Aluminum Ribs


Piper STC’d Ribs

R-3 series airfoil is a USA-35B modified as per original Piper design.

NOTE: We have an STC for this rib for use in restorations!

T-Cap section is extruded 6061-T6. Intercostals are 2024-T3
Rib is riveted to cap of metal I-beam spar.
Rib is screwed to web of a wooden spar.

Rivets attaching intercostals to rib base can be pre-drilled but un-attached for easy replacement purposes at no extra charge. (Request with order.)

Rivets are 5056 series, closed end aluminum with steel mandrel and domed head.

A single rib will be sent upon request for the price of the rib plus $25.00 shipping and handling.

8-A – USA 35B MOD – 63 CHORD – STC’D

L or T Section

(A) = 63″ (B) = 9″ (C) = 31″

BUTT – L section, brace$82.00
FULL$78.00
TANK BAY$84.00
AILERON$78.00
FLAP$78.00
INBOARD – (R or L)$82.00
OUTBOARD – FULL$82.00
OUTBOARD – 60″$82.00
WING TIP – (R or L)$74.00
WING TIP NOSE$36.00
NOSE$36.00

Note: All published prices subject to change

NOTE: USA Dollars only. Please call for current USA and foreign trade pricing.

For wood spar wings add ” – W” to the end of part number.
For metal spar wings add “- M” to the end of the part number.
Designate RIGHT or LEFT where indicated.


Experimental Aircraft Aluminum Ribs

  • All series can be made from “L” or “T” extruded section
    • “T” Section:Fabric can be rib stitched only.
    • “L” Section: Fabric can be riveted.
  • USA 35B modified and STC’d for Piper J3 – PA18 replacement ribs
  • USA 35B  available experimental.
  • Ribs are made for flange attach on aluminum spars and web attach on wood spars.
  • The dimensions given are standard. Any custom dimension is $25.00 per dimension change.
  • All ribs are made from 6061-T6 heat treated extruded aluminum cap strip and 2024-T3 intercostals.
  • Metal or wood spar must be specified on order.
  • Custom Ribs – quoted upon inspection of airfoil.

10 – A – Gottingen 387 (Modified) – (Experimental)

L or T Section

(A) = 48″ (B) = 9 1/4″ (C) = 24″

BUTT$72.00
FULL$67.00
AILERON $67.00
INBOARD$72.00
OUTBOARD$72.00
NOSE$36.00

Designate R or L with number for right or left hand.

Note: All published prices subject to change

NOTE: USA Dollars only. Please call for current USA and foreign trade pricing.


Gottingen 397 (Modified) – (Experimental)

L or T Section

(A) = 54″ (B) = 9″ (C) = 26 1/2″

BUTT$72.00
FULL$67.00
AILERON$67.00
INBOARD$72.00
OUTBOARD$72.00
NOSE$36.00

Designate R or L with number for right or left hand.

Note: All published prices subject to change

NOTE: USA Dollars only. Please call for current USA and foreign trade pricing.


7-A – USA 35B – 63 CHORD – (Experimental)

L or T Section

(A) = 63″ (B) = 9″ (C) = 31″

BUTT – L section brace$80.00
FULL$76.00
TANK BAY$82.00
AILERON$76.00
FLAP$76.00
INBOARD $80.00
OUTBOARD – FULL$80.00
OUTBOARD – 60″$80.00
WING TIP$77.00
WING TIP NOSE$36.00
NOSE$36.00

Designate R or L with number for right or left hand.

Note: All published prices subject to change

NOTE: USA Dollars only. Please call for current USA and foreign trade pricing.