cox24711
Well-Known Member
- Joined
- Sep 6, 2016
- Messages
- 79
- Reaction score
- 25
Hi all!
long time no see (thank you very much school
)
recently I have been measuring number crunching and drawing up plans for my latest project (as the title suggests) A Diesel head for a Webra Speed 61 RC because why not?
the Webra speed 61 is the perfect example of an engine to do this to. It has a SUPER BEEFY crankshaft and rod, a ringed piston with a steel liner and mine has excellent compression (and the box and instructions too!)
I wanted a slightly better squish band (more turbulence and mixing the better especially at tdc) so I slightly decreased the clearance between the piston and the head so it is now .030" instead of .047. Still plenty room. the variability of the compression is from 10:1 to beyond 24:1! so yes I will be experimenting with fuels mostly etherless fuel that will contain 3/4 paraffin (kerosene) and caster oil
I wont go through anything more because I am probably boring you to death, I wonder how may inserts that will take?
Here is the link to download the plans. sadly I don't have a cad program ( they are so expensive) so I drew it up on some grid paper :thumbup: http://www.homemodelenginemachinist.com/downloads/diesel-head-for-a-webra-speed-61-rc-332.html
I am soo ready to make some chips and today is friday! so the weekend is close!
long time no see (thank you very much school
)recently I have been measuring number crunching and drawing up plans for my latest project (as the title suggests) A Diesel head for a Webra Speed 61 RC because why not?
the Webra speed 61 is the perfect example of an engine to do this to. It has a SUPER BEEFY crankshaft and rod, a ringed piston with a steel liner and mine has excellent compression (and the box and instructions too!)
I wanted a slightly better squish band (more turbulence and mixing the better especially at tdc) so I slightly decreased the clearance between the piston and the head so it is now .030" instead of .047. Still plenty room. the variability of the compression is from 10:1 to beyond 24:1! so yes I will be experimenting with fuels mostly etherless fuel that will contain 3/4 paraffin (kerosene) and caster oil
I wont go through anything more because I am probably boring you to death, I wonder how may inserts that will take?
Here is the link to download the plans. sadly I don't have a cad program ( they are so expensive) so I drew it up on some grid paper :thumbup: http://www.homemodelenginemachinist.com/downloads/diesel-head-for-a-webra-speed-61-rc-332.html
I am soo ready to make some chips and today is friday! so the weekend is close!
