[4]

Five Cylinder Radial With Ohc

[3]
[10] Like what you see?
Click here to donate to this forum and upgrade your account!
D

Deleted member 17524

Guest - Please Register!
Guest - Please Register!
kvt -- The rod you are calling solid is known as the "Master Rod". All others in that bank are known as "Slave Rods" and are connected to the "Master Rod". The dreve shaft is connected to the "Master Rod" only.

"Billy G"
 

kvt

Active User
H-M Supporter - Gold Member ($25)
Joined
Oct 21, 2014
Messages
2,079
Thanks Bill, I though it was something like that. I will continue to watch, I want to see how the Slave rods attach also. This has been an interesting build to watch and learn from
Ken
 
D

Deleted member 120

Guest - Please Register!
Guest - Please Register!
Hi Ken
I hope this helps.

img006.jpg
The inner ends of the slave rods are similar to the small ends, fixed into a fork cut in the side of the master rod and fixed with a free floating pin that is held in place by two thin steel plates either side of the big end.
It is interesting to note that the big end on a radial engine is not subjected to reverse loads it is constantly being handed on to the next cylinder in the firing order and the power strokes overlap. This is even more so when the engine is supercharged as we then always have a positive pressure above the piston.
Brian.
 
D

Deleted member 120

Guest - Please Register!
Guest - Please Register!
Hi wileel
The main material I will need is the 6082 for the front of the crank case and the nose piece . and the 4340 for the crank.
it is not the cost of the material so much, but the postage, it often exceeds the value of the contents. One of the downsides of moving to the middle of the Mediterranean sea for retirement
Brian.
 

kvt

Active User
H-M Supporter - Gold Member ($25)
Joined
Oct 21, 2014
Messages
2,079
Brian, thanks for the info, the fact that it is a Fork on the big end makes sense. And I can see where it spreads the load to the other areas as well.
 

wileel

Active Member
Registered
Joined
Jul 12, 2017
Messages
60
I just looked up a quote to send 30lbs to Italy via FedEx...WOW!!! I didn't see that coming...figured it would be pricy but DAMN!
 

Bob Korves

H-M Supporter - Sustaining Member
H-M Platinum Supporter ($50)
Joined
Jul 2, 2014
Messages
6,815
I just looked up a quote to send 30lbs to Italy via FedEx...WOW!!! I didn't see that coming...figured it would be pricy but DAMN!
I sent a 4 ounce part to Fernballen in Sweden via USPS small flat rate box, the best rate I could find in the U.S. It was $35.25 and has no tracking after leaving the U.S. And, sure enough, it has been 20 days and he has not received it yet. Fedex and the others were well over $100 for the same 4 ounce package to Sweden.
 
D

Deleted member 120

Guest - Please Register!
Guest - Please Register!
Hi wileel
Thanks for the thought, You may be surprised that it means as much to me that you would even think of helping than if you sent gold bars.
Keep watching . Brian.
 
D

Deleted member 17524

Guest - Please Register!
Guest - Please Register!
Brian; you'll like this.

Brian and I have discussed this before. It's time for the $64,000 dollar question.

Why do radial engines always have an odd number of cylinders in their rows, ie. 3, 5, 7, or 9 ???


"Billy G"
 

woodchucker

Bronze
Registered
Joined
Nov 25, 2015
Messages
1,504
I would guess its the timing of the cylinders. since it is radial the timing would be off if it were even numbered.
 
D

Deleted member 17524

Guest - Please Register!
Guest - Please Register!
That is a good guess and close but there is a specific reason for it.

"Billy G"
 

Cobra

Active User
H-M Supporter - Gold Member ($25)
Joined
Apr 24, 2013
Messages
691
Ensures that the firing is on every other cylinder. If there were an even number there would be break as it switched from even to odd number.
Two stroke radials can be even number of cylinders.
 
D

Deleted member 17524

Guest - Please Register!
Guest - Please Register!
Bingo, that break occurs once in every revolution of the engine. As said, it insures the consistent running.

"Billy G"
 

wileel

Active Member
Registered
Joined
Jul 12, 2017
Messages
60
No problem, I would love to help...maybe somehow we can pass a hat around.
Stinks, the logistics are making it hard to get materials, but I'll bet the view more than makes up for it. Looking at the shipping quote buying gold bars would be just as cheap (at least little ones).
 
D

Deleted member 120

Guest - Please Register!
Guest - Please Register!
Re the timing If you look at the drawing in post #274 and follow round with your finger going hit one miss one you will see the step over needed by the 4 stroke cycle.
It is possible to have radial engines with banks of even numbers of cylinders but you need 2 banks and fire alternate banks. think of 2 flat 4 motors sharing a common crank but 90 ° out.
Brian.
 
[5] [7]
Top