TCDS ATC 621

MODEIS: Stinson SR-9A, -9B (Army UC-81N), -9C (Army UC-81C) I-C. NUMBER: ATC 621 I - SPECIFICATIONS PERTINENT TO ALL MODELS Placard speeds Level flight or climb - 164 mph True Ind. Glide or dive - 220 mph True Ind. Flaps extended - 122 mph True Ind. Oil capacity 5 gallons No. passengers (front +15, rear +53.5) Baggage 150 1bs. (50 Ibs. under rear seat (+54): 100 1bs. in compartment aft of cabin (+75.5)) (See NOTE 2) C.G. limits Landplane (+17.7) and (+27.6) Seaplane (+18.1) and (+27.3) Specification basis Approved Type Certificate No. 621 Serial numbers 5100 and up manufactured prior to 10/25/40 and all AAF numbers of UC-81C and UC-81N eligible. Approval expired as of 10/25/40. EQUIPMENT: (Datum is the leading edge of wing (outboard curved portion) (* Means net increase) class I: Landplane: 101. Engine ring cowl 36 1bs. 102. (Now Class III equipment) 24 lbs. 103. Starter (Eclipse E-80) 20 1bs. 104- Heater and ventilator (2 1bs.) 14 Ibs. 105. Leather upholstery 106. 7.50-10 wheels (Goodyear 10HBM) with 8.50-10 4-ply tires (wheels must be placarded for this size tire) 107. 10.5 in. streamline tail wheel and tire 108. Batteries (Exide 6TS-13-1) (aft of cabin back wall) 38 1bs. 109. (Now Class III equipment) 110. Oil cooler Seaplane: (Items 101 thru 110 less 102, 106 and 107 PLUS) 151. Edo 39-4000 floats with water rudders 152. Auxiliary seaplane fin Class II: 200. Miscellaneous items as noted in approved weight and balance report. 201- Generator (-40) (a) 15 amp. type 25 1bs. (b) 25 amp. type 30 lbs. 202. Battery (a) Exide 6TS-19-1 (replaces item 108) 80 Ibs. (b) Additional Exide 6TS-13-1 (structure must be altered per Drawing P2917) 38 1bs. 203. (SR-9B and SR-9C) one or two 24 gallon auxiliary fuel tanks in wing leading edge 22.5 1bs. each (+16) 204. Multipurpose type (designated by pertinent model suffixed ty letter "") this type may have auxiliary door ait o main door on right side, large door frame for main and auxiliary doors, removable back on copilot's chair, stretcher door in back wall, ski type fuselage, ambulance litter and instal- lation, and metal lined cabin. Allow- able standard weight is 3750 lbs. as landplane, 4000 1bs. as seaplane. Class III: 102. Wheel streamlines 24 1bs. 109- Fire extinguisher (Pyrene) 11 1bs. (+2) 301. Special instruments (-9) (a) B engine installed 40 1bs. maximum (b) D engine installed 32 lbs. maximum 302. Flares (three 1-1/2 minute) and wiring (2 1bs.) (+100] 303. Fire extinguisher (lux Press.) (+2) 304. (a) Releasable cabin door Neglect weight (b) Top hinged cabin door Neglect weight 305. Puncture proot tubes (+4) 306. Landing lights (+14) 307. Special polish on wings (+36) 308. Parachute pilot (front) chair 1 or 2 at 15 lts. (+18) 309. Engine shielding (-46) 310. (a) 70 gallon fuel capacity (2 tanks in wing at 35 gallons each (+34) 82 gallon fuel capacity (2 tanks in 5 1bs. * (+34) gallon fuel capacity (2 tanks in wings at 39 gallons each) 5 1bs. * (+34) 311. fuselage F-3475 (denoted by letter 'S added to serial number) 8 1bs.* (+93) 312. Ski type landing gear 14 1bs.*(+9) and ski fittings 9 1bs. (+2) 313. Fog light 3 1ks. (+2) 314- Double intensifier heater 5 lbs.* (-43) 315. Fuel analyzer 7 1bs. (-14) 316. Radio equipment: Maximum of 61 1bs. aft of cabin rear in addition to 30 lts. at or their equivalents. 317. 5 lts. 318- Lycoming - P-220 with Curtiss (SR-9B only) 10 lbs.* (-64) Lycoming P-220 with Curtiss 320SO blades (SR-9B and SR-9C only) 13 1bs.* (-64) (c) Lycoming P-220 with Lycoming SO200806 blades (SR-9B and SR-9C 7 1bs.* Lycoming P-220 with Lycoming SO220806 blades (SR-9B and SR-9C 7 1bs. * Lycoming P221 with Curtiss B350S1 (SR-9B only) Goodyear 4HEM wheels with 25x11-4 4-ply (To be used when landing gear built as per Stinson Drawing I-608. When these wheels are used, blades must be installed to maintain the required propeller clearance.) 10 1bs.* 320. 6-1/2 or 8 gallon oil tank 321. Vacuum pump 8 lbs. (-25) 322. Constant speed control (SR-9B and SR-9C only) • 1bs (-59) 323. Camera hole in cabin floor 1 1bs 324. Deleted 6/29/38. 325. Reinforcement for lower lift strut 326. Wing lift 2itting either of Stinson Drawing numbers 2-2276, " 1bs.* yokes (one on each side of fuselage) 2-2328, Z-2336 Or F-3440 alteration in per accordance with Stinson Drawing Z-3515 327- Skis (use actual weights) Alaska Airmotive 3750-L Grat & Smith or Wien GS-1 Eligible for export as follows subject to inspection for equipmer.t specified in Chapter XII of Inspection Handbook (10/25/40): Canada - Landplane - Seaplane - Maximum standard weight 4000 1bs. - Skiplane - not eligible. However, structure complies with Canadian requirements for ski installation when items 311 and 312 are installed. (k) All other countries except Australia. NOTE 1b. when three passengers occupy the rear seat and it mies rict placarded (unless actual weight and ralance shows a lesser restriction Baggage in compartment aft of cabin must be limited to a maximum of necessary.) NOTE 3. Series B engines approximately 11 1bs. lighter than series D. II - MODEL SR-9A, DESIGNATION 5 PCLM Engine Lycoming R- 680-B4 Placard limits Махіти, except take-off -- in. Hg., 2100 rpm (225 hp) Take-off (one minute) -- in. Ag.. 2100 rpm (225 hp) Propeller Hamilton Standard adjustable metal, hub 540%, blades 5B1-6 or 5B1-7. Diameter 8'6" maximum, 50 gallons (2 tanks, 25 gallons in each wing) (+34) minimum -- 79 1bs. Fuel capacity Standard weight 3700 1bs. III - MODEL SR-9B (US-81N), DESIGNATION 5 PCL-SM (Same as SR-9A except engine installation) Engine Lycoming R-680-B6 or R-680-D6 (See NOTE 3) Placard limits (-B6) : Maximum, except take-off -- in. Hg.. 2100 rpm (225 hp) Take-off (one minute) -- in. Hg.. 2300 rpm (245 hp) except take-ofi Propeller Take-on. Hg., 2300 gpm (245 hp) 2B20, blades 6135A-6 to Diameter 8'6-1/8" maximum, 7'9-7/8" minimun Fuel capacity Weights heavier than landplane) 3700 1bs. (See Item 204) (Seaplane) 4000 1bs. IV - MODEL SR-9C (UC-81C), DESIGNATION 5 PCI-SM (Same as SR-9B except engine installation) Engine LYcoming R-680-B5 or R-680-D5 (See NOTE 3) Placard limits (-B5): Maximum, except take-off -- in. Hg.. 2000 Ipm (240 hp) rake-oft (one minute -- in. Hg., 2300 rpm (260 hp) Maximum, except take-off -- in. Hg., 2100 rpm (245 hp) Take-off (one minute) -- in. Hg.. 2300 rpm (260 hp) Propeller Hamilton Standard hub 2B20, blades 6135A-6 or Diameter 8'6-1/8" maximum, 8'3-7/8" minimum 104 1bs. (-66) Fuel capacity 70 gallons (2 tanks, 35 gallons in each wing) (seaplane approximately 322+3u) weights Empty - Use actual heavier than landplane) Standard - (Landplane) 3750 1bs.: (Seaplane) 4000 lbs.