[Diy_efi] Rotary tuning

Tue Feb 13 17:44:38 UTC 2007

Wow, thanks for all the support.

My main issue as of currently is finding a reasonable (cost) gearset
for the eccentric and stationary gears. I could use the wire EDM here
at work to make a set but this is hardly cost effective especially if
i want to make more than one. 

if anyone has cad/cam software and wants to look at what i've got so
far virtual gibbs will output the file in lots of formats.

all i have at this point is the housing and rotor shape along with the
gear profiles and diameters plugged in. this however was rediculously
complicated as i had to write custom macros for my CPU to program
these shapes with enough accuracy to be effectively usable.

Mike

On Tue, 13 Feb 2007 22:52:18 +0800, you wrote:

>At 09:06 AM 2/13/07, you wrote:
>>Reason for "DynaCam" disappearing:
>>http://www.axialvectorengine.com/press_release-30.html
>
>Interesting, havent looked at the patent yet, not much graphic on
>the site, anyone have an engine animation to hand, my son would
>go nuts over that, hes starting to get into engines more and more
>and we are building a coffee cup stirling as family project on a shoestring
>using certain "pc consumables"  ;)
>
>Regards
>
>Mike
>
>
>
>
>
>
>>-----Original Message-----
>>From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org] On
>>Behalf Of Ernest Buckler
>>Sent: Monday, February 12, 2007 12:59 PM
>>To: tmc_mike_yates at sbcglobal.net; diy_efi at diy-efi.org
>>Subject: Re: [Diy_efi] Rotary tuning
>>
>>Mike,
>>Do you know about the DynaCam engine?  People thought it was a swash-plate 
>>engine, but it actually has a 4-lobe sinusoidal crankshaft.  12 double-ended
>>
>>pistons with central roller bearing push this crank around.  Plate cams at 
>>each end operated normal valves in the 6-cyl. heads.   VERY torquey, very 
>>smooth, lower parts count.  FAA actually certified a 300 hp version for use 
>>in light aircraft AND  HELICOPTERS in 1957, with a TBO of 1500 hrs, sayng 
>>they expected that interval to be increased, as they found no appreciable 
>>wear at 1500 hours.   The Navy used a single-sided version of this as a 
>>torpedo motor for many years, was Top Secret until turbines replaced it.  I 
>>knew a guy who overhauled these in the practice torps, says they were 
>>"coffee-can" size.   Serious efforts to commercialize it have been made, 
>>last I heard the Co. still existed at Torrance airport, but there was very 
>>little about it on the web, last I looked.  Rumor has many reasons for 
>>company failure, most bad management.   Cool thing is that it still uses 
>>std. piston rings, also normal valves & springs, so no re-inventing the 
>>wheel, as there is on Wankels, with all their side and tip sealing 
>>challenges.
>>
>>Ernie B
>>
>>
>>
>>
>>----- Original Message ----- 
>>From: "Mike Yates" <tmc_mike_yates at sbcglobal.net>
>>To: <diy_efi at diy-efi.org>
>>Sent: Monday, February 12, 2007 12:12 PM
>>Subject: Re: [Diy_efi] Rotary tuning
>>
>>
>>the rotary parts have no different requirements except you usually use
>>2 spark plugs per chamber due to the distance the flame front has to
>>travel.   plans at this point are for a go-kart application but who
>>knows i just want to experiment with larger eccentricity (i.e.
>>basically stroke) to see if any reasonable amount of torque can be
>>made from a rotary engine.
>>
>>plus they sound so damn cool at 9k rpms
>>
>>Mike
>>
>>
>>On Mon, 12 Feb 2007 12:22:03 -0600, you wrote:
>>
>>>Hi Mike no real suggestions for parts -- are coil packs or ignition
>>>pickups different for the rotary or can you use conventional engine
>>>parts?  Mostly just wanted to write and say this sounds really cool and
>>>to keep the list posted on how you do.  What do you plan to do with the
>>>engine?
>>>
>>>--steve
>>>
>>>> -----Original Message-----
>>>> From: diy_efi-bounces at diy-efi.org
>>>> [mailto:diy_efi-bounces at diy-efi.org] On Behalf Of Mike Yates
>>>> Sent: Monday, February 12, 2007 11:25 AM
>>>> To: diy_efi at diy-efi.org
>>>> Subject: [Diy_efi] Rotary tuning
>>>>
>>>> ok here goes...I work with CAD/CAM software all day at work (aerospace
>>>> machining) so i'm drawing up plans for a small displacement
>>>> ~1.0 liter rotary engine 3 rotor most likely with a larger
>>>> eccentricity than the 13b.
>>>>
>>>> long story short i dont want to slap a carb on this i'd like
>>>> to go FI anyone have any ideas on what i need from the junk
>>>> yard or where i could source parts like coil packs and an
>>>> ignition pick-up/driver?
>>>>
>>>> if anyone has gibbs cam or can open .igs files i'd be happy
>>>> to share the product of my sleepless nights.
>>>>
>>>> Mike
>>>> _______________________________________________
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>>
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>
>
>
>Regards from
>
>
>Mike
>Perth, Western Australia
>VK/VL Commodore Fuse Rail panel that wont warp, twist or melt, guaranteed  !
>Twin tyres for most sedans, trikes and motorcycle sidecars
>http://niche.iinet.net.au
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