Front axle material

Herman · **Posted:** Thu Dec 17, 2009 10:59 am

Feel free to post whatever you have. Both Bugatti related and from other work.

If things run out of hand, I can always move it into the "off topic" section, but at the moment I do not feel the need for that.

Udolahr · **Posted:** Tue Dec 22, 2009 1:50 am

con rod system 110 Le Rhone and 120 Oberursel . Both engines have 9 cylinders and 15 liters .

Lazarus · **Posted:** Tue Dec 22, 2009 10:12 am

Udolahr wrote:

con rod system 110 Le Rhone and 120 Oberursel . Both engines have 9 cylinders and 15 liters .

What a strange way to make an engine.Very complicated and expensive too.I prefer the Wright Cyclone Master rod and slave rods.Used also by many other companies,including Bristol.But fascinating to see,so show us more please !

Udolahr · **Posted:** Wed Dec 23, 2009 2:06 pm

Normal Radial engines like the Wright Cyclone have a Master Rod and attached to the master rod the slave rods . All this engines have for every cylinder a different timing . Different timing for the valves and ignition . Because of this different timing , some cylinders are to hot and some are to cold . Only one cylinder has the accurate timing and temparature .So , the con rod system from a Le Rhone and Oberursel is much better , same timing for all cylinders .

Lazarus · **Posted:** Thu Dec 24, 2009 3:02 pm

Udolahr wrote:

Normal Radial engines like the Wright Cyclone have a Master Rod and attached to the master rod the slave rods . All this engines have for every cylinder a different timing . Different timing for the valves and ignition . Because of this different timing , some cylinders are to hot and some are to cold . Only one cylinder has the accurate timing and temparature .So , the con rod system from a Le Rhone and Oberursel is much better , same timing for all cylinders .

I cannot argue with you on a subject about which I know very little,however I feel that I should point out that thousands of these " problematic" wright cyclone engines droned out over europe night after night between 1942 and 1945.I do not recall any discussion about poor timing !

Udolahr · **Posted:** Sun Dec 27, 2009 11:46 pm

for example , a 5 cylinder radial engine . Top cylinder is the master rod cylinder , all timing is ok . First cylinder left ignition plus 4 degrees , second cylinder left 8 degrees plus . First cylinder right 4 degrees minus , second cylinder right 8 degrees minus . A 5 cylinder radial is not so bad like a 9 cylinder radial . It was possible because the compresion ratio is from 4:1 to 6,5:1 . Maximum ref. from 2200 to 2600 . Hours bevore overhoul 600 to 1000 . And after every flight the mechanics did look after the engine .

Herman · **Posted:** Mon Dec 28, 2009 7:25 am

I know little of radial engines as well, but a guy who made model scale 9 and 18 (!!) cilinder radial engines told me that well balanced fuel distribution was a challenge as well. I didn't argue about that. Too little knowlegde.

Udolahr · **Posted:** Mon Jan 11, 2010 12:06 am

GCL-Wales wrote:

Why not give us some information about your de Dietrich "recreation".

When I spoke to you in Strasbourg you said you used crankcase castings from Richard Day. What about the rest of the car ? When will it be running ? How much will it have cost ? Is it going to be raced ?

A bit of advice : if you leave it parked-up in a van overnight don't use a smart new Mercedes. Like the MNA with their Royale, use a skanky old Renault Master which no one can be bothered to thieve. And avoid Hounslow.

I need a little more time , and I will start a Thread about the Type5 recreation. The engine is back in the car and ready to fire up . One thing for sure , after the car is ready , Paris - Madrid is a must !
Do you have a foto from the stolen Type5 ? In what condition was the car ? Engine running ? Roadworthy ?

Front axle material

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