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The Unofficial Bearhawk FAQ

Bearhawk Steel Requirements

 

Compiled by Rod Smith
Converted to HTML by Russ Erb

For Bearhawk with Optional Rear and Baggage Door and Float Reinforcement

Tubing Lengths By Drawing

Round 4130 "N" Tubing

Tube Size Length
feet
Remarks
  1/4 x .028 1  
T1 1/4 x .035 29  
T2 5/16 x.058 4  
  5/16 x .065 1  
T3 3/8 x .035 54  
  3/8 x .049 3  
T4 3/8 x .058 5  
  3/8 x .065 1  
  3/8x .090 1  
  7/16 x .049 2  
  7/16 x .065 1  
  7/16 x .095 1  
T5 1/2 x .035 58  
T6 1/2 x .049 8  
  1/2 x .058 1  
  9/16 x .120 2 Note: Substitute 9/16x.095 if you can find it.
T7 5/8 x .035 52  
T8 5/8 x .049 23  
T9 5/8 x .058 3  
  5/8 x .095 1  
T10 3/4 x .035 146  
T11 3/4 x .049 130  
  3/4 x .058 12  
T12 3/4 x .065 6  
  3/4 x .083 1  
  3/4 x .156 2  
T13 7/8 x .035 9  
T14 7/8 x .049 56  
T15 7/8 x .058 2  
T17 1 x .049 13  
T18 1 x .058 5  
T19 1 x .065 7 Updated for Drawing 18 update
  1 1/8 x .049 2  
  1 1/4 x .058 1  
T21 1 3/8 x .058 10  
T23 1 1/2 x .065 6  
T24 1 1/2 x .120 2  
  1 5/8 x .058 1  
  2 1/8 x .065 2  

Streamline 4130 "N" Tubing

Size Length
feet
1.012 x.428x .035 7
2.02 x .857 x .049 6

Square 4130 "N" Tubing

Size Length
feet
3/4 x 3/4 x .035 17
1 x 1 x .065 2

4130 Steel Rod

Size Length
feet
1/4 23
5/16 4

4130 "N" Steel Sheet

Thickness Size Remarks
0.032 2 sheets 18x72 Note: All T25 channel pieces can be made from one sheet if laid out carefully.
0.040 1 sheet 18x72  
0.050 18" x 16" 2 sq ft
0.063 18" x40" 5 sq ft
0.071 36" x 4" 1 sq ft
0.080 36" x12" 3 sq ft
0.090 36"x4" 1 sq ft
0.100 36"x12" 3 sq ft

4130 "N" Strips

Thickness Width Length
0.125 4" 1'
0.190 4" 2'

#304 Stainless Sheet

Thickness Size Remarks
26 gauge 36"x48" Firewall

Aluminum Tubing 6061T6

Size Length Remarks
3/4 x .035 7' Aileron Counterweight Tube

Aluminum Bar 2024T3

Size Length Remarks
1/8 x 1 1/4 12-12' lengths Main Spar Cap Strips
1 1/2 x 1 1/2 square 2' Bearhawk Strut Attach Fittings

 

 

Tubing Lengths By Drawing

Lengths are in inches unless otherwise specified
Feet are rounded up
SL = Streamlined
SQ = Square

 

Tubing Plans Drawing Number Bear-Tracks Issue Totals Tubing
T# Size 2 11 12 13 14 15A 16-16A 16B 17 18 19 20 21 22 23 25 26 27 28 Sum 95 Apr 96 Jan 98 Apr 98 Inches Feet Size
  1/4x.028                                 2             2 1 1/4x.028
T1 1/4x.035   7 3       99         146 66 4 5               10 340 29 1/4x.035
T2 5/16x.058                       3   36                   39 4 5/16x.058
  5/16x.065   2                   10                       12 1 5/16x.065
T3 3/8x.035   8         134     84   192 80 14     18   5       102 637 54 3/8x.035
  3/8x.049       20 4     2                               26 3 3/8x.049
T4 3/8x.058     13         5 2   5   7       5 4 2       6 49 5 3/8x.058
  3/8x.065   2                                           2 1 3/8x.065
  3/8x.095       4                                       4 1 3/8x.095
  7/16x.049   16                                           16 2 7/16x.049
  7/16x.065           1                                   1 1 7/16x.065
  7/16x.095   6   6                                       12 1 7/16x.095
T5 1/2x.035   14         71   116 214   275           6           696 58 1/2x.035
T6 1/2x.049     13 26         2     34         3 7           85 8 1/2x.049
  1/2x.058                                     2         2 1 1/2x.058
  9/16x.120           1                 8 3           10   22 2 9/16x.120
T7 5/8x.035             194   200 209                 10         613 52 5/8x.035
T8 5/8x.049             184     60     20             3     5 272 23 5/8x.049
T9 5/8x.058             16         10         6   1         33 3 5/8x.058
  5/8x.095                     3                         3 1 5/8x.095
T10 3/4x.035             786   281 216               22         440 1745 146 3/4x.035
T11 3/4x.049 164 70 64   12   792   348 41               54 12         1557 130 3/4x.049
  3/4x.058                                 3         138   141 12 3/4x.058
T12 3/4x.065     28       16       23                         67 6 3/4x.065
  3/4x.083   2                                           2 1 3/4x.083
  3/4x.156                               18               18 2 3/4x.156
T13 7/8x.035                       100                       100 9 7/8x.035
T14 7/8x.049             146   71 98   212 55       56 25           633 53 7/8x.049
T15 7/8x.058     10   5                         2           17 2 7/8x.058
T17 1x.049                 70 77                           147 13 1x.049
T18 1x.058                 32       18         2           52 5 1x.058
T19 1x.065                 34 38                           72 7 1x.065
  1 1/8x.049                                 15             15 2 1 1/8x.049
  1 1/4x.058                                 3             3 1 1 1/4x.058
T21 1 3/8x.058                 43           70                 113 10 1 3/8x.058
T23 1 1/2x.065                             64                 64 6 1 1/2x.065
T24 1 1/2x.120                             20                 20 2 1 1/2x.120
  1 5/8x.058                             1                 1 1 1 5/8x.058
  2 1/8x.065                               18               18 2 2 1/8x.065
  1x.428x.035 SL                     76                         76 7 1x.428x.035 SL
  2x.857x.049 SL                               64               64 6 2x.857x.049 SL
  3/4x3/4x.035 SQ             201                                 201 17 3/4x3/4x.035 SQ
  1x1x.065 SQ                                       15       15 2 1x1x.065 SQ
  1/4" Rod               34         176                   28 238 20 1/4" Rod
  5/16" Rod                                         40     40 4 5/16" Rod


 
 Revised 6 May 2003

 

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