A pressure nipple was set on ENYA 45 CXL with the same manner as ENYA SS 35. Fully disassembled as usual and the crank shaft on intake port was engraved to establish adequate pressure timing for 105 to 160 ATDC pulse width precisely.
Without this modification for YS fuel pressurized regulating system, this motor would lose the opportunity to be used for F3A P19 maneuver pattern purpose. The mechanism in ENYA G type carburetor with fuel squeezing makes it possible to invite YS system. Special designing, Aluminum-Chrome plated cylinder and Aluminum piston would make a good performance and it's longer life. So, any ordinary motor with fuel squeezing construction carburetor could be possible to operate under fuel pressurized condition.
The throttle barrel throat lower hole was enlarged to prevent orifice effect, this is an indispensable modification for motor stable operation at the lowest speed.
Any main needle valve setting with deception like under natural aspiration is not required, because pressurized fuel supply amount would be kept so stable in any attitude of airplane, rising up or coming down, from the beginning to the end of the maneuver.
Also, any fuel tank burdening position in the fuselage is acceptable even at tail end, most of the time very near CG position.
It is not notified the true potential and capability of the motor until it is actually used under fuel pressurized condition, once the fuel mixture is decided, the supplying fuel condition does not changed, no matter how rising up or downing phase or the beginning of the maneuver pattern or the last stage.
Posted at 2017/12/01 17:09:55 |
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A pressure nipple was set on ENYA 45 CXL with the same manner as ENYA SS 35. Fully disassembled as usual and the crank shaft on intake port was engraved to establish adequate pressure timing for 105 to 160 ATDC pulse width precisely. 
