On Mark Marksman
Specifications
Crew: 1(2)
Capacity: 6 to 8 passengers (including 'jump' seat)
Takeoff gross weight: ........................................................
35,000 lbs.
Landing
weight: ................................................................ 31,000 lbs.
Empty weight: 25,200
lb - 27,150 lb for the Special Purpose vers'n
Useful load:
.................................................................10 - 11,000 lbs.
Wing span: ( with tip tanks ) ...............................................71
ft. 6 in.
Wing area:
......................................................................540 ft² (50 m²)
Length: ...............................................................................53
ft. 10 in.
Height ...................................................................................18
ft. 6 in.
Engines : ( by specification
)
“Marksman A“
- Two P&W R2800-75/79 engines ( less than 350 hours SMOH ) with 23E50-505 propellers
“Marksman B“ - Two
P&W R2800 83AM-4A ( zero time SMOH ) with Hamilton Standard 33E60 propellers ( 43E60 reversible propellers optional )
“Marksman C“ - Two
P&W R2800 CB16/17 ( zero time SMOH ) with Hamilton Standard 43E60 reversible propellers
Fuel capacity : ( by
specification )
“Marksman A“ - (
standard ) ..................................................................800 gal.
“Marksman B“ - (
standard plus 165-gal. wing-tip tanks )....................1,130 gal.
“Marksman C“ - ( stand, wing-tip
tanks and Pliocell int wing tanks.....1,330 gal.
Performance
*
Takeoff distance over 50 ft:
( 32,600 lbs. ) ............................3,495 ft.
Takeoff ground run:
( 32,600 lbs. ) .......................................2,450 ft.
Landing over 50 ft:.
( without reversing props ).....................3,000 ft.
Two-engine ceiling:
............................................................. 25,000 ft.
Single-engine ceiling: .........................................................
16,400 ft.
Single-engine speed:
( at 16,400 ft. ) ...................................200 mph
Max. rate of climb (
32,000 lbs. )
Sea level ...............................................................................1,700
fpm
10,000 ft: ..............................................................................1,300
fpm
20,000 ft: .................................................................................500
fpm
Max. range, tip tanks &
Pliocell wing tanks (norm reserve).....2,500 mi.
Norm range, tip tanks &
Pliocell wing tanks (norm reserve)....2,100 mi.
Stall speed :
Power
off, gear-flaps down, 29,000 lbs., tip tanks .........85 mph
Same
as above without tip tanks ....................................95 mph
Note: Marksman B:
Two 165 US gal (622 l) wingtip tanks)
Airfoils
Wing Root Airfoil: NACA 65-215
Wing Tip Airfoil: NACA 65-215
Max. gear extension speed:
..............................................160 mph IAS
Max. flap extension speed:
...............................................208 mph IAS
Vne speed ( max. – never
exceed ) at 35,000 lbs. ...................365 mph
Cruise speed : ( by specification
)
“Marksman A“
- ( At 16,000 ft. ) ......................................................................................325
mph
“Marksman B“
- ( At 18,000 ft. ) ......................................................................................350
mph
“Marksman C“
- ( At 23,000 ft. ) ......................................................................................365
mph
Maximum
speed: 365 mph (317 knots, 587 km/h)
Power/mass: 0.143 hp/lb (106.5 W/kg)
Fuel consumption : ( by specification
)
“Marksman A“
- ( Per engine ) ............................................................................80 gal./hr.
“Marksman B“
& “C“ - ( Per engine ) ..............................................................95
gal./hr.
*
( Where not indicated, performance is based on R2800-75/79 engines. All speeds are in statute miles )
Prices for these aircraft
On Mark Marksman A - $257,430.00
On Mark Marksman B - $314,715.00
On Mark Marksman C - $361,492.00
Note: These prices did not include for radio/Avionics, electronics
or sales tax.
Note: On Mark Marketeer modifications
See equipment
schedule for Marketeer N61B ( Bottom
of page )
On Mark Engineering ( Marketeer
) Modification Details and Prices – May, 1962
The following is transcribed from a May 1962 price list from On Mark Engineering for civilian conversion of B-26 Invaders.
NOTE:
Many of the prices listed below are based on performing the modification at the time of complete aircraft conversion and consequently
would be slightly higher if performed separately. Price adjustment would depend on the configuration of the customer’s
aircraft.
1. Fuselage and spar conversion.
Install circumferential rear wing spar. Install Airstair door RH side. Install 8 windows ( 2 picture windows ). Recontour
fuselage top &bottom. Modify wiring, plumbing, cables, floor, etc. $58,000
2. Fuselage conversion. Install
belly ladder door. Install 8 windows ( 2 picture windows ). Recontour fuselage top only. Modify wiring, plumbing, cables,
floor, etc. $38,000
3. Custom Interior. $17,000.
4. Deluxe Interior. $25,000.
5. Install Wing Tip Tanks ( 165
gal. each ). Modify wing plumbing and valves. Install boost pumps and dump valves. $16,710.
6. Install Pliocell Wing Tanks (
100 gallons each ). Modify wing, plumbing and valves. $10,500.
7. Replace existing self-sealing
main and aux. fuel tanks with lightweight Pliocell tanks. ( reduces airplane weight 450 lbs. ) $5,200. With top filler necks
( adds 90 gal. usable fuel ). Includes A.D. Note compliance. $6,000.
8. Install 103” Plastic Nose.
Includes ladder, baggage door. Provides for 1,000 lbs. baggage and radar. $10,500.
9. Install dual controls. $5,500.
10. Install Co-Pilot Brake Pedals.
$990.
11. Install 100,000 B.T.U. Heater
and Ducting. $3,900.
12. Install Custom Instrument Panel.
Includes complete set flight instruments for co-pilot. Includes custom glare shield for radio controls. $4,250.
13. Install Scott High Pressure
Oxygen System. $1,800.
14. Install DC-6 Wheels and Brakes. $4,850. In kit form. $4,450.
15. Install Hytrol Anti-skid braking system. $5,250.
16. Chrome Plate landing Gear struts. $1,200.
17. Install Tip Tank Landing Lights. $1,050.
18. Install De-icer Boots all Surfaces. ( Goodrich high-pressure “stick-on” type ) $8,850.
19. Install Long all-metal rudder. Includes modified tail cone and vortex generators. $9,750.
20. Install Nose Wheel Steering. Choice of rudder pedal or aux. wheel control. $1,995. In kit form $1,550.
21. “Ceconite” covered Control Surfaces-exchange. $1,800. With new draft curtains $2,150. Installed complete
$2,450.
22. Modify Canopy. Metalized top and install double glass $1,750.
23. Modify Cockpit Plumbing and Structure. Provide space for observer seat $3,100.
24. Install Refrigerated Air Conditioning. Operates in flight or on the ground $5,000.
25. Install Auxiliary Power Unit: New 105 ampere Homelite APU $2,450. Surplus 70 ampere APU $1,700.
26. Custom Exterior Paint – paint only. $3,850. Strip and clean $960. Seal Exterior $1,100.
27. Install 20-gallon Engine Alcohol Tank. $870.
28. Install Fire Warning and Fire Extinguishing System with Firewall Shut-off Valves. $2,650.
29. Install Modified Short Metal Nose. Includes ladder baggage door. $2,500.
30. Install New Bendix Weather Radar. Includes Sperry Gyro Antenna Stabilization ( 103” Plastic nose required
) $18,500.
31. Install Overhauled, Certified Sperry A-12 Autopilot unit $18,500.
32. Install P&W R-2800 “C” Series engines with Hamilton Standard 33E60 High-activity propellers and
autofeather. Labor and installation material only. Engines and propellers priced separately. $15,450.
33. Install P&W R-2800 “CB” Series engines with Hamilton Standard 33E60 High-activity propellers and
autofeather. Labour and installation material only. Engines and propellers priced separately. Includes ADI installation. $16,800.
34. Install propeller spinners and afterbodies. Includes cowling mod. For inside carb. air scoops. On request.
35. Install Hamilton Standard 43E60 reversing propellers on “C”
or “CB” engines. Labor and installation material only. Propellers priced separately. $4,800.
36. Install Booster Tab Rudder and Vortex Generators ( with exchange rudder ). Lowers Vmc to 118 mph C.A.S. ( standard
engines ). Includes new Ceconite cover and matching paint $3,950. In kit form $3,750.
37. Flap modification for increased flap extension speed. 25 degrees flaps may be extended at 250 mph I.A.S. $265.
In kit form $145.
