Rap 24 hp semidiesel, first start attempt in 20 years.
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- เผยแพร่เมื่อ 30 ธ.ค. 2008
- This engine was built in 1930 or earlier. Have been stored outdoors for the last 20 years. After spending hours getting all parts movable this is the first start attempt. Seems to be low start pressure (6.5 bar) and low capacity in start air hose that is the biggest problem.
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@schlusselmensch Yes. The capture tube supplies oil to the connecting rod bearing only. There are two channels on the lubricating device to supply oil to each main bearing. The excess oil from these bearings and also cylinder lubrication all ends up in the crankcase and will sooner or later be burnt, a drop or two every now and then...
@MikeAdorff To get the engine turning, first the flywheel need to be set in a position where the piston is slightly past top dead centre (when the piston is at the highest point). Then compressed air is fed thru the startvalve into the cylinder pushing the piston down. To get the flywheel spinning as fast as possible, there have to be enough air at a high enough pressure. In this case, the pressure is too low. Normal start air pressure would be something like 12-30 bar.
Storartet Svein!!
Jeg venter spent på fortsettelsen!
Godt nytt år forresten :-)
could be a heck of a knuckle buster if it fired while moving it over TDEC with the pipe!great fun thoughtwell done guys!
@schlusselmensch There are a few different variations of the crank bearing lubrication on the different brands of semi-diesel engines. Some have direct lubrication of the crank bearing and the surplus in the sump blow back to the lubricating device. In Rap, oil is added in the crankcase and the level must be so high that a capture tube is picking up oil to the crank bearing. Excess oil follow the flushing air and is burned. This will normally hardly be noticed under normal operating conditions.
24 hp 50969596759695 pounds of torque
Wow 8:25 it couldn't quite fire over top centre. These 2 strokes can run either direction and can be bounced backward as the starting procedure where less effort is needed than full revolutions. Yes this one is air start with manual timing. A 'tractor-start' may have tipped it over before it would revolve? What a GIANT SINGLE 2 STROKE! Amazing.
@jayurish And of course everyone has a tractor and a belt drive available to them. You were so smart two years ago. Wow!
@marcvie9 These kind of engines were widely used for ship propulsion for many decades in the last century.
Same exact engine my father has in his boat, i think he uses 15-16 bar starting pressure, but it starts with as low as 6-7 bar. We have even started it by hand a few times. However after this many failed attempts you should check the crankcase and empty it or else it will run off when it finally starts.
it did! it's in the next video!
@SveinHaDD I see, so if the oil level is too high, the rod assembly will throw up enough that the engine will run on it instead of just injection oil? This capture tube supplies the main bearings or is it for the crankshaft big end bearing?
That would make an awesome cabbage cannon !
perfect landini style! XD
was the flywheel even making full rotations when it was running? it looked like it just went clockwise, counter clockwise, clockwise, etc...
Do you know the history of this gem?
are they using an air compressor to start it?
I am NOT an expert:
Could you please explain: What does that mean: low capacity in start air hos
Is it started my compressed air?
@ak7wyf thanks, I zipped it forward and, yep you are right.
Some time ago you mentioned that the oil level in the crankcase was too high, causing the engine to run away. There is little information on Rapps here in North America, how is the combustion chamber isolated from the lubricating supply when the level is normal? It must be quite different from many 2 stroke hot bulb engines that almost universally had a scavenging pump or valve to evacuate excess oil from the crankcase. Any other Rapp experts know the answer?
Seems to be a little advanced or not enough compression, maybe a air leak, keep trying you will work it out. .don't give up..
Reheat the glow plug after 3-4 min ,smiles . and yes I agree on first start after 20 yrs ...hook a tractor belt to it .
get rings loosened ....oil all in strange places and then she'll kick on first air hit.
(Me thinks there is a pride thing going here ,like i'm gonna start this thing ,especially with a camera on me or die trying ,lol ) ...been there done that..lollllllllll
8:24 it turns washing machine
wow you could really throw out you shoulder trying to start that thing!!!!
was a difficult operation
what was it used for???
A lot of the3se engines was used in fishing and cargo boats up to the 1990's There are still some ov them running here at the Norwegian coast
OK 👍
cool
Does it start on compressed air?
Yes. We had about 6-7 bar but normally the starting pressure should be 10-12 bar or at least in that range.
It has a belt pully.. I would have just got a tractor with a pully and belted it...
Looks like too much priming is the problem apart from low volume of starting air !!
А где используются такие двигатели?
В европейских. Изпользовать в заводе. Например швейная, токарь,.... Это 1910 до 1930 примерно точно не знаю.
@thewelford If that were teh case it would have been extremely taxing lol
0:34, push it over with your foot, Then oops his and slips and the thing fires!! BOOMMM!!! next thing you know is that your leg is busted to pieces and your at Commercial airline altitude..that would suck.
He uses a blowtortch too heat up the glow plug. Its a old disel engine it dont eletric heat.
out !
dangers that fuel gas tanks ea
prime it more
hi
@Ghstwn Because there will always be some idiots watching it and make stupid comments :-(
Probably powered a smaller boat.
These engines was used in pretty big boats.... The torque is pretty ekstreme, and a engine like this have a volume arround 30 litres.
Max RPM was 250-400
Norway and Sweden had a lot of engines like this produced, and the latest delivered was a Brunvoll from the west of norway delivered in 1978 if i remember right..
So boring, nothing actually happens