WHAT GOVERNOR DO I NEED?
The basic question is what kind of governor will fit the particular application. Here you will find short explanation what is necessary to know in order to define the right governor and form which you can send to us so that our designers can determine the right governor type.
Any particular governor version has it’s particular installation specification which defines governor design and setting. Governor setting is designed by governor manufacturer according to installation specification.
Generally the most important data which determines governor setting are:
JIHOSTROJ GOVERNOR IS THE ONLY GOVERNOR THAT FITS SMOOTHLY TO NEW ENGINE ROTAX 912 iS
Governor drive rotationGovernor drive rotation is determined by engine design. Lycomings and Continentals have CW rotation (facing engine pad), Rotax engines have CCW rotation (facing engine pad).
Propeller type determines governor action - pressure to increase pitch (uncounterweighted propellers) or pressure to decrease pitch (counterweighted propellers).
Governor rotation and pressure to increase or decrease governor action is defined by internal governor arrangement and can’t be changed without rebuilding of the governor at the manufacturer or Authorized Service Centre.
Maximum governor drive RPM
Maximum governor drive RPM is defined by propeller maximum RPM and gear ratio between the propeller shaft and governor drive. This value is then assured with a particular speeder spring which influences in certain margin governor’s dynamic behavior as well. In operation is permitted to adjust maximum RPM in certain margin according to procedure stated in OPERATION AND INSTALATION MANUAL. More important changes in maximum RPM can´t be done without retrofit of speeder spring.
Consult aircraft, propeller or engine manuals for applicable information.
Relief valve pressure
Relief valve setting is defined by maximum permissible pressure which can be applied to a particular propeller hub. This pressure is set by governor manufacturer or Authorized Service Centre and must not be adjusted into operation! The majority of propellers is using 320 PSI relief valve pressure adjustment. But other settings can exist!
Consult aircraft or, propeller manuals for applicable information.
You have two basic methods how to tell us what governor you need:
- You know another governor which fits your application.
If you will retrofit old governor or you know that your engine and propeller combination fits certain governor, let us know this model.
- You don’t know any governor which fits your application.
At this case you have to provide us with the basic information as described above. For this purpose, please use this simple form.
For you convenience consult the Table No. 1 where you will find the most common governor designs and settings. The US version of JIHOSTROJ governor is PCU5000. More details here.
|Governor/Mode||Engine/Model||Rotation (facing engine pad)||Governor Design||Propeller/RPM(Drive/Ratio)||Governor RPM||Relief Valve Pressure(PSI)|
|Rotax||THE ONLY GOV||THAT||FITS SMOOTHLY||the new engine||Rotax 912 iS|
|P-110-029/A||ROTAX912||CCW||INCREASE||1950 (0,58 to 1)||3364||330|
|P-110-030/A||ROTAX912S /914||CCW||INCREASE||1700(0,5428 to 1)3148||330|
|P-920-017/A||LycomingIO-540(Narrow Deck)||CW||INCREASE||2700(0,895 to 1)||2420||320|
|P-940-017/A Counterweighted||Lycoming AEIO360||CW||DECREASE||2700(0,895 to 1)||2420||320|
|P-920-032/A||Lycoming IO-360||CW||INCREASE||2700(0,867 to 1||2340||320|
|P-920-033/A||Lycoming IO-540(Wide Deck)||CW||INCREASE||2700(0,947 to 1)||2557||320|
|P-920-050/A Readjustable Universal||Lycoming||CW||INCREASE||2700(0,895 to 1or 0,866 to 1or …)||2420 Readjustability from 2340 to 2700RPM||320|
|P-920-028/A High pressure||Lycoming IO360IO-320||CW||INCREASE||2700(0,867 to 1)||2340||475|
Teledyne Continental Motors
|P-920-023/A||TCM||CW||INCREASE||2800(1 to 1)||2800||320|
|P-920-057/A||TCM||CW||INCREASE||2700(1 to 1)||2700||320|
NOTE: The information in this table is intended for general reference use only - without commitment to advise modifications. For maximum RPM and drive ratio, please consult operation manual of your engine.
If any question exists, please contact us.
SO THAT WE CAN GET ALL TECH INFO WE NEED,
please fill in the form (Move cursor to picture, click right button, click left button "Save picture as", then open at any Picture Manager software, fill in and send as an attachment to e-mail address).
Based on this information we will determin proper JIHOSTROJ governor type and send you other necessary information concerning purchase.