model engines

Forum Moderator Joined: 18 Feb 2004 Posts: 7432

ok now i think i really must be upgraded to ultrahero. Smile

heres some pics of a 1cc compression ignition engine that i started making at school when i was 17. All machined from bar stock. Still needs a hardened and honed liner, piston and crank, which the school did not have the facilities to do. Will finish it one day!

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

prop starter thingy.

How do you start your plane engines? The spin the prop with your finger ot do you use the girly leccy starter on the nose?

Mr Quoter-vator Joined: 16 Feb 2004 Posts: 7405

either ripcord or leccy thingy....

Site Subscriber Joined: 10 Jun 2004 Posts: 2317

Finger...and yes it does hurt when you dont move it away quick enough Razz

Mr Quoter-vator Joined: 16 Feb 2004 Posts: 7405

suppose i was thinkin of cars where u cant get ur finger on anything...

i got a little nitor engine i should "rebuild" lol....wanted to put it on a model speedboat...wud be fun as it is a fast little motor...

how do i find out what size/spec it is?

Forum Moderator Joined: 16 Feb 2004 Posts: 1356

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

theres a nice cheap model

Forum Moderator Joined: 16 Feb 2004 Posts: 1356

I know what santa is bringing

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

pain?

Forum Moderator Joined: 16 Feb 2004 Posts: 1356

No. Wish could get one of those working models! Or a clear bottom end rotating model would be good..

Mr Quoter-vator Joined: 16 Feb 2004 Posts: 7405

that pic there...isnt that theplastic one that u just turn by hand...thats the one i want...or similar...

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

yes JB its plastic and the handle kinda gives away that its hand powered.

Forum Moderator Joined: 18 Feb 2004 Posts: 7432

thats the one i had! except mine was electric, driven by the 'starter' motor. Mine had little tiny light bulbs for the spark plugs as well, all driven off the little distributor. These would 'spark' at the correct time and eveything!

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

but would it pull 8 grand?

Anyway looks cool, I fancy getting a model now.

Forum Moderator Joined: 18 Feb 2004 Posts: 7432

Chris H wrote:

How do you start your plane engines? The spin the prop with your finger ot do you use the girly leccy starter on the nose?

I hand start it every time. firstly because its macho Smile

, and secondly for the principle of it. If you have to use a starter then you havent set it up properly. If its primed properly and theres a glow, it WILL fire at least a couple of times, even if it doesnt continue running.

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

thats why i said girly leccy starter.

i used to use my fingers as well.

Cars were either pull cord or give it a shove.

Mr Quoter-vator Joined: 16 Feb 2004 Posts: 7405

cant shove a car, at least not the ones ive seen, as they have a centrifugal clutch so the wheels wont drive the engine, only the other way round,

Forum Moderator Joined: 18 Feb 2004 Posts: 7432

yeah but on a lot of them, the flywheel is knurled on the outside edge, this pokes through a slot in the chassis bottom. You get a rubber donut thing that you put around the end of an aeroplane starter and press this against the flywheel to turn it over. A lot of people rig up a little box thing with the starter and battery all mounted in it so they just position the car on top, press it down, and the starter comes on and does the biz.

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

fancy, I just shoved it along a bit of wood, turned the flywheel that way.

Centrifugal clutches, great for rc cars crap on real cars, anyone ever driven an early saab 96 thingy with the V4 will know all about it. Zero engine braking

Retroholic Joined: 12 Feb 2004 Posts: 5685

This ones mine, sounds like what you were talkin about neal. Can be bought from renault but i forget the part number

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

what engine is that supposed to be? I can se several fundamanetla flaws in it which are not conductive to efficient runnign if it were real. Like a water pump on the head.