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Engine complexities

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Priyank View Drop Down
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    Posted: Jan/08/2012 at 9:48am
Hey !
I was going through a design report by UTC, and they assumed the engine (BnS) developed the 10 HP power peak at the governed 3750 RPM.

Well, as far as my knowledge goes, 
An engine develops max power at it's highest RPM, and I've seen my engine going as high as 5500 RPM.

So, what's the deal...who's wrong ?


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Post Options Post Options   Thanks (0) Thanks(0)   Quote ErikHardy Quote  Post ReplyReply Direct Link To This Post Posted: Jan/08/2012 at 11:22am

I've seen my briggs at 7200 rpm... thats a lot of horses! But I think I've seen something in the rules about this...

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Priyank Quote  Post ReplyReply Direct Link To This Post Posted: Jan/08/2012 at 11:24am
So 5500 wasn't peak either...gosh !! 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ErikHardy Quote  Post ReplyReply Direct Link To This Post Posted: Jan/08/2012 at 11:45am
Correct, you need forced induction!
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Priyank View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Priyank Quote  Post ReplyReply Direct Link To This Post Posted: Jan/08/2012 at 11:45am
But my question stands...
When does BnS deliver top HP ?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ErikHardy Quote  Post ReplyReply Direct Link To This Post Posted: Jan/08/2012 at 11:51am
Open the Rules and read every word of it. Then reread it again. It tells you max HP!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Priyank Quote  Post ReplyReply Direct Link To This Post Posted: Jan/08/2012 at 12:15pm
Oh you mean the power-rpm curves ?
Correct, yea that's where i should look..!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ffriolet Quote  Post ReplyReply Direct Link To This Post Posted: Jan/08/2012 at 6:14pm
Originally posted by 
B2.5.14  B2.5.14  wrote:

Engine Governor
Each engine is equipped with a governor. Each governor will be set at competition to a 3,800 rpm or lower maximum speed. Random inspection of the governor may be conducted at any time. Any attempt to defeat the engine governor so as to increase the engine speed is grounds for is grounds for immediate disqualification. Random inspection of the governor may be conducted at any time.
GOVERNOR SETTING NOT TO EXCEED 3800 RPM.
The governor operation must remain free of obstructions at all times. Governor area must be shielded from debris. The stock configuration of fuel tank mounted to the engine is acceptable for debris management. However, if the fuel tank is to be remote mounted, a debris shield covering the exposed governor area is required. Briggs & Stratton part number 697326 Control Cover may be used or some other part with equivalent features.
NOTE: The governor spring must be placed in hole #6.


Edited by ffriolet - Jan/08/2012 at 6:14pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote BadgerMilk Quote  Post ReplyReply Direct Link To This Post Posted: Jan/12/2012 at 2:18pm




Published (and probably predicted) data from the official SAE forums (http://forums.sae.org).  If anyone has done actual dyno testing to back this up, that would be neat.  To my knowledge, nobody is sharing the infos if they have.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote collinskl1 Quote  Post ReplyReply Direct Link To This Post Posted: Jan/12/2012 at 2:52pm
Briggs power numbers have been covered in many threads on this forum...
 
 
 
I specifically left out one (blueprinting) but if you really want to read it, you can use the mystical search button.
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... and the 8th simple machine: a bigger hammer.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ErikHardy Quote  Post ReplyReply Direct Link To This Post Posted: Jan/12/2012 at 7:02pm
Ahhh...  Blueprinting That was an excellent threadTongue
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Post Options Post Options   Thanks (0) Thanks(0)   Quote BadgerMilk Quote  Post ReplyReply Direct Link To This Post Posted: Jan/20/2012 at 3:03pm
Originally posted by collinskl1 collinskl1 wrote:

Briggs power numbers have been covered in many threads on this forum...
 
 
 
I specifically left out one (blueprinting) but if you really want to read it, you can use the mystical search button.


I forgot to link back to those in my post above - that's where I got the links.  Whoops.
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