The Descriptive Finding Guide for the Hoffman-Russell Parachute Company Corporate Records SDASM.SC.10074
Alan Renga
San Diego Air and Space Museum Library and Archives
10/22/2014
Language of Material:
English
Contributing Institution:
San Diego Air and Space Museum Library and Archives
Title: Hoffman-Russell Parachute Co. Corporate Records
Identifier/Call Number: SDASM.SC.10074
Physical Description:
0.36 Cubic Feet
One Box
Date (inclusive): 1926-1942
Abstract: The Hoffman-Russell Parachute Company was founded by James M. Russell and Major Edward L. Hoffman, both of whom helped design
first parachute at McCook Flying Field in Dayton, Ohio, which was adopted by the Army Air Corps.
The collection is open to researchers by appointment.
Some copyright may be reserved. Consult with the library director for more information.
[Item], [Filing Unit], [Series Title], [Subgroups], [Record Group Title and Number], [Repository “San Diego Air & Space Museum
Library & Archives”]
Immediate Source of Acquisition
The materials in this Collection were donated to the San Diego Air and Space Museum.
James M. Russell had little to no aviation experience before becoming a major contributor to the evolution of parachutes.
He helped design the first parachute at McCook Flying Field in Dayton, Ohio with Major Edward L. Hoffman, and this parachute
was adopted by the Army Air Corps. Following this, Russell came to San Diego and designed the “Lobe” parachute, which reduced
the force the handler experienced when the parachute was deployed by 1/3rd of other parachutes, as well as eliminating oscillation
that plagued previous parachutes on their descent. Russell also patented the parachute pack. These two innovations led to
the development of the Russell Parachute Company, located in San Diego. The company aimed to sell its parachutes to the military,
but it also advertised towards commercial aviation. The company insisted that all aircraft passengers should be provided with
a parachute in the case of an emergency.
Russell and Hoffman also experimented with other parachute designs, including a parachute for an entire aircraft. Should a
malfunction occur, a parachute could be deployed to slow down the aircraft’s speed and hopefully give the pilot enough control
to land the plane. Although his ideas were never implemented, his insight has been modified and used by other companies today.
Russell died of a heart attack in Las Vegas, Nevada on September 13, 1941 at the age of 43.
The majority of this collection contains business correspondence, diagrams, and blueprints. There are a few photographs, and
a postcard, as well as newspaper articles. A few sheets of paper were stapled and contain rust marks. The book Parachute was
also stapled. Report No. 706 was held together by special binding screws. The unmarked folders have pink string taped to the
folder itself.
Note: Northrop in Folder 2, unmarked folder 3, there is an original typographical error that spells it “Northrup.”
Secondary Sources:
Dixon, Charles. Parachutes for Airmen. London, Great Britain: 1930.
Glassman, Don. Jump. New York: 1930.
Zim, Herbert S. Parachutes. New York: 1942.
Subjects and Indexing Terms
World War, 1939-1945 -- Campaigns -- Pacific Area
Airplane factories
Aeronautics, Commercial
Parachuting
Lobe Parachute
Hoffman-Russell Parachute Company
Hoffman, Major Edward L.
Russell, James M.
Box 01
Folder 1 – Business Correspondence
Physical Description: 1. Correspondence. From: E.L. Hoffman. To: C.A. Mc.Gill, A.H. Rice Co., April 26, 1938.
2. Correspondence. From: C.A. Mc.Gill, A.H. Rice Co. To: E.L. Hoffman, May 5, 1938 (Page 1).
3. Correspondence. From: C.A. Mc.Gill, A.H. Rice Co. To: E.L. Hoffman, May 5, 1938 (Page 2).
4. Correspondence. From: E.L. Hoffman. To: C.A. Mc.Gill, A.H. Rice Co., May 11, 1938 (Page 1).
5. Correspondence. From: E.L. Hoffman. To: C.A. Mc.Gill, A.H. Rice Co., May 11, 1938 (Page 2).
6. Correspondence. From: Dave Schoenfeld, Blossom Manufacturing Co. To: E.L. Hoffman, December 8, 1938.
7. Air Mail Correspondence. From: H.M. Brigham, Wellington Sears Company. To: Hoffman & Russell, December 14, 1938.
8. Original Sent Air, Copy sent regular mail - Correspondence. From: H.M. Brigham, Wellington Sears Company. To: Hoffman &
Russell, December 14, 1938.
9. Correspondence. From: E E Parnin. To: Hoffman & Russell, December 16, 1938.
10. Correspondence. From: Dave Schoenfeld, Blossom Manufacturing Co. To: E.L. Hoffman, December 22, 1938.
11. Correspondence. From: E.L. Hoffman. To: Dave Schoenfeld, December 29, 1938.
12. Air Mail Correspondence. From: Blair, Curtis, Dunne & Hayward Counsellors at Law. To: E.L. Hoffman, September 12, 1939
(Page 1).
13. Air Mail Correspondence. From: Blair, Curtis, Dunne & Hayward Counsellors at Law. To: E.L. Hoffman, September 12, 1939
(Page 2).
14. Correspondence. From: J.M. Russell. To: Ryan Aeronautical Cor., September 3, 1938.
15. Correspondence. From: T. Claude Ryan, Ryan Aeronautical Company. To: Russell & Hoffman, October 18, 1938 (Page 1).
16. Correspondence. From: T. Claude Ryan, Ryan Aeronautical Company. To: Russell & Hoffman, October 18, 1938 (Page 2).
17. Correspondence. From: J.M. Russell. To: Ryan Aeronautical Cor., October 20, 1938 (Page 1).
18. Correspondence. From: J.M. Russell. To: Ryan Aeronautical Cor., October 20, 1938 (Half of Page 2).
19. Correspondence. From: J.M. Russell. To: Ryan Aeronautical Cor., September 20, 1938 (Page 1).
20. Correspondence. From: J.M. Russell. To: Ryan Aeronautical Cor., September 20, 1938 (Page 2).
21. Correspondence. From: J.M. Russell. To: Ryan Aeronautical Cor., November 9, 1938 (Page 1).
22. Correspondence. From: J.M. Russell. To: Ryan Aeronautical Cor., November 9, 1938 (Page 2).
Folder 2 – Unmarked Folders 1, 2, & 3, Business Correspondence
Physical Description: 1. Unmarked Folder #1 – Empty.
2. Unmarked Folder #2 – Contents from years 1938 and 1938 consist of:
a. Western Union Message. From: Short Vega Airplane Co. To: Russell & Hoffman, December 10, 1938.
b. Envelope. From: Vega Airplane Co. To: Hoffman & Russell, November 12, 1938.
c. Correspondence. From: President Mac Short., Vega Airplane Co. To: E.L. Hoffman, October 26, 1938.
d. Airmail Correspondence. From: R.E. Reedy, Vega Airplane Co. To: E.L. Hoffman, November 7, 1938.
e. Correspondence. From: E.L. Hoffman. To: R.E. Reedy, Vega Airplane Co., November 9, 1938.
f. Correspondence. From: R.E. Reedy, Vega Airplane Co. To: E.L. Hoffman, November 10, 1938.
g. Correspondence. From: E.L. Hoffman. To: R.E. Reedy, Vega Airplane Co., November 14, 1938.
h. Correspondence. From: R.E. Reedy, Vega Airplane Co. To: E.L. Hoffman, November 15, 1938.
i. Drawing of chutes on airplane attached to letter from Reedy to Hoffman, November 15, 1938.
j. Correspondence. From: E.L. Hoffman. To: R.E. Reedy, Vega Airplane Co., November 18, 1938.
k. Correspondence. From: R.E. Reedy, Vega Airplane Co. To: E.L. Hoffman, November 19, 1938.
l. Drawing of cables connected to chute on aircraft attached to letter from Reedy to Hoffman, November 19, 1938.
m. Correspondence. From: E.L. Hoffman. To: R.E. Reedy, Vega Airplane Co., November 21, 1938 (Page 1).
n. Correspondence. From: E.L. Hoffman. To: R.E. Reedy, Vega Airplane Co., November 21, 1938 (Page 2).
o. Correspondence. From: R.E. Reedy, Vega Airplane Co. To: E.L. Hoffman, November 23, 1938 (Page 1).
p. Correspondence. From: R.E. Reedy, Vega Airplane Co. To: E.L. Hoffman, November 23, 1938 (Page 2).
q. Airmail – Special Delivery Correspondence. From: R.E. Reedy, Vega Airplane Co. To: E.L. Hoffman, November 25, 1938.
r. Correspondence. From: R.E. Reedy, Vega Airplane Co. To: E.L. Hoffman, November 30, 1938.
s. Correspondence. From: J.M. Russell. To: R.E. Reedy, Vega Airplane Co., December 2, 1938.
t. Airmail – Special Delivery Correspondence. From: R.E. Reedy, Vega Airplane Co. To: J.M. Russell, December 6, 1938 (Page
1).
u. Airmail – Special Delivery Correspondence. From: R.E. Reedy, Vega Airplane Co. To: J.M. Russell, December 6, 1938 (Page
2).
v. Correspondence. From: J.M. Russell. To: R.E. Reedy, Vega Airplane Co., December 7, 1938 (Page 1).
w. Correspondence. From: J.M. Russell. To: R.E. Reedy, Vega Airplane Co., December 7, 1938 (Page 2).
x. Note. From: C.K. Drake, Chief Engineering Records. To: J.M. Russell.
y. Blueprint associated with note. From: J.M. Russell. To: Chief, Material Division Dayton, Ohio, December 28, 1938.
z. Sketch – parachute installation. Drawn November 10, 1938.
aa. Photocopy of blueprint. Parachute Assembly Type S-1.
3. Unmarked Folder #3 – Contents from years 1938 and 1938 consist of:
a. U.S. Department of Commerce Correspondence. From: Wm. D. Appel, Chief, Textile Section. To: E.L. Hoffman, September 1,
1938.
b. Correspondence. From: E.L. Hoffman. To: Chamber of Commerce, September 21, 1938.
c. Correspondence. From: E.L. Hoffman. To: Unknown.
d. Correspondence. From: J.M. Russell. To: Douglas Aircraft Co. Northrup Division, November 14, 1938.
e. Correspondence. From: J.M. Russell. To: Consolidated Aircraft Corp, November 14, 1938.
f. Correspondence. From: J.M. Russell. To: Vivell Aircraft Co., November 14, 1938.
g. Correspondence. From: J.M. Russell. To: Harvey Machine Co., November 14, 1938.
h. Correspondence. From: J.M. Russell. To: Vivell Aircraft Co., November 18, 1938 (Page 1).
i. Correspondence. From: J.M. Russell. To: Vivell Aircraft Co., November 18, 1938 (Page 2).
j. Graph paper with calculations
k. Sketch from Vivell. Main Supporting Parachute. HSR Non-Oscillating Design, November 28, 1938.
l. Sketch from Vivell. Main Supporting Parachute. HSR Non-Oscillating Design, November 28, 1938.
m. Sketch from Vivell. Mounting Holes Design, November 28, 1938.
n. Sketch from Vivell. Mounting Holes Design, November 28, 1938.
o. List of Names and Addresses Receiving Data on Target Airplanes-request for Data R39-E. Major J.C. Shively, Air Corps, November
7, 1938 (Page 1).
p. List of Names and Addresses Receiving Data on Target Airplanes-request for Data R39-E. Major J.C. Shively, Air Corps, November
7, 1938 (Page 2).
q. Correspondence. From: E. Vivell. To: Hoffman & Russell, November 17, 1938.
r. Correspondence. From: E. Vivell. To: J.M. Russell, November 21, 1938 (Page 1).
s. Correspondence. From: E. Vivell. To: J.M. Russell, November 21, 1938 (Page 2).
t. Correspondence. From: Unknown. To: Vivell Aircraft Co., November 22, 1938.
u. Correspondence. From: E. Vivell. To: J.M. Russell, November 25, 1938 (Page 1).
v. Correspondence. From: E. Vivell. To: J.M. Russell, November 25, 1938 (Page 2).
w. Correspondence. From: J.M. Russell. To: Vivell Aircraft Co., November 28, 1938.
x. Correspondence. From J.M. Russell. To: Unknown.
y. Sketch of Parachute deployed over an aircraft.
z. Graph Paper with sketch of Parachute swivel and suspension line terminal.
aa. Graph Paper with sketch of mounting holes and combined swivel and suspension line terminal, December 1, 1938.
bb. Graph Paper with sketch of top of parachute, line terminal fitting, and dimensions.
cc. Correspondence. From: J. Hassler, Duplan Silk Corporation. To: E.L. Hoffman, April 8, 1938.
dd. Translucent paper containing sketches.
ee. Correspondence. From: F.T. Yoshimura, Pacific Trading Co. Inc. To: Hoffman & Russell, April 8th, 1938.
ff. Correspondence. From: Unknown. To: Pacific Dry Goods Co., April 11, 1938.
gg. Correspondence. From: Y. Sakai, The Pacific Dry Goods Co. To: Hoffman & Russell, April 18, 1938.
hh. Correspondence. From: Unknown. To: Pacific Dry Goods Co., April 15, 1938.
ii. Correspondence. From: Y. Sakai, The Pacific Dry Goods Co. To: Hoffman & Russell, April 18, 1938 (Page 1).
jj. Correspondence. From: Y. Sakai, The Pacific Dry Goods Co. To: Hoffman & Russell, April 18, 1938 (Page 2).
kk. Correspondence. From: Unknown. To: Kunihiro & Co. Ltd, July 30, 1938 (Page 1).
ll. Correspondence. From: Unknown. To: Kunihiro & Co. Ltd, July 30, 1938 (Page 1).
mm. Correspondence. From: Unknown. To: Kunihiro & Co. Ltd, July 30, 1938 (Page 2).
nn. Correspondence. From: E.L. Hoffman. To: British Consulate, August 8, 1938.
oo. British Consulate Correspondence. From: H.M. Consul. To: E.L. Hoffman. File C.119, August 11, 1938.
pp. Correspondence. From: Unknown. To: Indian Government Trade Commissioner, August 12, 1938.
qq. India Government Trade Commissioner Correspondence. From: H.S. Malik. To: E.L. Hoffman, August 16, 1938.
rr. Correspondence. From: E.L. Hoffman. To: Indian Government Trade Commissioner, August 22, 1938 (Page 1).
ss. Correspondence. From: E.L. Hoffman. To: Indian Government Trade Commissioner, August 22, 1938 (Page 2).
tt. Letter with no names or address. Contains a reference to the date of September 21, 1938.
uu. Mitsui & Co. Limited Correspondence. From: Habutai Dept. To: Hoffman & Russell, January 19th, 1939.
vv. Tehran Chamber of Commerce Correspondence. From: A.H. Nikpour. To: Hoffman & Russell “Monsieur.” Contains a reference
to the date of September 21, 1938.
ww. Chambre de Commerce de Saigon Correspondence. From: H Ardin, President. To: E.L. Hoffman, November 3, 1938.
xx. Correspondence. From: E.L. Hoffman. To: Silk Guild of America, Inc., December 2, 1938.
Folder 3 – Newspaper Articles
Physical Description: 1. Article on J.M. Russell’s experience with parachutes and his developing company. The San Diego Union Tribune, April 19,
2008.
2. Same article as #1.
3. Article of the Lobe Parachute getting foreign attention, lobe parachute demonstration
4. Articles of the life saving parachute device, parachutes used to entertain crowds, The San Diego Union Tribune, January
29, 1926.
5. Article of how lobe parachute saves pilots when shot down.
6. Obituary of J.M. Russell.
Folder 5 – Parts Drawings/Diagrams
Physical Description: 1. A.T.C Test Requirements: Functional Test (normal pack), Functional Test (twisted lines), Strength Test, Rate of Descent
Test, Live Drop Test.
2. Hoffman-Russell Co. – Parachute Engineering: List of Drawings pertaining to parachute model C.Q.A-24W (Next 12 items are
part of this list).
3. Hoffman-Russell Co. – Spring Quick-Attach FTG – 1-101. By: J. Logan, April 3, 1939.
4. Hoffman-Russell Co. – Plate Susp. Line Pivot – 1-102. By: C. McCabe, June 12, 1939.
5. Hoffman-Russell Co. – Stud Susp. Line Pivot – 1-103. By: C. McCabe, July 29, 1939.
6. Hoffman-Russell Co. – Nut Lock – 1-104. By: Margulis, August 21, 1939.
7. Hoffman-Russell Co. – Retainer Bar Pack Flap Rings – 1-105. By: Margulis, August 21, 1939.
8. Hoffman-Russell Co. – Latch Pin – 1-107. By: C. McCabe, August 9, 1939.
9. Hoffman-Russell Co. – Latch – 1-108. By: C. McCabe, August 9, 1939.
10. Hoffman-Russell Co. – Springs Latch Closing – 1-109. By: Margulis, August 23, 1939.
11. Hoffman-Russell Co. – Closing Bar – 1-112. By: Margulis, August 23, 1939.
12. Hoffman-Russell Co. – Flat Washer Tabulated – 1-117. By: C. McCabe, June 12, 1939.
13. Hoffman-Russell Co. – Rip Cord Pin – 1-118. By: C. McCabe, July 28, 1939.
14. Hoffman-Russell Co. – Harness Rings – 1-119. By: Margulis, August 28, 1939.
15. Hoffman-Russell Co. – Parts List
16. Hoffman-Russell Co. Parts List – Quick Attachable Pack & Fittings.
17. Hoffman-Russell Co. – Plate Susp. Line Pivot – 1-102. By: J. Logan, April 3, 1939 (Chrome Mol’y St’l spec 47-S-14, Cadmium
Plate spec 46-P-1).
18. Hoffman-Russell Co. – Plate Susp. Line Pivot – 1-102. By: C. McCabe, July 29, 1939.
19. Hoffman-Russell Co. – Stud Susp. Line Pivot – 1-103. By: J. Logan, April 3, 1939.
20. Hoffman-Russell Co. – Stud Locking – 1-104. By: J. Logan, April 3, 1939.
21. Hoffman-Russell Co. – Retainer Bar Pack Flap Rings – 1-105. By: J. Logan, April 4, 1939 (16 Ga Brass Spec 46-B-2), Polish).
22. Hoffman-Russell Co. – Retainer Bar – 1-105. By: C. McCabe, July 31, 1939 (Dural).
23. Hoffman-Russell Co. – Bar Lock Bar Ass’y – 1-106. By: J. Logan, April 17, 1939.
24. Hoffman-Russell Co. – Hinge Bracket Lock Bar – 1-107. By: J. Logan, April 17, 1939.
25. Hoffman-Russell Co. – Latch Lock Bar Ass’y – 1-108. By: J. Logan, April 19, 1938.
26. Hoffman-Russell Co. – Latch Lock Bar – 1-108. By: C. McCabe, August 1, 1939 (S.A.E 1025 Steel, 16 Ga, Cadmium Plate Spec
46-P-1).
27. Hoffman-Russell Co. – Spring Lock Bar Ass’y – 1-109. By: J. Logan, April 19, 1938.
28. Hoffman-Russell Co. – Lock Bar Ass’y Center Fitting – 1-110. By: C. McCabe, August 1, 1939.
29. Hoffman-Russell Co. – Lock Bar Ass’y Center Fitting – 1-110. By: J. Logan. April 18, 1939.
30. Hoffman-Russell Co. – Reinf. Bar Lock Bar Ass’y – 1-111. By: J. Logan, April 27, 1939.
31. Hoffman-Russell Co. – Closing Bar Ass’y Central Fitting (3 holes) – 1-112. By: J. Logan, May 10, 1939.
32. Hoffman-Russell Co. – Closing Bar Ass’y Central Fitting (2 holes) – 1-113. By: J. Logan, May 10, 1939.
33. Hoffman-Russell Co. – Spring-Cen. FTG – 1-114. By: C. McCabe, June 10, 1939.
34. Hoffman-Russell Co. – Lock Screw Pivot Stud – 1-115. By J. Logan, May 10, 1939.
35. Hoffman-Russell Co. – Washer Seat Pack – 1-116. By: C. McCabe, June 10, 1939.
36. Hoffman-Russell Co. – Closing Plate (Back) – 1-119. By C. McCabe, August 1, 1939.
37. Hoffman-Russell Co. – Closing Plate (Front) – 1-120. By C. McCabe, August 2, 1939.
Folder 6 – Drawings
Physical Description: 1. Front suspension.
2. Parachute Harness Sketches; Backpack and Seat Pack Parachute Sketches.
3. Parachute System.
4. Seat Pack (Packed) side view; Chest Pack (Front side of page X).
5. Rip Cord Mechanism. Seat Pack; Q.A (Back side of page X).
6. Central Fitting – they show enlargement of details in sketches which will bring out (Front side of page Y).
7. Harness front, back, and over sketches (Back side of page Y).
8. Sketches and numerical figures associated with parachute pack and suspension lines.
9. Central Fitting to show various combinations – Seat pack alone, quick attackable (alone), jumping outfit pack
Folder 7 – Blueprints
Physical Description: 1. Hoffman-Russell Co. Parts List.
2. Hoffman-Russell Co. Parts List – Quick Attachable Pack & Fittings.
3. Hoffman-Russell Co. – Spring Quick-Attach FTG – 1-101. By: J. Logan, April 3, 1939.
4. Hoffman-Russell Co. – Spring Quick-Attach FTG – 1-101. By: J. Logan, April 3, 1939.
5. Hoffman-Russell Co. – Spring Quick-Attach FTG – 1-101. By: J. Logan, April 3, 1939.
6. Hoffman-Russell Co. – Plate Susp. Line Pivot – 1-102. By: J. Logan, April 3, 1939 (Chrome Mol’y St’l spec 47-S-14, Cadmium
Plate spec 46-P-1).
7. Hoffman-Russell Co. – Plate Susp. Line Pivot – 1-102. By: J. Logan, April 3, 1939 (Chrome Mol’y St’l spec 47-S-14, Cadmium
Plate spec 46-P-1).
8. Hoffman-Russell Co. – Plate Susp. Line Pivot – 1-102. By: C. McCabe, June 12, 1939 (S.A.E. 2330 Steel, Cad. Plate spec
46-P-1, 125,000 lb/in).
9. Hoffman-Russell Co. – Stud Susp. Line Pivot – 1-103. By: J. Logan, April 3, 1939.
10. Hoffman-Russell Co. – Preliminary Print of #9 (Mold on back).
11. Hoffman-Russell Co. – Stud Susp. Line Pivot – 1-103. By: J. Logan, April 3, 1939.
12. Hoffman-Russell Co. – Stud Locking – 1-104. By: J. Logan, April 3, 1939.
13. Hoffman-Russell Co. – Stud Locking – 1-104. By: J. Logan, April 3, 1939.
14. Hoffman-Russell Co. – Stud Locking – 1-104. By: J. Logan, April 3, 1939.
15. Hoffman-Russell Co. – Retainer Bar Pack Flap Rings – 1-105. By: J. Logan, April 4, 1939.
16. Hoffman-Russell Co. – Bar Lock Bar Ass’y – 1-106. By: J. Logan, April 17, 1939.
17. Hoffman-Russell Co. – Bar Lock Bar Ass’y – 1-106. By: J. Logan, April 17, 1939.
18. Hoffman-Russell Co. – Bar Lock Bar Ass’y – 1-106. By: J. Logan, April 17, 1939.
19. Hoffman-Russell Co. – Hinge Bracket Lock Bar – 1-107. By: J. Logan, April 17, 1939.
20. Hoffman-Russell Co. – Hinge Bracket Lock Bar – 1-107. By: J. Logan, April 17, 1939.
21. Hoffman-Russell Co. – Hinge Bracket Lock Bar – 1-107. By: J. Logan, April 17, 1939.
22. Hoffman-Russell Co. – Latch Lock Bar Ass’y – 1-108. By: J. Logan, April 19, 1938.
23. Hoffman-Russell Co. – Latch Lock Bar Ass’y – 1-108. By: J. Logan, April 19, 1938.
24. Hoffman-Russell Co. – Latch Lock Bar Ass’y – 1-108. By: J. Logan, April 19, 1938.
25. Hoffman-Russell Co. – Spring Lock Bar Ass’y – 1-109. By: J. Logan, April 19, 1938.
26. Hoffman-Russell Co. – Spring Lock Bar Ass’y – 1-109. By: J. Logan, April 19, 1938.
27. Hoffman-Russell Co. – Spring Lock Bar Ass’y – 1-109. By: J. Logan, April 19, 1938.
28. Hoffman-Russell Co. – Lock Bar Ass’y Center Fitting – 1-110. By: J. Logan, April 18, 1939.
29. Hoffman-Russell Co. – Lock Bar Ass’y Center Fitting – 1-110. By: J. Logan, April 18, 1939.
30. Hoffman-Russell Co. – Reinf. Bar Lock Bar Ass’y – 1-111. By: J. Logan, April 27, 1939.
31. Hoffman-Russell Co. – Reinf. Bar Lock Bar Ass’y – 1-111. By: J. Logan, April 27, 1939.
32. Hoffman-Russell Co. – Reinf. Bar Lock Bar Ass’y – 1-111. By: J. Logan, April 27, 1939.
33. Hoffman-Russell Co. – Closing Bar Ass’y Central Fitting (3 holes) – 1-112. By: J. Logan, May 10, 1939.
34. Hoffman-Russell Co. – Closing Bar Ass’y Central Fitting (3 holes) – 1-112. By: J. Logan, May 10, 1939.
35. Hoffman-Russell Co. – Closing Bar Ass’y Central Fitting (3 holes) – 1-112. By: J. Logan, May 10, 1939.
36. Hoffman-Russell Co. – Closing Bar Ass’y Central Fitting (2 holes) – 1-113. By: J. Logan, May 10, 1939.
37. Hoffman-Russell Co. – Closing Bar Ass’y Central Fitting (2 holes) – 1-113. By: J. Logan, May 10, 1939.
38. Hoffman-Russell Co. – Closing Bar Ass’y Central Fitting (2 holes) – 1-113. By: J. Logan, May 10, 1939.
39. Hoffman-Russell Co. – Spring-Cen. FTG – 1-114. By: C. McCabe, June 10, 1939.
40. Hoffman-Russell Co. – Lock Screw Pivot Stud – 1-115. By J. Logan, May 10, 1939.
Folder 8 – Report No. 706
Physical Description: 1. Landing Gear Analysis Preliminary Design, October 25, 1938.
2. Landing Gear Analysis Preliminary Design Signature page, October 25, 1938.
3. Photograph of parachute and weight attachment to an airplane, November 14, 1938
4. Photograph of parachute and weight after the drop, November 14, 1938
5. Photograph of parachute and weight after the drop, November 12, 1938
Folder 9 – Full Scale Blueprints