Engine Performance Data
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What's the E-Series difference?
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E-165-4 evolves into E-185-1 Bonanza Serial #'s D-1 through D-491 most likely started service with the E-165-4 or E-165-4A engine. Beechcraft issued a Service Bulletin that addressed the re-designation of this engine to a E-185-1. Copy of SB 35-3
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E185-1 evolves into E-185-8 Bonanzas prior to serial D-1950 through Beech Letter 0-49-43 can modify the engine to use the Eclipse E-80 starter |
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E185-8 similar to E185-11 E-185-11 is identical to E185-8 except for revised mounting brackets. |
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Basic differences between the E185 and E225 1.) Crankshaft (5th & 6th order dampers) actually this depends on the S/N's of the E-185. 2.) Cylinders (natural choke). 3.) Pistons slipper type skirt. 4.) Camshaft (greater valve overlap). 5.) Carburetor (higher flow rate). |
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E225-8 Removal of RPM restrictions. Model E35 Bonanzas equipped with Continental E-225-8 Engines, serials prior to Bonanza D-3785. |
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Recommended use of Model 215 Propeller with 84-inch diameter blades Beech Service Letter SL 35-49 E-165 and E185 engines prior to TCM 22183 are not equipped with the correct crankshaft dampers for use with the 84-inch propeller. When used on these engines, the shorter blades produce excessive vibratory stresses at various rpm and power settings throughout the normal operating range. Only E-225-8 engines, serial 30087 and above, and E-185-11 engines, serial 22183 and above, fitted with one fifth order and one sixth order crankshaft damper, are satisfactory for use with the 84-inch propeller. |
E 185 Engine Performance Curves (sea level).
Cruising Horsepower Engine Settings
E185-8 (same as -11) |
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The above charts are from an original POH's and perhaps no longer valid. It is intended as reference only. You need to use the current data provided by Raytheon in the most recent POH. |
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Approved Engines installations from Beech.
Model 35
E185-1 engine
E185-8 engine
E185-11 engine
E225-8 engine (Flight Manual Supplement letter from FAA)
Take off (1 minute) 2300 rpm (185hp) 26.5mp
All other operations 2050 rpm (165hp) 27.5mp
Tachometer markings with these propeller combinations
RPM's RPM's
Beech R200-series (wood blades) 1300-2050 2050-2300 2300
Beech B200-series (wood blades) 1300-2050 2050-2300 2300
Beech 215-series (aluminum) 1300-2050 2050-2300 2300
Hartzell HC12X20 1300-2050 2050-2300 2300
The conservative instrument markings above are what has to be printed on the instrument faces and Operators manual.. However, the E225-8 and the E185-11 both perform well outside these conservative limits. Continental rates the E185-11 and E225-8 at respectable max cruising limit of 2300 rpm. And take-off at 2650 for the E225-8 and with the Beech Electric Prop combination. For a Hartzell on the E225-8 or either prop combination on the E185-11, it was 2600 rpm. Again, all the performance charts for the 1947, 1948 Model 35 Bonanza's are related to the performance limitation set forth according to the TCDS or the Pilot Operating Handbook. Also any additional supplements. It's advisable to carry copies of both information regarding performance. If you have the E225-8 engine installed in a 35 Model, then carry a copy of the E225-8 performance information too. It might just come in handy.
Model A35
E185-1 engine
E185-8 engine
E185-11 engine
Take off (1 minute) 2300 rpm (185hp)
All other operations 2050 rpm (165hp)
Tachometer markings with these propeller combinations
RPM's RPM's
Beech R200-series (wood blades) 1300-2050 2050-2300 2300
Beech B200-series (wood blades) 1300-2050 2050-2300 2300
Beech 215-series (aluminum) 1300-2050 2050-2300 2300
Hartzell HC12X20 1300-2050 2050-2300 2300
E225-8 engine
Take off (1 minute) 2650 rpm (225hp)
All other operations 2300 rpm (185hp)
Tachometer markings with these propeller combinations
RPM's RPM's
Beech 215-series (aluminum blades) 1750-2300 2300-2650 2650
Hartzell HC12X20 1900-2300 2300-2600 2600
Model B35
E185-8 engine
E185-11 engine
Take off (1 minute) 2450 rpm (196hp)
All other operations 2050 rpm (165hp)
Tachometer markings with these propeller combinations
RPM's RPM's
Beech B200-series (wood blades) 1300-2050 2050-2450 2450
Beech 215-series (aluminum) 1750-2050 2050-2450 2450
Hartzell HC12X20 1900-2050 2050-2450 2450
E225-8 engine
Take off (1 minute) 2650 rpm (225hp)
All other operations 2300 rpm (185hp)
Tachometer markings with these propeller combinations
RPM's RPM's
Beech 215-series (aluminum blades) 1750-2300 2300-2650 2650
Hartzell HC12X20 1900-2300 2300-2600 2600
Model C35
The Beech C35 Owners Manual has the following information
for E185-11 Cruising Horsepower Settings.
Do Not Exceed 2150 RPM for Cruise.
Do not exceed 25" mp & 2150 for cruise climb
The TCDS lists the following
2600 rpm Take-off
2300 rpm for all other operations
E185-11 engine
Take off (1 minute) 2600 rpm (205hp)
All other operations 2300 rpm (185hp)
Tachometer markings with these propeller combinations
RPM's RPM's
Beech 215-series (aluminum blades) 1750-2300 2300-2650 2600
Hartzell HC12X20 1900-2300 2300-2600 2600
E225-8 engine
Take off (1 minute) 2650 rpm (225hp)
All other operations 2300 rpm (185hp)
Tachometer markings with these propeller combinations
RPM's RPM's
Beech 215-series (aluminum blades) 1750-2300 2300-2650 2650
Hartzell HC12X20 1900-2300 2300-2600 2600
Model D35
E185-11 engine
Take off (1 minute) 2600 rpm (205hp)
All other operations 2300 rpm (185hp)
2150 for cruise. Do not exceed 25" mp & 2150 for cruise climb.
Tachometer markings with these propeller combinations
RPM's RPM's
Beech 215-series (aluminum blades) 1750-2300 2300-2600 2600
Hartzell HC12X20 1900-2300 2300-2600 2600
E225-8 engine
Take off (1 minute) 2650 rpm (225hp)
All other operations 2300 rpm (185hp)
Tachometer markings with these propeller combinations
RPM's RPM's
Beech 215-series (aluminum blades) 1750-2300 2300-2600 2650
Hartzell HC12X20 1900-2300 2300-2600 2600
Model E35
E185-11 engine
Take off (1 minute) 2600 rpm (205hp)
All other operations 2300 rpm (185hp)
Tachometer markings with these propeller combinations
RPM's RPM's
Beech 215-series (aluminum blades) 1750-2300 2300-2600 2600
Hartzell HC12X20 1900-2300 2300-2600 2600
E225-8 engine
Take off (1 minute) 2650 rpm (225hp)
All other operations 2300 rpm (185hp)
Tachometer markings with these propeller combinations
RPM's RPM's
Beech 215-series (aluminum blades) 1750-2300 2300-2650 2650
Hartzell HC12X20 1900-2300 2300-2600 2600
Model F35
E185-11 engine
Take off (1 minute) 2600 rpm (205hp)
All other operations 2300 rpm (185hp)
Tachometer markings with these propeller combinations
RPM's RPM's
Beech 215-series (aluminum blades) 1750-2300 2300-2600 2600
Hartzell HC12X20 1900-2300 2300-2600 2600
E225-8 engine
Take off (1 minute) 2650 rpm (225hp)
All other operations 2300 rpm (185hp)
Tachometer markings with these propeller combinations
RPM's RPM's
Beech 215-series (aluminum blades) 1750-2300 2300-2650 2650
Hartzell HC12X20 1900-2300 2300-2600 2600
Model G35
E225-8 engine
Take off (1 minute) 2650 rpm (225hp)
All other operations 2300 rpm (185hp)
Tachometer markings with these propeller combinations
RPM's RPM's
Beech 215-series (aluminum blades) 1750-2300 2300-2650 2650
Hartzell HC12X20 1900-2300 2300-2600 2600