Armored 
Medical Research Laboratory 
Fort Knox, Kentucky 
Third Partial Report 
On 
PROJECT NO. 5-12 - SEATING DESIGNING AND PLACING 
IN RELATION TO FaTIGUE 
Subject: Seat Cushions for Truck (4x4) J Ton (Peep) 
Project No. 5-12 
17 October 1945 ARMORED MEDICAL RESEARCH LABORATORY 
Fort Knox, Kentucky 
Project No. 5-12 
SPMEA 749.2-12 
17 October 1945 
SEAT CUSHIONS FOR TRUCK (4 x 4) t TON (PEEP) 
1* PROJECT NO* 5-12 - Seating Designing and Placing in Relation to 
Fatigue. Third partial report. 
a. Authority; Letter Conmanding General, Headquarters Armored Force, 
Fort Knox, Kentucky, File 400.112/6 GNOHD, dated September 24, 1942. 
b, Purpose; To study improvement in riding comfort of the truck, 
i ton (peep) by installation of more adequate seat cushions. 
2, DISCUSSION; 
Reference is made to this laboratory*s second partial report on the 
above subject dated 17 February 1945* Since this report further investigation 
has been made and samples obtained of a new seat cushion (Combi-Flex) under 
development by Firestone Industrial Products Company, Chicago, Illinois. The 
experimental cushions investigated have been modified to meet requirements 
this laboratory considers desirable for seat cushions of this type in general. 
3. PROGUDURE: 
An experimental installation in a laboratory peep was made using the 
above seat cushions, (see attached photographs). The peep was driven over 
various terrains and criticism obtained from many observers. 
4, CfiNCmSIQSa: 
(l) The seat cushion under consideration, installed in a peep, results 
in improved riding comfort and reduced fatigue for driver and occupants. 
(2) The seat cushion requires little modifications to adapt it for 
installation in peep. 
(3) The modified seat cushion alone will not adequately solve the 
seating problem for the £ ton truck (peep). Other improvements discussed in 
this laboratoryfs second partial report dated 17 February 1945 should also be 
considered. JT. RECOMMENDATIONS: 
(1) That action be taken to improve £ ton truck (peep) seats to 
provide increased riding comfort! reduce fatigue and guard against low back 
injury. 
(2) That seat cushions of the type under discussion be considered 
in development of seats to meet requirements of Recommendation (l) above* 
(3) That other requirements listed in Armored Medical Research Lab- 
second partial report be considered in development of adequate seats 
for i ton truck. 
NOTE: The recommendations as set forth in this project have been concurred in 
by Colonel Louis V, Hightower, President, Amy Ground Forces Board No, . 
Submitted by: 
Lester B, Roberts, Major, SnC 
James W. Gregg, F-4 
APPROVED 
WILLIAM B. BEAN 
Major, Medical Corps 
Commanding 
1 Incl. (Photographs 1 thru 5) 
2 FIGURE 1 FIGURE * FIGURE 3 FIGURE 4 FIGURE 5