# TCDS TC 637: Hartmann Aircraft Corporation

- Type: Type certificate data sheet
- Status: Current
- Holder: Hartmann Aircraft Corporation
- Revision: 0
- Product: Aircraft, Small Airplane
- Registered aircraft: 3, by the registry models matched to it (OpenAirDocs)
- Data sheet PDF: https://openairdocs.org/files/sha256/8d/4d/8d4d6964f2fbdbb330786a416c03eed8cdc1235efe6035ac942632b5bda3826a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C5212F553B7D781585256738005B6AA4.0001
- Page: https://openairdocs.org/tcds/TC%20637

## Models (1)

As the data sheet lists them.

- OW5M

## What the data sheet says

This is OCR from the scanned FAA data sheet. OCR can misread letters and numbers.

```text
HARTMANN AIBCHAPT CORPORATION
MODELS:  Hartman OW5M (Pormerly Welch), 2 PCIH
I.C.  NUMBER: 637
Engine  Continental A-40-4 (See #OTE 1)
Fuel  73 minimum octane ariation gasoline
Engine limits  Por all operations, 2575 rpm (40 hp)
Airspeed limits  Level flight or climb - 75 mph True Ind.
Glide or dive - 90 mph True Ind.
Propeller limits  Maximum permissible diameter 77 in.
C.G. range  to (+19.5)
Datum  Leading edge of wing
Maximum weight
No. seats
Baggage  9 ibs. (behind seat)
Fuel capacity  9 gallons (two 4-1/2 gallon tanks in ving 1.E.)
oil capacity  gallon (engine sump)
Serial Nos. eligible  115 and up (See NOTE A)
Required equipment  Items 101.  102, 103
Certification basis  Type Certificate No. 637 (Aero. Bulletin 7A
requirements)
Production basis  Hone (See NOTE A)
Eligible for export to all countries except Great Britain, Canada,
Australia and New Zealand.
(Items included under "Required equipment" may not be remored unless
replaced by approred eguivalent items.  The effect upon balance of all
equipment changes must be computed and the aircraft operation record
Values in inches shown in parenthesis after each item
represent horizontal arms to the C.G. of the item measured minus (-)
ahead and plus (+) to the rear of the datum.  A plus (+) or minus (-) sign
preceding the weight of an optional item indicates the net weight change
between that item and the equivalent required item.)
Propellers and  Propeller
103-  Propeller  - wood (fixed or adJ. pitch)
Landing Gear and Floats
16x7-3 wheels (Goodyear 3NBA)  12 1bs.
102. 6x2.00 tail wheel
Hartman Model  "C" (formerly Welch)
cushion wheel  - 1 1b.
Miscellaneous (not listed above)
miscellaneous  items as noted in approved
weight and balance report.
301. Parachutes  20 1bs. each
Streamlined lift struts  -12 1bs. (approximately)
303.  Skis  Use actual weight change
(a) Heath 725
NOTE A.  Prior to original certification, each aircraft must satisfactorily
An inspection for workmanship, materials and conformity before any
covering, metal priming or final finish is applied.  All woodwork
may be varnished.
(b)  A final inspection of the completed aircraft.
(c)  Check of the flight characteristics.
No aircraft of this model shall be eligible for original certifi-
cation with single ignition engines after 8/1/41.  In addition, no
aircraft of these models shall be eligible for recertification with
single ignition engines unless such aircraft were either previously
certificated vith single ignition engines or were originally certifi-
cated prior to 8/1/41.
```

## ADs

None name its models.

## Registered aircraft by registry model (OpenAirDocs)

- [Hartmann WELCH OW5M](https://openairdocs.org/model/hartmann-welch-ow5m): 2 aircraft (registry code 4200102)
- [Welch OW5M](https://openairdocs.org/model/welch-ow5m): 1 aircraft (registry code 0764607)

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