SIRAM Industries [IMAGE]
6375 S. Arville, Las Vegas, Nevada 89118
Chief Technical Officer: Stuart D. Waymire, BSME
Phone: 702.279.1385
FAX: 702.263.8842

Our Pages

Gas Properties
Ramjet Design Data
Navier Stokes
One Dimensional Gas Flow
Ram Designs
Pulsejet Designs
Valveless Pulsejets
Nuclear Ram History
LittleHenry Ram Helicopter
Bomarc Ram Missle
Siram Industries A company devoted to building innovative fluidic propusion devices. Fluidic devices are extremely lightweight and inexpensive with no moving parts to wear out, but in the past these advantages have been outweighed by noise, vibration and thermo-materials problems. Our curent Siram XP-1 Ramjet prototype attempts to address many of these problems and will begin testing May 2001. Investment and design opportunities are available.
HISTORY Pulsejets and ramjets are two of the simplest propulsive engines that can be made, though both have complicated fluid dynamics underlying their physical simplicity. Both convert a portion of their exhaust energy into intake compression through fluidic means (the ramjet through forward motion, the pulsejet through overexpansion creating an inlet vacuum).

The ramjet concept has been attributed to Rene Lorin in 1913, though he considered only subsonic flight. A German patent was issued to Albert Fono in 1928 for a ramjet engine designed to exceed Mach 1. By 1935 Rene Leduc had tested a small ramjet to 679 mph. During 1939 several engine components were tested at speeds up to Mach 2.35. In the 1950's the US's X-7A achieved Mach 4.3. Since that time there have been many developmental and operational missiles, some of which have reached speeds well in excess of Mach 5.

In parallel development, the pulsejet engine became the powerplant of the V1 buzzbomb of WWII. Research continued after the war, but practical application has always been hindered by noise and vibration problems.

While modern turbojet engines drive the majority of commercial airlines, for small private planes there is an argument to be made for lightweight fluidic engines with no internal moving parts. The challenge is to build an efficient fluidic engine that can operate from zero relative velocity with low vibration, low noise and acceptable thermal material stress. Siram Industries is developing a series of such devices, utilizing combined fluidic ram and pulsejet regimes, aimed at the small airplane and boat market. Industrial applications as heaters and blowers are also possible.

We Live and Work in Las Vegas, home of the Nevada Test Site and Nellis Air Force Base. Our goal is to produce thrust with the simplest fluidic designs possible. Contact us at
Bomarc Ramjet Missile
Navajo Ramjet