried to use some for an avionics cooling fan duct; it whistled and the flow through about 12" was almost non existant. The smooth tube I endes up using flows quite a lot.

The point being, the equivalent area of pressure loss may be much less.

Thanks Colin. Good note.

If it doesn't have much flow, it can't be doing much cooling.

[Maxrate]

We just installed dual PMags on a friends skybolt. The folks at Emag were very helpful on where the blast tube location needed to be and why. The heat from the engine oil is the primary source of heat that travels back to the electronics area of the mag. Placing the blast tube on the round area of the Pmag helps cool that area thus avoiding damage to the electronics in the mag.