gmcjetpilot
Well Known Member
I was looking for the aluminum Hartzell limitations (RPM/MAP) for different prop hub/blade models and engine combos, and found this link. The Vans section starts at Chapter is 61-02-59, page 1423 (PDF number) to 1442.
http://hartzellprop.com//services/product-support-library/manuals/application-guide/
Direct Link to PDF.
https://hartzellprop.com/wp-content/uploads/159-0000-WA.pdf
I called Hartzell and asked them a few questions. The main take away is to keep in mind some prop (hub/blade) models and engine models with electronic ignition have not been tested. For those who remember before the BA prop came out Hartzell tested their standard CS prop for 180 HP Lycs (HC-C2YK-1BF/7666-2) with electronic ignitions and found some undesirable vibrations at certain RPM/MAP settings and set a life limit. That lead to the BA 7496 prop. It was better but still had some RPM/MAP limits on non-dampened cranks. Than the BA 7497 blade came out with no restrictions. Keep in mind that not all engines have been tested with electronic ignitions of every possible combinations. If in doubt call Hartzell.
Any one want to chime in with trivia and fun facts. Does anyone have any direct comparison of the BA 7496 vs BA 7497 performance?
http://hartzellprop.com//services/product-support-library/manuals/application-guide/
Direct Link to PDF.
https://hartzellprop.com/wp-content/uploads/159-0000-WA.pdf
I called Hartzell and asked them a few questions. The main take away is to keep in mind some prop (hub/blade) models and engine models with electronic ignition have not been tested. For those who remember before the BA prop came out Hartzell tested their standard CS prop for 180 HP Lycs (HC-C2YK-1BF/7666-2) with electronic ignitions and found some undesirable vibrations at certain RPM/MAP settings and set a life limit. That lead to the BA 7496 prop. It was better but still had some RPM/MAP limits on non-dampened cranks. Than the BA 7497 blade came out with no restrictions. Keep in mind that not all engines have been tested with electronic ignitions of every possible combinations. If in doubt call Hartzell.
Any one want to chime in with trivia and fun facts. Does anyone have any direct comparison of the BA 7496 vs BA 7497 performance?
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