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The chief aim of man is to glorify God and enjoy Him forever. - Westminster Catechism, 1648   Another aim of man is to build things that run very HOT and very LOUD and move really, really FAST ! - Larry Cottrill, 2005   Reynstodyne Fokus 'Short Lady' valveless pulsejet engine running on propane vapor   Photo Copyright 2004 Steve Bukowsky   HEAR a valved pulsejet start and run (classic Dynajet, compressed air startup): (Total time = 30 sec) ... COMPARE a valveless pulsejet start and run (Elektra I, electric blower startup): (Total time = 45 sec)

Corporate Statement of Purpose To the glory of God, we will endeavor... To advance the state of the art of air-breathing reaction powerplant design toward greater simplicity, reliability, economy, maintainability and ease of use; To offer the serious hobbyist a new standard of safe, reliable, efficient and affordable small jet propulsion systems; To profit fairly, reasonably and in good conscience from our creativity and effort; To provide a dedicated portion of earned profit to selected organizations which labor to better the lives of the needy, heal the sick, relieve the oppressed and set free the enslaved; And to generate from our efforts a significant Return on Investment to every person who has materially contributed to the success and advancement of this enterprise. To these ends, we hereby resolve and commit ourselves  TO  BUILD  ENGINES  for  the  New  Millenium  of  Flight

Fo Mi Chin II Valveless Pulsejet combustion chamber & intake detail - Photo Copyright 2005 Larry Cottrill

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    C O T T R I L L - D E S I G N E D   E N G I N E S . . .
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Reynstodyne Fokus FWE 'Lady Anne Boleyn'     - Type: Reynst Breathing Valveless Pulsejet     - Evaluation: SUCCESSFUL [to be independently verified]     - Performance: 2.6 lb (1.3 kg) static thrust, propane vapor fueled     - Features: Easy starting, good running, throttleable     - Design disclosure: August 2006     - Prototype: Independently built & tested Original post in Kenneth Moller's Valveless Pulsejet Forum First run post (scroll down to mid-page post by 'James D')

Reynstodyne Fokus FWE 'Lady Guinevere'     - Type: Quasi-Concentric Reynst Breathing Valveless Pulsejet     - Evaluation: UNKNOWN [to be independently built & tested]     - Performance: UNKNOWN     - Features: Easy starting, good running, throttleable     - Design disclosure: February 2006     - Prototype: To be independently built & tested Original post in Kenneth Moller's Valveless Pulsejet Forum

Reynstodyne 'Lock Reynst Monster'     - Type: Fully Concentric Reynst Breathing Valveless Pulsejet     - Evaluation: UNKNOWN [to be independently built & tested]     - Performance: UNKNOWN     - Features: Easy starting, good running, throttleable, low cost     - Design disclosure: February 2005     - Prototype: To be independently built & tested Original post in Kenneth Moller's Valveless Pulsejet Forum Dimension drawing post in Kenneth Moller's Valveless Pulsejet Forum

Reynstodyne Whale Shark     - Type: Reynst Breathing Valveless Pulsejet     - Evaluation: UNKNOWN [to be independently built & tested]     - Performance: UNKNOWN     - Features: Easy starting, good running, throttleable, low cost, extremely easy construction     - Design disclosure: November 2005     - Prototype: To be independently built & tested Original post in Kenneth Moller's Valveless Pulsejet Forum

Reynstodyne Fokus FWE V 'Thin Lady'     - Type: Reynst Breathing Valveless Pulsejet     - Evaluation: UNKNOWN [to be independently built and tested]     - Performance: UNKNOWN     - Features: Easy starting, good running, throttleable, low cost, thin profile, light weight     - Design disclosure: November 2005     - Prototype: To be independently built & tested Original post in Kenneth Moller's Valveless Pulsejet Forum

Reynstodyne Fokus FWE IV 'Smooth Lady'     - Type: Quasi-Concentric Reynst Breathing Valveless Pulsejet     - Evaluation: SUCCESSFUL [to be independently verified]     - Performance: UNKNOWN     - Features: Easy starting, good running, throttleable, low cost, thin profile, light weight     - Design disclosure: August 2005     - Prototype: Built & tested in-house September 2005 Original post in Kenneth Moller's Valveless Pulsejet Forum First run post in Kenneth Moller's Valveless Pulsejet Forum

Reynstodyne Elektra IV 'Black Princess'     - Type: Reynst Breathing Valveless Pulsejet     - Evaluation: UNKNOWN [currently under in-house testing]     - Performance: UNKNOWN     - Features: Easy starting, good running, throttleable, low cost, thin profile, light weight     - Design disclosure: July 2005     - Prototype: Built & tested in-house 2005 Original post in Kenneth Moller's Valveless Pulsejet Forum

Reynstodyne FMC II   (easy construction version of Fo Mi Chin II)     - Type: Quasi-Concentric Reynst Breathing Valveless Pulsejet     - Evaluation: UNKNOWN [to be independently built & tested]     - Performance: UNKNOWN     - Features: Easy starting, good running, throttleable, low cost, thin profile, light weight     - Design disclosure: July 2005     - Prototype: To be independently built & tested Original post in Kenneth Moller's Valveless Pulsejet Forum

Reynstodyne Fokus FWE III 'Sveldt Lady'     - Type: Quasi-Concentric Reynst Breathing Focused Wave Valveless Pulsejet     - Evaluation: SUCCESSFUL, independently verified     - Performance: UNKNOWN     - Features: Easy starting, good running, throttleable, low cost, thin profile     - Design disclosure: May 2005     - Prototype: To be independently built & tested 2005 Original post in Kenneth Moller's Valveless Pulsejet Forum Other related threads from the Valveless Pulsejet Forum: Another (Crazy?) Idea for Engine Kits FWE III Pulse Jet kit Construction

Reynstodyne Fokus 'French Skirted Lady'     - Type: Reynst Breathing Augmented Focused Wave Valveless Pulsejet     - Evaluation: UNSUCCESSFUL [unable to achieve self-sustained operation]     - Performance: UNKNOWN     - Features: Integral skirt type thrust augmentor     - Design disclosure: April 2005     - Prototype: Built in-house April 2005, independently tested April 2005, Mike Everman Original post in Kenneth Moller's Valveless Pulsejet Forum

Reynstodyne Fo Mi Chin Type II     - Type: Quasi-Concentric Reynst Breathing 'Pressure Can' Valveless Pulsejet     - Evaluation: SUCCESSFUL, independently verified     - Performance: UNKNOWN     - Features: Easy starting, good running, throttleable, low cost, thin profile, very light weight [15.3 ounces]     - Design disclosure: April 2005     - Prototype: Built in-house, independently tested April 2005, Bruno Ogorelec Original post in Kenneth Moller's Valveless Pulsejet Forum First run post in Kenneth Moller's Valveless Pulsejet Forum 'Death of Fo Mi Chin' post in Valveless Pulsejet Forum

Reynstodyne Henri Prototype     - Type: Reynst Breathing Quasi-Concentric Valveless Pulsejet     - Evaluation: UNKNOWN [currently under in-house testing]     - Performance: UNKNOWN     - Features: Compact, low cost, thin profile, light weight     - Design disclosure: April 2005     - Prototype: Built & tested in-house April 2005 Original post in Kenneth Moller's Valveless Pulsejet Forum

Reynstodyne Fokus 'Short Lady'     - Type: Reynst Breathing Focused Wave Valveless Pulsejet     - Evaluation: SUCCESSFUL, independently verified     - Performance: Easy starting, good running     - Features: Easy starting, good running, throttleable, low cost, light weight     - Design disclosure: 2004     - Prototype: Independently built & tested 2004, Steve Bukowsky Construction Page 1 Construction Page 2 & Testing Original post in Kenneth Moller's Valveless Pulsejet Forum First run post in Kenneth Moller's Valveless Pulsejet Forum More independent developments from the Valveless Pulsejet Forum: Stainless FWE with small intake runs at -3F! New FWE on the block Successful FWE Run With Video A new propane line, Larry you better sit down for this :D Some Fairly Nice New FWE Pics New Set of Linear FWE Plans Type07 FWE Another Classic FWE Built & Run Short Lady FWE Build!

Reynstodyne Fo Mi Chin Prototype     - Type: Reynst Breathing 'Pressure Can' Valveless Pulsejet     - Evaluation: MODERATELY SUCCESSFUL     - Performance: UNKNOWN     - Features: Easy starting, good running, throttleable, low cost, large overall length [1.2 metres]     - Design disclosure: 2004     - Prototype: Built in-house 2004, tested in-house 2005 Original post in Kenneth Moller's Valveless Pulsejet Forum First run post in Kenneth Moller's Valveless Pulsejet Forum

Reynstodyne Elektra II 'Five Dollar Pulsejet'     - Type: Reynst Breathing Ultra-Low-Cost Valveless Pulsejet     - Evaluation: SUCCESSFUL     - Performance: UNKNOWN     - Features: Easy starting, good running, throttleable, easy construction, very low cost     - Design disclosure: 2004     - Prototype: Built & tested in-house 2004 Original post in Kenneth Moller's Valveless Pulsejet Forum First run post in Kenneth Moller's Valveless Pulsejet Forum

Reynstodyne Elektra I 'Five Dollar Pulsejet'     - Type: Reynst Breathing Ultra-Low-Cost Wave Valveless Pulsejet     - Evaluation: MODERATELY SUCCESSFUL, independently verified     - Performance: LOW THRUST     - Features: Easy starting, good running, throttleable, easy construction, very low cost     - Design disclosure: 2004     - Prototype: Independently built & tested 2004, Steve Bukowsky Construction Page Test Journal Page Original post in Kenneth Moller's Valveless Pulsejet Forum First run post in Kenneth Moller's Valveless Pulsejet Forum

'Maggie Muggs' No-Weld Low-Speed Ramjet     - Type: No-Weld Bonded-Construction Ramjet     - Evaluation: SUCCESSFUL, independently verified     - Performance: UNKNOWN     - Features: No-weld construction, good running, throttleable, very light weight [10.5 ounces]     - Design disclosed: 2003     - Prototype: Built in-house 2003 - Independently built & tested May 2005, Ben Koopman Construction Page 1 Construction Page 2 Test Firing Page [Page 3] Original post in Kenneth Moller's Ramjet Forum [old forums] First run post in Kenneth Moller's Ramjet Forum

SFOA Ball Bearing Valve Pulsejet     - Type: Poppet Valve Pulsejet     - Evaluation: UNKNOWN [construction incomplete]     - Performance: UNKNOWN     - Features: Easy valve maintenance, low cost     - Design disclosed: 2002     - Prototype: Under construction Construction Page

Tiny Myers Valveless Pulsejet     - Type: Myers Type Valveless Pulsejet     - Evaluation: UNSUCCESSFUL [unable to achieve self-sustained operation]     - Performance: UNKNOWN     - Features: Extreme simplicity, low cost     - Design disclosed: 2002     - Prototype: Built & tested in-house 2002 First run post in Kenneth Moller's Valveless Pulsejet Forum [old forums]

Reynstodyne Shark Tiny Valveless Pulsejet     - Type: Reynst Breathing Valveless Pulsejet     - Evaluation: UNSUCCESSFUL [unable to achieve self-sustained operation]     - Performance: UNKNOWN     - Features: Simplicity, low cost     - Design disclosed: 2002     - Prototype: Built & tested in-house 2002 Construction Article - jetZILLA Online Magazine

Synchrodyne Valveless Pulsejet     - Type: Synchronized Pressure Reflection Valveless Pulsejet     - Evaluation: UNSUCCESSFUL [unable to achieve self-sustained operation]     - Performance: UNKNOWN     - Features: Simplicity, low cost     - Design disclosed: 2001     - Prototype: Built & tested in-house 2001 Construction Page Test Journal Page

Pulsodyne Tiny Valveless Pulsejet     - Type: Flow Rectification Valveless Pulsejet     - Evaluation: UNSUCCESSFUL [unable to achieve self-sustained operation]     - Performance: UNKNOWN     - Features: Simplicity, low cost     - Design disclosed: 2001     - Prototype: Built & tested in-house 2001

Cyclodyne Cyclical-Flow Engine     - Type: Constant-Combustion Cyclical-Flow Jet Engine     - Evaluation: UNKNOWN [construction incomplete]     - Performance: UNKNOWN     - Features: Easy maintenance, low cost     - Design disclosed: 2001     - Prototype: Construction on hold Rejected by NASA!

Poster 6 in the series 'International Year of the Valveless Pulsejet' Photo Copyright 2005 Cottrill Cyclodyne Corporation

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    O U R   O W N   P R O D U C T S . . .
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Larry Cottrill, Founder, President and Director of Product Development Photo Copyright 2003 Cottrill Cyclodyne Corporation

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    F R I E N D S . . .
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