I use my Curta Type-I mechanical calculator daily. My (younger) guys in the shop just shake their heads.
Hard to explain what the heck that thing is in my briefcase though, when clearing airport security.
Robin.
Electricity here (North East BC) averages 7.26 cents per kW-hr, for domestic use. Is electricity "green"? No, however I do live next to a 2.9gWe hydroelectric dam, which although the North American grid is interconnected, and gets a lot of it's power from coal fired plants, I take a bit of...
racookpe1978: Any ground temperature above +5C. will work effectively as a heat source for domestic heating. I have geothermal heat in my home, with average winter ground temp at +5C, and it works just fine.
(Northern British Columbia. 2400 Sq. Ft home, 65,000 Btu geothermal unit. 6 X 300' of...
unxgtrwd: Likely the closest you will get, short of reading the correct manual, or bumping into an experienced Honda tech, is to set the camshaft so that the middle of the valve overlap period is at, or as near as you can get to TDC. About as simple as I can put it.
Robin Sipe.
Viper: What application is your 2-stroke being used for, and do you need a wide power band, i.e. Motorcycle, with a gear type transmission, or CVT clutches? The snowmobile guys with CVT's have been pushing 17.5:1 compression for a few years now, but obviously, they tune for one RPM. (Clutch...
ebarba; Tough one to pin down, due to so many variables, but here where I live, on average, the automotive based industrial longblocks are changed out every 1.5 years. (If run 24/7, with regularily scheduled maintenance.) In your case @ 1500 Run Hours/Year, perhaps you might expect eight years...
Bribyk nails it on the head, around here, in Northern British Columbia, there are a good number of GM industrial Vortec, and Ford industrials running small gen sets, and when they stop running, a replacement long block is put in, and old one tossed in the recycle bin. Sounds wasteful, but this...
Some turboprop engines have a two piece driveshaft, (Inner, main shaft transmits the torque, the outer is a floating reference sleeve, locked to the inner shaft at the input end.) and use phase shift between the two shafts as measured via gear type pickups at the output end. So long as you know...
The Westinghouse turbines I mentioned are the old W-92 units, (9000 shp, 2-spool.)a bit bigger than the Frame-3.
Questions for Hilliard? Well, first you will need to overlook the sales pitch, and ask for real empirical data as to average starts between rebuilds, past failure modes, and tolerence...
kahlilj; 6900 Rpm will be full rated speed for a Frame-3 engine. For liquid fuel, you can light off the engine at a minimum of 10% speed, or 690 Rpm. For Natural Gas fuel, light off minimum speed is 14% or about 1000 Rpm.
The test cell I refer to, is my test cell, where we run aeroderivitive...
To answer your question; Is it typical? No. Is it desireable? Sure. Having a starter that potentially has more torque available than that required, is a good thing, and leads to consistent lightoffs, and starts. Short of breaking the N1 starting drive shaft, there isn't such a thing as too...
Check out any current snowmobile magazine. In the back section there are usually a few companies advertising plating Stateside. If you are talking 50-100 cylinders, you should have a bit of leverage to keep the total cost per cylinder in-line.
Robin Sipe.
I've never been a fan of positive displacement pneumatic starters. Unless the supply air is very clean, they tend to have high wear rates, and generally require lubricators placed in-line with the air supply. (Vane type.)(Read messy, and high maintenance.) Frame-3 units hang on the starter for...
dgallup: I realised on my drive home tonight, after thinking about assymetrical port timing, that in a typical loop port two stroke, on the piston upstroke the transfer ports close before the exhaust port. In a rotary, obviously this is not the case, with the intake port closing well after...
