Thread: some engine questions....

Originally Posted by clean32

Stirling

Well done! We had a small one at Griffith Uni . for open days. It was good fun to play with. But when it got too hot you had to let it cool down for a while.




As for the two pistons in one bore, there were several motorbikes which had a single (figure 8) bore with 2 pistons (and were connected at the cylinder head):


EDIT: this site has more info on the above engine:
http://home.sprynet.com/~inniss/sears.htm




I am sure there was an (prototype) engine with 2 crankshafts (like a reverse boxer) - where 2 pistons came together, so they acted as both piston and cylinder head. Anyone know what engine that was?

Originally Posted by vnx205

Another good question could have been, "Which engine simultaneously held the land, water and air speed records?"

The answer was one of the many interesting facts, explanations and pieces of trivia I noticed on Pedro's fascinating site.

i would say RR, the early veron to the Griffin, ie not the kestral or the merlin

Originally Posted by vnx205

Another good question could have been, "Which engine simultaneously held the land, water and air speed records?"

The answer was one of the many interesting facts, explanations and pieces of trivia I noticed on Pedro's fascinating site.

Without looking it up, I would say it was almost certainly the Napier Lion - from memory it was used in the early Schneider Trophy racers, one of which probably held the air speed record for a brief time, and it was definitely used in at least one land speed record car (Segrave?) and in the first Bluebird boat.

John

I am sure there was an (prototype) engine with 2 crankshafts (like a reverse boxer) - where 2 pistons came together, so they acted as both piston and cylinder head. Anyone know what engine that was?[/quote]

I have a feeling one went into production and was used in a patrol boat, Im not sure if it was English or American. I will have to quiz dad.

Blythe

An example of an opposed piston engine.
1 intake for the fuel-air mixture
2 supercharger (here: rotary vane pump; original: Centrix)
3 airbox to buffer and distribute the mixture
4 waste valve to limit the pressure level
5 outlet crank mechanism
6 inlet crank mechanism (runs app. 20° past the outlet to achieve an asymmetric control diagram)
7 cylinder with inlet and outlet slots
8 exhaust
9 water cooling jacket
10 sparkplug
moving picture (gif) of above

Hi, Do you know a bloke named "Thirsty" he used to live at Grafton and his dad actually built an apposed piston engine in a single barrell. This is a great little engine that has never really been recognised for what it is, Built in the late 50s it had it's crank along the top running off what are called swusher plates, and, this crank was also used as the impeller of the supercharger and a rotary exaust valve system. Being only a proto type it had no rings and I'm told it a a slight melting problem around 30,000 rpm. I never saw the engine going but I did play with it and it is a very cute little thing.

One of the big French veteran cars, Gobron-Brillie had an interesting engine that ran opposed piston in a common cylinder. The upper pistons were linked to the crankshaft by rods and crossheads. There was one in Melbourne, rerstored in the 50's?, but I have not seen or heard of it since then.

Answeres in RED

Originally Posted by Blknight.aus

ok so Im bored..... I'll give answers in a couple of weeks....

think you know engines and motors....

What types of engines/motors provide better preformance at higher altitudes without having to be retuned?
Reciprocating steam engines, some configurations of turbine engines, air-air intercooled turbo charged engines with aneroid compensation (this also covers most electronically controlled turbo charged engines

What types of motors/engines provide maximum torque at 0 Rpms.
Reciprocating steam engines, some turbine configurations and most electric motors

Whats the maximum number of strokes that a reciprocating engine has used and remained effective?
6, not counting hit and miss governed engines

does a reciprocating engine have to have a crank shaft?
no some pumping engines couple a piston directly to the bottom of a double acting piston and still in more common use is the diesel hammer which is essentially an upside down engine that fires the piston up out of the block on guide rods

can a diesel engine have a carby, more importantly can it have it as the only source of fuel that gets to the combustion chamber?
Yes some diesels that require preheating on petrol have a dedicated carby to supply the fuel during warm up, in the same era of diesels a 3 valve system was used one air intake, one exhaust and one from a vaporisor which does the same thing as a carby but fuels anything similar to diesel/kero power was controled by the opening duration of the vaporisor fed valve

do you have to have valves in a reciprocating diesel engine?

no, you can have a sleeve ported 2 stroke diesel

what fueled the first reciprocating engines?
wood and wood derivitives, the first reciprocating engines were steam powered

running diesel can you put 2 pistons into a single cylinder? if you can how could you make it work?
yes the commer knocker is the most common example with 2 pistons in a common bore connected to rockers which then couple to the crank



have fun....

Originally Posted by isuzurover

Another question: Which reciprocating engine is solar powered?

The stirling.but thats not the only thing it can run off