Re: Whistling Billy Replica
Posted by:
Nick Howell (---.147.51.84.dyn.plus.net)
Date: October 21, 2015 04:48AM
I should have replied earlier but I've been more in the garage more than in front of a screen....
After four years of various degrees of advice from steam experts toward getting my Toledo up and running, desipte my wish for that to be as close to its original set up as possible, I was still having problem with the maim jet only producing a weak and wishy washy stream of vapour. Even with the fuel tank pressure up at 50 psi, which is the top of the gauge on a Toledo, we were only still only just getting something like the blast of fuel vapour that I had seen on other cars.
And then, whilst peering under both Bob and Arnould's 1903 Whites when they were firing up on the Midlands Meander this year, it clicked.....I may have plumbed in the steam automatic the wrong way around! Following the original Toledo layout is all very good if you know that there are plenty of examples successfully running around today or you have some original handbooks to work from, but I don't, and of the other Toledo's that are running none have the original pilot lights or burners.
I had the automatic holding back vapourised fuel,just before the main jet; the Whites and Stanleys hold back raw fuel before the vapourising coil. Consequently I was not gaining the increase in pressure when the fuel cahnged to a vapour inside the coil (P=VxT). A quick replumb of the fuel lines, fire up again and WOW! What a difference, a proper blast of vapour going up the inlet tube with the fuel pressure gauge reading just 30 psi. Four years of having the automatic the wrong way around, four year years!
So now I am starting all over again with fuel mix trials and jet sizes. To date: after running ten miles with Bob and John Dyke, in their own steam transport, to the pub for lunch on teh way back we started havimng blow backs and a weakening pilot light flame. Back home the next day I found the vapourising tube, at the pilot light end, completely filled with carbon. Incredible that any vapour got throught at all. The fuel mix had been 75% unleaded petrol 25% kerosene (actually Paraffin Extra, Caldo's "Steam Car Fuel") and there were times when the vapourising tube, where it enters the pilot light casting, was glowing orange; so too hot? But too hot for what, the unleaded petrol or the kero?) I lean towards the unleaded petrol, but have no hard proof to go on, but it is unlikely to be the, jet fuel, keroscene.
Other minor problems were a steam leak and a loosening safety valve. The steam leak was not, as Bob thinks, the amazingly designed and extremely reliable Toledo flexible engine mounting--a hollow, steam proof but easily adjustable 3" ball joint--but came from two weak threads from cylinder head bolts that enter the steam space on the top face of the block; re-tapping a size up has sorted the problem.
I made a new vapourising tube to replace the blocked one, this time with a route around the edge of the main burner in an attempt to make it cooler; and fired up with pure kerosene on Friday night. Lovely blue flames on both pilot and main burner. Last Saturday morning, warming up in readiness to meet the Dyke bothers and their two White's I had a couple of blow backs through the inlet tube when the steam automatic opened up the main jet. And then running up and down the lane I had nothing but blow backs and could not get the main jet to light up the burner normally at all. And yesterday all went well on pure keroscene, with the car on axle stands, until the burner pan got up to temperature and the main jet would not light without blowing back.
Just a week to go before I have to drive the 320 miles to the "The Smoke"--London--to get in tune for the Lonodn to Brighton Run.
I had better get off this screen.....!