NCR SA 14 Archer

NCR Model #3510

Additional Information

• Length: 47″
• Diameter: 2.64″
• Weight: 19.5 oz.
• # of Fins: 4
• Nose Cone: 4:1 Ogive
• Recovery: 36″ Parachute
• Parts List
  • Body Tube – White Cardboard Tube, 3.9″ x 34″ with 4 slots 1/8″ wide x 4″ long and 1/2″ from aft end
  • Payload Tube – White Cardboard Tube, 3.9″ x 7″
  • Tube Coupler – Brown Cardboard Tube, 3-7/8″ x 7″ x 1/16″
  • Nose Cone – White Plastic, 4″ OD x 20.5″ L, with shoulder 3.943″ x 4″
  • Centering Rings – 1/4″ x 3-7/8″
  • Motor Tube – Brown Cardboard Tube, 31.5″ x 29mm x 17″
  • Launch Lugs – Brown Cardboard Tubes, 5/16″ OD x 1/4″ ID x 1″ L (2)
  • Fin Set – Wooden (4)
  • Decal
  • Instruction Sheets
  • Strakes – Wood 1/16″ x 2″ x 34″ (2)
  • Wire Cable – Braided Steel, 1/16″ x 21″
• Recommended Engines
  • Estes – F15-4
  • Aerotech – F20-4W, F23-4FJ, F25-6W, F27-4R, F50-6T, F62-6T, F67-6W, G40-7W, G54-6W, G64-8W, G71-7R, G74-6W, G75-7M, G76-7G, G77-7R, G78-7G, G80-7T

Instructions

Photo Gallery

Build History

• 06/13/1999 – Purchased NCR SA-14 from Hobbylinc for $55.79 (Retail – $79.99)
• 12/05/2002 – Took pictures of package and components. Measured components and recorded them in Book #2 page 44.
• 12/06/2002 – Sanded centering rings to fit 29 mm engine tube. Epoxied rear centering ring in place.
• 12/22/2002 – Epoxied forward and middle centering ring into each position.
• 12/23/2002 – Spread epoxy at 16″, 4-1/2″, and 3/4″ from rear on the inside of body tube. Attached one end of cable to screw eye and other end to shock cord. Using an 11mm 6-sided socket screwed the screw eye into the centering ring hole. Secured screw eye with epoxy.
• 12/24/2002 – Cut 34″ slats in half. marked 1″ off bottom edge of each end. Cut a diagonal in each end to make 4 strakes. Rounded leading and tapered trailing edges of fins using a dremel tool. Taped fins with masking tape.
• 12/25/2002 – Cut tape holding strakes together and removed all tape except on root edge. Epoxied tube coupler into lower body tube. Epoxied upper body tube over tube coupler.
• 07/20/2003 – Sprayed fins and strakes with gray primer.
• 07/24/2003 – Sanded fins and strakes with 400 grit sandpaper.
• 08/18/2003 – Wiped with damp sponge allowed to dry and painted the fins with a second coat of Krylon #1318 gray primer
• 06/30/2007 – Removed tape from root edges
• 07/18/2007 – Using ASP 2 hour epoxy, epoxied 4 fins through body tube slots and onto the motor mount tube
• 08/05/2007 – Filleted fin joints with 5 minute epoxy.
• 05/16/2020 – Glued 4 strakes 8″ from aft end in line with fins.
• 05/17/2020 – Filleted strake joints. Drilled 1/8″ holes into aft and middle centering rings. Epoxied 1010 buttons into each hole.
• 05/18/2020 – Tied end of shock cord to nose cone. Except for paint and decals, this completes construction of North Cost Rocketry SA-14 Archer model rocket.
• 03/05/2022 – Spray painted entire model with red prime.
• 11/06/2023 – Spray painted entire model with Rust-oleum # 328373 High Gloss White.

Flights

Date	Location	#	Motor	Comments