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mc_mc
Hero Steamer
Joined: 13 Jan 2007
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Location: Milton Keynes
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 Posted: Fri Feb 16, 2007 5:40 pm Post subject: |
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| Great stuff lewis, keep up the good work. |
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Lewis
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Joined: 26 Jun 2006
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Location: Chesterfield Derbyshire
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Mamodman123
Steam God!
Joined: 19 Jul 2006
Posts: 31793
Location: Midlands, UK
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| Posted: Fri Feb 16, 2007 6:31 pm Post subject: |
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| lewisop1991 wrote: | it really can there may be luittle differences mm betweeen the 2 models amount of lube used and tightness of all the bearings pin ect and how well run in they are
mine has a screw in engine frame not a rivet too and screw sightglass |
I oil everything, these are minor differences Lewis, i'm just trying to figure out how you get 1200 more rpm  . My model has been run loads its older than yours 
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Lewis
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Mamodman123
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Joined: 19 Jul 2006
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| Posted: Fri Feb 16, 2007 6:48 pm Post subject: |
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| lewisop1991 wrote: | maybe mines a mahood 2
i have no idea mate but the pressure was so high 
i have no idea why mate my have been made better or somit really no idea |
Well i'm stumped, however you managed it...well done
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Lewis
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mj
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| Posted: Fri Feb 16, 2007 6:53 pm Post subject: |
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| Mamodman123 wrote: | | lewisop1991 wrote: | it really can there may be luittle differences mm betweeen the 2 models amount of lube used and tightness of all the bearings pin ect and how well run in they are
mine has a screw in engine frame not a rivet too and screw sightglass |
I oil everything, these are minor differences Lewis, i'm just trying to figure out how you get 1200 more rpm . My model has been run loads its older than yours |
try viagra on the piston to make it a better seal |
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Sandman
Steam Supreme Being
Joined: 19 Jul 2006
Posts: 8795
Location: Ayrshire Scotland
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| Posted: Fri Feb 16, 2007 10:09 pm Post subject: |
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| mj wrote: | | Mamodman123 wrote: | | lewisop1991 wrote: | it really can there may be luittle differences mm betweeen the 2 models amount of lube used and tightness of all the bearings pin ect and how well run in they are
mine has a screw in engine frame not a rivet too and screw sightglass |
I oil everything, these are minor differences Lewis, i'm just trying to figure out how you get 1200 more rpm . My model has been run loads its older than yours |
try viagra on the piston to make it a better seal |
That would make it Harder to measure.
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James
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| Posted: Fri Feb 16, 2007 10:23 pm Post subject: |
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LMFAO!
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Wallace
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Joined: 19 Jul 2006
Posts: 11349
Location: New South Wales, Australia
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| Posted: Sat Feb 17, 2007 1:22 am Post subject: |
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GREAT STUFF LEWIS
I think a variation of 500-1000rpm between the same type engines can be expected.
I could imagine too that a MEC1 has a good chance at higher RPM due to lack of exhaust piping.
I'm not feeling too mathematical at the moment so can't work out how much 500rpm is over one second? Very roughly 10rpm?
Anyway I think the following could make fairly noticeable differences in RPM's.
* Amount of oil. I know dripping too much oil on my engines when running causes them too slow.
* Ambient temperature.
* Oil thickness
* Sideways play in the flywheel axle. Too much play can cause engine to vibrate, lowering RPM. My MEC1 kept revving right up, then would vibrate, lower RPM, then rev up etc etc. Washers put in as spacers could help.
* Overall vibration in the engine. My SE3 is the only engine that will run decently without being screwed down. Even so, holding it down it increase the RPM.
There'd be others too, obvious and not so obvious.
I guess in the end, RPM check them as you would normally run them, or do your best to get peak power. I'm going to experiment with the SE3.
As a point of interest, horsepower/torque and RPM checks on cars are done at peaks. Even if it's only for a few seconds.
But tony made a good point to try note both constant and peak. As long as peak isn't ridiculously high due to errors
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SPOKESMAN
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| Posted: Sat Feb 17, 2007 7:43 am Post subject: |
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| Sandman wrote: | | mj wrote: | | Mamodman123 wrote: | | lewisop1991 wrote: | it really can there may be luittle differences mm betweeen the 2 models amount of lube used and tightness of all the bearings pin ect and how well run in they are
mine has a screw in engine frame not a rivet too and screw sightglass |
I oil everything, these are minor differences Lewis, i'm just trying to figure out how you get 1200 more rpm . My model has been run loads its older than yours |
try viagra on the piston to make it a better seal |
That would make it Harder to measure. |
Lewis is certainly providing some stiff competition. |
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Lewis
Steam Legend!!
Joined: 26 Jun 2006
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Lewis
Steam Legend!!
Joined: 26 Jun 2006
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Location: Chesterfield Derbyshire
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Lewis
Steam Legend!!
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oldstuff
Steam Legend!!
Joined: 31 Oct 2006
Posts: 2530
Location: Detroit, Michigan, U.S.A.
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| Posted: Sat Feb 17, 2007 8:49 pm Post subject: |
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| lewisop1991 wrote: | | it happened mm i swear all i did was tighten the cylinder to the frame so it was max because it blowing ofall the time and replaced the seal a few days ago and it was super steam tight it happened mate and it is well run in |
I think tightening the trunion screw was key, Lewis...I've seen my engines pick
up speed when I did that, but it required more fire and pressure. I'm sure you
realize these toy boilers can reach the failure point. Good thing there's safety
valves...just be careful, mate.
| lewisop1991 wrote: | well the fastest so far is my sp2 with a peak speed of 3437 RPM  MM just wont believe it |
I don't think it's personal, Lewis. I got the same kind of grief from MM when I posted
my duration runs. I'm sure he'll eventually learn how to go about understanding the
extraordinary in a way that doesn't seem to be an attack on another's credibility.
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