flyrotary@lancaironline.net Mailing List Archive

Dave, I like the idea of Stone Furlongs/Hour glass. I thought to suggest perhaps Stone Furlongs/Sun Dial, but realized some people are in the dark about the rotary. Taking this further perhaps we should order "T" shirts with the Stone Hedgerow (England) monoliths on the back and "Rotary Stone Furlongs/Hour Glass...." on the front {:>). I'll bet if a couple of us wore them at a flyin it would certainly get questions {:>)

Getting too late, must be getting punchy.

Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC

----- Original Message -----

From: DaveLeonard

To: Rotary motors in aircraft

Sent: Thursday, August 12, 2004 10:53 PM

Subject: [FlyRotary] Re: DeltaT Coolant was : [FlyRotary] Re: coolant temps

Well, blighmy, blow me down. Who woulda thunk? Thanks Ed. Just for fun, maybe we should all start start measuring our heat in Stone*Furlongs. Excellent! Or perhaps the power of our 13B's as Stone Furlongs/ hour glass. Just to sound like we have been doing this since they built stone hinge. :)

BTW, 10 deg delta seems about right judging by the typically slow rate of rise of our water temperatures. If there were a 100 deg delta, I would expect coolant to hit 200 shortly after take off. Instead, it takes a good 20 min to settle in, even at climb power.

Dave Leonard

Right you are, Dave

Below is one semi-official definition of BTU in English units. 1 BTU is amount of heat to raise 1 lb of water 1 degree Fahrenheit.

So with Tracy's 30 gpm flow of water = 240 lbs/min. Since its temperature is raised 10 degree F we have

BTU = 240 * 10 * 1 = 2400 BTU/min

I know I'm ancient and I should move into the new metric world, but at least I didn't do it in Stones and Furlongs {:>)

Ed

The Columbia Encyclopedia, Sixth Edition. 2001.

British thermal unit