Model B And Pm3

[[old] John Rupp]

Jon,<br /><br />There is some light rust on the perforated metal air intake on my model C.<br /><br />Other than wiping it lightly with some mineral oil, is there anything else that can be done to remedy the rusting?<br /><br />Thanks.

[[old] c2jonw]

<!--QuoteBegin-John Rupp+Jan 20 2006, 02:08 AM--><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td><div class='genmed'><b>QUOTE(John Rupp @ Jan 20 2006, 02:08 AM)</b></div></td></tr><tr><td class='quote'><!--QuoteEBegin-->Jon,<br /><br />There is some light rust on the perforated metal air intake on my model C.<br /><br />Other than wiping it lightly with some mineral oil, is there anything else that can be done to remedy the rusting?<br /><br />Thanks. <br /> </td></tr></table><br /><br />John- The oil should help, or you could try disassembling, thoroughly cleaning and applying a coat or two of car wax to it. Light coats though, so you don't plug up the holes. If it gets really bad, I think we still have some stainless C perfs. They were pricey, but for really corrosive environments they worked well......JonW

[[old] John Rupp]

Thanks.

[[old] rspenger]

<!--QuoteBegin-c2jonw+Jan 19 2006, 07:04 PM--><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td><div class='genmed'><b>QUOTE(c2jonw @ Jan 19 2006, 07:04 PM)</b></div></td></tr><tr><td class='quote'><!--QuoteEBegin-->Hi BobS,    Increased air temperature and lower air pressure (as a result of elevation or weather conditions) will have the same effect on drag factor as closing the damper down. DF is a numerical representation of how quickly the flywheel is decelerating. The quicker the deceleration, the bigger the DF.....JonW <br /> </td></tr></table><br /><br />Thanks, Jon.<br /><br />It makes sense that lower air density (from either factor) would result in lower drag, but I was surprised to find that a temperature change of just a few degrees could produce a change of 20 in the DF. Has C2 done any quantitative measurements on the effect of air density on drag factor? I am also curious as to whether it is strictly air density or if temperature and pressure changes have different effects if the air density is held constant.<br /><br />regards,<br /><br /><br />Bob S.

[[old] c2jonw]

Thanks, Jon.<br /><br />It makes sense that lower air density (from either factor) would result in lower drag, but I was surprised to find that a temperature change of just a few degrees could produce a change of 20 in the DF. Has C2 done any quantitative measurements on the effect of air density on drag factor? I am also curious as to whether it is strictly air density or if temperature and pressure changes have different effects if the air density is held constant.<br /><br />regards,<br /><br /><br />Bob S. <br />[/quote]<br /><br /><br />Hi Bob- We have not undertaken any quantitative studies of this. Theoretically speaking, air density might be the only factor that matters. Where are those grad students when you need them? JonW

[[old] ebolton]

[quote=c2jonw,Jan 20 2006, 07:44 AM]<br />Thanks, Jon.<br /><br />It makes sense that lower air density (from either factor) would result in lower drag, but I was surprised to find that a temperature change of just a few degrees could produce a change of 20 in the DF. Has C2 done any quantitative measurements on the effect of air density on drag factor? I am also curious as to whether it is strictly air density or if temperature and pressure changes have different effects if the air density is held constant.<br /><br />regards,<br /><br /><br />Bob S. <br />[/quote]<br /><br /><br />Hi Bob- We have not undertaken any quantitative studies of this. Theoretically speaking, air density might be the only factor that matters. Where are those grad students when you need them? JonW <br />[/quote]<br /><br />Air density is all that matters. The density itself is a function of temperature, humidity, and pressure.<br /><br />Ed

[[old] shorttrack]

I bought my B last month and retrofitted to a PM3.I added baffles to the cage to better control the DG and the machine runs alot quietly now.<br /><br />I am presently adding a arm to the pm3.It's hard to reach the panel.As soon as am I finish I'll post the pictures.<br /><br />Hold on to the B.It's a great machine! Was I ever lucky I came across mine. <br /><br /><br /><br /><!--QuoteBegin-Spectre+Jan 17 2006, 02:28 AM--><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td><div class='genmed'><b>QUOTE(Spectre @ Jan 17 2006, 02:28 AM)</b></div></td></tr><tr><td class='quote'><!--QuoteEBegin-->Has anyone switched over to a PM3 for  their "B".  I have had this machine since I was 16 (I am 35 now) and hate to part with a working erg if I can just update the PM.  The erg itself works great I am just tired of rolling over at 9999 ms.  Does the mount allow you to tilt the PM like on the "C" and "D"?  <br /><br />Thanks <br /> </td></tr></table><br />

[[old] JohnnyP]

This is all really interesting, we have six B's at my rowing club and I have tried to find out about DFs etc compared to C's & D's on the UK forum with no luck. IS the DF reading from a PM2 accurate on a B then? I knew that they were very heavy machines but I thought that the readings on the ones with PM2's were still on the high side. <br />I'll take on board the advice on cogs and closing of the cages, Thanks.

[[old] John Rupp]

<!--QuoteBegin-JohnnyP+Jan 25 2006, 05:08 AM--><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td><div class='genmed'><b>QUOTE(JohnnyP @ Jan 25 2006, 05:08 AM)</b></div></td></tr><tr><td class='quote'><!--QuoteEBegin-->This is all really interesting, we have six B's at my rowing club and I have tried to find out about DFs etc compared to C's & D's on the UK forum with no luck.  IS the DF reading from a PM2 accurate on a B then? </td></tr></table><br />Yes the DF reading is accurate, but the resistance at a given DF on the B is different than the resistance on a C or D, because of the different number of teeth on the cogwheels.<br /><br />See my earlier messages on this thread.

[[old] c2jonw]

<!--QuoteBegin-JohnnyP+Jan 25 2006, 01:08 PM--><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td><div class='genmed'><b>QUOTE(JohnnyP @ Jan 25 2006, 01:08 PM)</b></div></td></tr><tr><td class='quote'><!--QuoteEBegin-->This is all really interesting, we have six B's at my rowing club and I have tried to find out about DFs etc compared to C's & D's on the UK forum with no luck. IS the DF reading from a PM2 accurate on a B then? I knew that they were very heavy machines but I thought that the readings on the ones with PM2's were still on the high side. <br />I'll take on board the advice on cogs and closing of the cages, Thanks. <br /> </td></tr></table><br /><br /><br />Johnny,<br /><br />check out the following from our website:<br /><a href='http://www.concept2.com/05/rower/servic ... et0304.pdf' target='_blank'>http://www.concept2.com/05/rower/servic ... pdf</a><br /><br />JonW

[[old] marcjj]

[FONT=Geneva]Hi I'm a new rower and new to the forum. I have just bought a model b and I as wondering if there are any lists of comprehensive upgrades that you can make to one. Specifically I would like a little more resistance than the standard rower provides. Thanks.

[[old] John Rupp]

Put the chain on the small cogwheel and leave the damper open.<br /><br />That will give you the highest resistance.