bigcol Posted October 21, 2019 Report Share Posted October 21, 2019 It seems that now the Beta engine is installed and running. the prop L/R hand, is opposite to the 260 gear box. beta have confirm that the forward and reverse can be switched round just by changing the linkage on the control lever. the above seems strange to me, cheaper that changing the prop, or gear box lol any tech information would be gratefully received. thankyou in advance col Link to comment Share on other sites More sharing options...
mrsmelly Posted October 21, 2019 Report Share Posted October 21, 2019 Its that way with most gearboxes, they are a standard box for both left and right hand props it makes sense. We had one spare with the Princess that we could use on either engine wether the left or right hand prop was connected. Link to comment Share on other sites More sharing options...
Alan de Enfield Posted October 21, 2019 Report Share Posted October 21, 2019 35 minutes ago, bigcol said: It seems that now the Beta engine is installed and running. the prop L/R hand, is opposite to the 260 gear box. beta have confirm that the forward and reverse can be switched round just by changing the linkage on the control lever. the above seems strange to me, cheaper that changing the prop, or gear box lol any tech information would be gratefully received. thankyou in advance col My PRM workshop manual : The pictures have not copied and the forum does not allows Pdf's to be attached. Link to comment Share on other sites More sharing options...
Tony Brooks Posted October 22, 2019 Report Share Posted October 22, 2019 11 hours ago, bigcol said: It seems that now the Beta engine is installed and running. the prop L/R hand, is opposite to the 260 gear box. beta have confirm that the forward and reverse can be switched round just by changing the linkage on the control lever. the above seems strange to me, cheaper that changing the prop, or gear box lol any tech information would be gratefully received. thankyou in advance col The problem with running many older designs of gearbox in reverse was that ahead just revolved a a great lump of mechanism carried on ball bearing while reverse used sun and planet gears running on plain bearings for reverse. The lubrication of the planet wheels tended to be suspect and there were several gears so if run for long periods in reverse the wear and gear noise was excessive. Hence the need for handed gearboxes or reduction boxes. The hydraulic PRMs are a very different beast using single helical gears all of which run on ball or roller bearings with no sun or planet gears. In fact they are much like a cut down car gearbox mechanism inside. Lubrication is not such an important point so splash from the gears does nicely. he only thing about running what is nominally reverse as ahead gear is that the nominal reverse uses a small idler gear and that means slightly different sized main gears when compared with the nominal ahead ones. This results in a small difference between the nominal shed and nominal astern reduction ratios. I doubt you will notice the diffidence PRM are correct, just change the gear linkage in the Morse control to the other side of the spindle.. Link to comment Share on other sites More sharing options...
bigcol Posted October 23, 2019 Author Report Share Posted October 23, 2019 Many thanks all feel better col Link to comment Share on other sites More sharing options...
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