Davenport Fixed Frame Geared Steam Locomotives

Davenport
Fixed Frame Geared Steam Locomotives

Geared Steam Locomotive Works Š

Ź Davenport Main

Fixed Frame Rod / Gear Hybrid
with gear case cutaway

Images

Components

Roster

The fixed frame models were similar to a small conventional tank type rod locomotive in outward appearance.

Similar to a rod locomotive:

the drivers were mounted in a fixed position on a fixed frame
the two steam cylinders were mounted horizontally and "in line" with the frame. One was mounted on either side of the forward part of the frame below the smoke box.
side and main rods were utilized

Unlike a rod locomotive, the locomotives utilized gearing to >"pull a third more tonnage than a direct drive locomotive of the same weight".^280d

Models:

Two basic models were built, 4 driver and 6 driver. A study of the roster and available images seems to reveal that most were tank type locomotives. The variations offered within each model are detailed in the tables below as transcribed from a company marketing brochure:

4 Driver Models Available - 5 to 25 Tons:

Code Word	Cylinder Inches	Driv- ing Wheels Dia. Inches	Wheel Base Ft-In.	Water Capa- city Gal.		Coal Cap. Lbs.	Rad. Sharp Curve Ft.	Wt. Lig't Rail	Weight Engine Working Order	Boiler Press Lbs.	Tractive Effort Lbs.	Haulage Capacity (tons)
Code Word	Cylinder Inches	Driv- ing Wheels Dia. Inches	Wheel Base Ft-In.	24" ga	36" ga	Coal Cap. Lbs.	Rad. Sharp Curve Ft.	Wt. Lig't Rail	Weight Engine Working Order	Boiler Press Lbs.	Tractive Effort Lbs.	˝%	1%	2%	3%	4%	5%	6%	7%	8%
Doorn	5˝ x 8	24	2-9	75	150	150	18	12	10500	160	3000	145	95	55	37	28	22	18	15	12
Doozen	6˝ x 8	24	3-0	95	175	250	20	16	15000	160	4250	203	132	76	52	39	30	24	20	17
Dorade	7 x10	24	3-9	130	240	400	25	20	19000	160	5120	246	160	92	62	47	36	29	24	20
Dorella	8˝ x 12	32	4-3	130	240	500	27	25	26000	170	7400	357	203	135	92	69	54	44	36	30
Dorsal	9˝ x14	32	4-9	140	260	600	32	30	36000	170	10500	507	332	192	132	98	77	62	52	43
Dortour	11x14	32	4-9	150	280	750	32	40	50000	170	14900	720	471	273	187	140	111	90	74	63

6 Driver Models Available - 7 to 30 Tons:

Code Word	Cylinder Inches	Driv- ing Wheels Dia. Inches	Wheel Base Ft-In.	Water Capa- city Gal.		Coal Cap. Lbs.	Rad. Sharp Curve Ft.	Wt. Lig't Rail	Weight Engine Working Order	Boiler Press Lbs.	Tractive Effort Lbs.	Haulage Capacity (tons)
Code Word	Cylinder Inches	Driv- ing Wheels Dia. Inches	Wheel Base Ft-In.	24" ga	36" ga	Coal Cap. Lbs.	Rad. Sharp Curve Ft.	Wt. Lig't Rail	Weight Engine Working Order	Boiler Press Lbs.	Tractive Effort Lbs.	˝%	1%	2%	3%	4%	5%	6%	7%	8%
Drilo	6˝x8	24	4-9	95	175	300	32	12	14500	160	4225	203	132	76	52	39	30	24	20	17
Drock	7 x 10	24	4-9	130	240	500	32	16	18000	160	5120	246	160	92	62	47	36	29	24	20
Dronte	8 x10	24	4-9	130	240	600	32	16	22000	160	6700	324	212	123	84	63	50	40	33	28
Druck	9 x12	32	6-6	140	260	750	60	20	30000	170	8300	400	261	151	103	77	60	48	40	33
Dryade	10 x14	32	7-0	140	260	1000	80	25	42000	170	11600	559	365	211	144	107	84	68	56	34
Dryope	11˝x14	32	7-0	150	280	1000	80	30	60000	170	16300	786	514	297	203	152	119	96	76	65

"The hauling capacities are based on a frictional resistance of 10 pounds per ton for the cars where the track is in good condition"

Page changed: February 17, 2019 08:08:12 PM