Engine Performance Data

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BONANZA BARON TRAVEL AIR

Engine TCDS

TCM Compression Ratio's

Continental E185 

E246 Rev20

E-series = (205hp@2600) 7:1

Continental E225

E267 Rev10

E-series =  (225hp@2650) 7:1

Continental O-470-G

 IO-470-C

E-273 Rev 36

O-470-G (240hp@2600) 8:1

IO-470-C (250hp@2600) 8:1

Continental IO-470-N

IO-470-K

3E1 Rev 26

IO-470-N (260hp@2625) 8.6:1

IO-470-K (225hp@2600)  7:1

Continental IO-520 E5CE Rev 25

IO-520-BB (285hp@ 2700) 8.5:1

Continental IO-550

E3SO Rev 6

IO-550-B (300hp@ 2700) 8.5:1

 

Engine TCDS

TCM Compression Ratio's

Continental 

 IO-470-L

3E1

O-470-L (260hp@2625) 8.6:1

Continental IO-520-C

IO-520-CB

E5CE

IO-520-C (285hp@2700) 8:5

IO-520-CB (285hp@2700)  8.5:1

Continental IO-550-C

E3SO Rev 6

IO-550-C (300hp@ 2700) 8.5:1

Lycoming TIO-541-E1B4

E10EA 380hp @2900

7.3:1

 

Engine TCDS

TCM Compression Ratio's

Lycoming O-360-A1A

0-360-B1A

0-360-B1B

E286 180hp@2700 8.5:1

7.2:1

 

 

What's the E-Series difference?

 

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

 

 

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

 

E185-8 similar to E185-11

E-185-11 is identical to E185-8 except for revised mounting brackets.

 

Basic differences between the E185 and E225

Detailed information

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).

 

E225-8 

Removal of RPM restrictions. Model E35 Bonanzas equipped with Continental E-225-8 Engines, serials prior to Bonanza D-3785.

SB E35-4

 

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).

  E185_performance_curve_chart.jpg (128833 bytes)


Cruising Horsepower Engine Settings

 

E185-1

E185-8 (same as -11)

E185-11

 E225-8

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.

 


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