discussion Suck, Squeeze, Bang, Blow

[PaulTRose]

couldnt find a suitable place to put this wip......so its gone here since its a car engine lol lol


at the minute im a bit restricted model making wise


my compressor died 2 weeks ago and i cant afford a new one at the minute, too many other things having to come first


which means anything that needs air brushing is on hold.......such as the Brumbar.........my modelling for a while is either rattle cans or hairy brush ................................or no paint at all!


so im going to start something that requires no paint


its an Airfix 'Engineer' kit of a 4 cylinder internal combustion engine............basically you get all the bits to make a see through inline 4 banger which is powered by a small motor so you can see the crankshaft rotating, pistons and valves rising/falling......the spark plugs fire.....all in slow motion of about 30rpm......theres even sound!


and for those who dont know how a 4 stroke engine works the clue is in the title

suck......inlet valve open, piston at bottom, fuel/air mix sucked into the cylinder


squeeze.......valves close, piston rises, squeezes the fuel/air mix


bang......spark plug fires, 'explosion' pushes the piston down


blow.....exhaust valve opens, piston rises and blows out the gases


i used to work for a certain japanese car company and a gang of us were on a week long Technology course........part of it was a trip to the engine plant on Deeside......in reception there was a beautiful cut away engine where you could rotate the crank and see everything moving.....the guy teaching us didnt know how an engine worked!!!!....i casually dropped in 'suck, squeeze, bang, blow' and got a funny look.......ended up having to explain to the group how an engine works


i think this one might be fun since theres no painting and its a subject i know

to give an idea of scale, here is the crankshaft, manifold and fan with a pot of tamiya paint for size

cam belt cover, cylinder head and rocker cover

engine block

valves and dipstick

pistons and con rods

the 'starter motor' that drives it all

power/sound pack and spark plugs

bag of screws and head gaskets and valve springs

 

[Ian M]

Cool I'll tag along and watch this one. 

 

[Guest]

This if a fun little build made one up for one of my sons. that is right into cars when all up and running it is really effective

 

[monica]

this will be an interesting build,Paul,like how it has lights and sound,

 

[PaulTRose]

piston and con rods attached to the crank

and in the block

 

[rickoshea52]

A few years ago I asked my wife what she would like for Christmas, "A VW air cooled engine to tinker with." was her response (she's a diesel fitter). Not having the cash for the real thing this Airfix kit was a cheaper alternative, it's still in the box unopened.

 

[PaulTRose]

to be honest i think i could have put this all together in 90 minutes but im enjoying it so much im going slow


cylinder head........valves are in, cam shaft and rocker arms fitted

 

[Guest]

Very cool Paul

 

[PaulTRose]

head attached to the block........rocker cover on the head.........timing belt on and cover over it all......starting to look like an engine now..........its an 'old fashioned' engine cos that grey thing on the right is the dizzy 

 

[monica]

looking good Paul,will you be making a video,of it running ?  9_9

 

[PaulTRose]

looking good Paul,will you be making a video,of it running ?  9_9

Thats the plan 

 

[PaulTRose]

water pump on, fan and belt on, 'starter motor' on

the end is in sight, not much more to do

 

[papa 695]

Looking good Paul.

 

[Gwyn]

Well done that looks a great little project to do with the grandchildren whilst explaining how it works.

 

[PaulTRose]

and finished........more pics in the finished thread

 

[flyjoe180]

Just seen the completed build and video Paul, now you can educate the lecturer