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Sat a 44 gallon drum on Steel beams about 4 inches above concrete and was using it as a fire bucket for heat at a party until the concrete exploded,lifting the drum about 4 ft in the air and blowing hot coals into people's hair. Blew a hole in the concrete about 1/2 inch deep and a perfect...

The water heated air intakes wouldn't of aided cold starts on the ntc cummins but they were turbocharged without inter cooling so it may of been a way to cool the charge air maybe

Entropy you mentioned that air is more viscous at higher temperatures is this why they have intake manifold heaters that are running radiator temp all the time.always thought it was stupid to heat the incoming air as we all work on cold air hot fuel and hot engine temps give the best power and...

Wow that blew me away I think they are a 4 valve head but I think your numbers are close enough.its amazing what horsepower is lost through the exhaust gas.it is intercooled.what would happen if you cooled the intake air by means of a airconditioner.do you think that to much air entering the...

I am actually trying to work out the btu in the exhaust gas. It is an electronically controlled common rail engine and according to the computer the engine load averages 70% . I know this is not model engineering but I know there are a lot of knowledgable people on here. Thanks

I m trying to work out the btu per hour on a 16 ltr 4 stroke turbo Diesel engine . The info I can share is that the turbo produces 31 psi boost the engine runs at 1650 rpm and the pyrometer averages 350 degrees celcius. Diesel burn is approximately 75 ltr per hour. Can anybody help

I have had a lot of problems with my al250g .although hare and forbes standing by warranty some parts have been on order nearly 6 months now as their supplier went out of business and they are trying to source from other suppliers, my electric motor has had trouble with the contacts and the...

Well this is generating a fair amount of debate. At least I'm confused for a reason,you would think that there would be common terms used around the world in engineering .thanks for all your replies

I had a lot of trouble finding silver solder in aus every time I asked for it I got a dumb look or got shown the little roll of silver solder for electrical work,it wasn't until I asked for silver braze that I got what I needed just wasn't sure on strength verses silver content properties.thanks...

Can someone explain the difference between the amount of silver in the rod and what effect this has on the strength of the weld and the materials to be joined,my local supplier has 2% 15% and 30% rods from 1.6 mm to 3.5 mm rods,I purchased some 2% 2.5 mm rids and tried them their melting point...

Wow what scale is this in going to go check out utube now

Hydraulic oil is also a very good drilling fluid

Only new to modelling,my first engine was a simple air engine with variable valve timing,my crank was 20 mm throw and I found that it choked a lot of the time, my current project is a multicylinder sterling of my own design. I am a truck driver most of the time operating 15 ltr cummins...

My thinking was that by moving the contact point with the crank u Change the centre point of the motion from the centre of the crank to the outer edge of the crank shaft,thinking that aswell as torque derived conventionally by the length of throw u also might gain from the additional twist of...

My passion is efficient operation of engines. There is no increase in friction and I would like to achieve more power without increasing the capacity. With the off centre crank it gives 2 points of twist force being excerted on the shaft itself without altering capacity , with the other design...

Instead of the big end being in a parralell line with the centre of the crank shaft if u off set it do u increase the twist force. If x length / throw = twist force then does having another point to exert force on crank increase power!try to explain again drawing are not good my etch a sketch...

design 2 thoughts please

Tinkering with a couple of crank design changes . Wondering if any of these designs offer any advantage over conventional cranks

Yeh I have got to disagree I believe that dishing the piston will decrease the compression due to increasing the space as the piston reaches top dead centre,same as lowering the head increases compression due to less room for the air to fill

Always thought compression ratio was a term only. The volume of air under compression becomes pressure which is a exponential of the original volume,sorry if I confused you here having trouble putting this to words, to raise compression you shave the head effectively decreasing volume, clear as...