---
title: "Jack Parsons"
chunk: 4/16
source: "https://en.wikipedia.org/wiki/Jack_Parsons"
category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T04:32:07.745794+00:00"
instance: "kb-cron"
---

In April 1937, Caltech mathematician Qian Xuesen joined the Group. Several months later, Weld Arnold, a Caltech laboratory assistant who worked as the Group's official photographer, also joined. The main reason for Arnold's appointment to this position was his provision of a donation to the Group on behalf of an anonymous benefactor. They became well known on campus as the "Suicide Squad" for the dangerous nature of some of their experiments and attracted attention from the local press. Parsons himself gained further media publicity when he appeared as an expert explosives witness in the trial of Captain Earl Kynette, the head of police intelligence in Los Angeles who was accused of conspiring to set a car bomb in the attempted murder of private investigator Harry Raymond, a former LAPD detective who was fired after whistleblowing against police corruption. When Kynette was convicted largely on Parsons' testimony, which included his forensic reconstruction of the car bomb and its explosion, his identity as an expert scientist in the public eye was established despite his lack of a university education. While working at Caltech, Parsons was admitted to evening courses in chemistry at the University of Southern California (USC), but distracted by his GALCIT workload he attended sporadically and received unexceptional grades.
By early 1938, the Group had made their static rocket motor, which originally burned for three seconds, run for over a minute. In May that year, Parsons was invited by Forrest J Ackerman to lecture on his rocketry work at Chapter Number 4 of the Los Angeles Science Fiction League (LASFL). Although he never joined the society, he occasionally attended their talks, on one occasion conversing with a teenage Ray Bradbury. Another scientist to become involved in the GALCIT project was Sidney Weinbaum, a Jewish refugee from Europe who was a vocal Marxist; he led Parsons, Malina, and Qian in their creation of a largely secretive communist discussion group at Caltech, which became known as Professional Unit 122 of the Pasadena Communist Party. Although Parsons subscribed to the People's Daily World and joined the American Civil Liberties Union (ACLU), he refused to join the American Communist Party, causing a break in his and Weinbaum's friendship. This, coupled with the need to focus on paid employment, led to the disintegration of much of the Rocket Research Group, leaving only its three founding members by late 1938.

=== Embracing Thelema; advancing JATO and foundation of Aerojet: 1939–1942 ===