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Author Topic:   MIRAGE v. MIRAGEplus

TransAm posted 05-29-2008 07:37 AM ET (US)
I have found a pair of Quicksilver Mirage propellers (23P) really cheap that I am considering for a back up set; I don't know how old they are, but [they are] definitely not [the] newer MIRAGEplus propellers. I believe the newer MIRAGEplus propeller has more cupping. Will [the engine speed in] RPM differ more than something negligible between the old and new propeller? If so, how so?
jimh posted 05-29-2008 09:02 AM ET (US)
The rule of thumb for cupping is to consider that it adds one inch of pitch. Using another rule of thumb, one inch of pitch ought to account for about 200-RPM change. If two propellers are similar and differ only in the amount of cupping, this seems to imply their engine speed results would be similar, perhaps less than 200-RPM difference.
TransAm posted 05-29-2008 09:10 AM ET (US)
Sounds like I need to just give them a try and see what happens. Can't go wrong for $150 for both.
Tom W Clark posted 05-29-2008 09:15 AM ET (US)
Expect about 200 more RPM with the MIRAGE props.
The difference in design between the MIRAGE and the MIRAGEplus is essentially the amount of cupping, that is all.
Of course all MIRAGEplus props have the Flo-Torq hub bore while all MIRAGE prop has the pressed-in rubber hubs (except the solid hub models)These propellers have part numbers with the A40 or A41 suffix.
Early MIRAGEplus's with the A45 suffix indicate Flo-Torq hubs without PVS vent holes. A46 suffix models are Flo-Torq with PVS vent holes.
I think you would be better served by a pair of 25" MIRAGE props, instead of the 23". They may well be faster than the MIRAGEplus too. Remember that part of a typical "labbing" job is the removal of some of a propeller's cupping.
TransAm posted 05-29-2008 12:16 PM ET (US)
Thanks Tom, I will keep that in mind as I continue to search for the absolute best set of #1 Props. Right now, I am anxious to see how some REV 4's you suggested earlier preform. I do think I need some additional grip at high speed. Right now, my Yamaha props are not cutting it at 60+ MPH.

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Author	Topic: MIRAGE v. MIRAGEplus
TransAm	posted 05-29-2008 07:37 AM ET (US) I have found a pair of Quicksilver Mirage propellers (23P) really cheap that I am considering for a back up set; I don't know how old they are, but [they are] definitely not [the] newer MIRAGEplus propellers. I believe the newer MIRAGEplus propeller has more cupping. Will [the engine speed in] RPM differ more than something negligible between the old and new propeller? If so, how so?
jimh	posted 05-29-2008 09:02 AM ET (US) The rule of thumb for cupping is to consider that it adds one inch of pitch. Using another rule of thumb, one inch of pitch ought to account for about 200-RPM change. If two propellers are similar and differ only in the amount of cupping, this seems to imply their engine speed results would be similar, perhaps less than 200-RPM difference.
TransAm	posted 05-29-2008 09:10 AM ET (US) Sounds like I need to just give them a try and see what happens. Can't go wrong for $150 for both.
Tom W Clark	posted 05-29-2008 09:15 AM ET (US) Expect about 200 more RPM with the MIRAGE props. The difference in design between the MIRAGE and the MIRAGEplus is essentially the amount of cupping, that is all. Of course all MIRAGEplus props have the Flo-Torq hub bore while all MIRAGE prop has the pressed-in rubber hubs (except the solid hub models)These propellers have part numbers with the A40 or A41 suffix. Early MIRAGEplus's with the A45 suffix indicate Flo-Torq hubs without PVS vent holes. A46 suffix models are Flo-Torq with PVS vent holes. I think you would be better served by a pair of 25" MIRAGE props, instead of the 23". They may well be faster than the MIRAGEplus too. Remember that part of a typical "labbing" job is the removal of some of a propeller's cupping.
TransAm	posted 05-29-2008 12:16 PM ET (US) Thanks Tom, I will keep that in mind as I continue to search for the absolute best set of #1 Props. Right now, I am anxious to see how some REV 4's you suggested earlier preform. I do think I need some additional grip at high speed. Right now, my Yamaha props are not cutting it at 60+ MPH.