[Land-speed] Sunbeam 260 and DIY Dyno first trial run...

[John Staiger]

Very cool... great job Mayf.  The engine sounds good and the dyno is very
interesting.  Are you planning to control the load by hand for sweeps? Or
automate it to hold an RPM/Load for tuning? If so, what are you planning to
use to control the hydraulic brakes?

JLS

-----Original Message-----
From: land-speed-bounces at autox.team.net
[mailto:land-speed-bounces at autox.team.net] On Behalf Of Larry Mayfield
Sent: Tuesday, May 21, 2013 5:46 PM
To: land-speed at autox.team.net; tigers at autox.team.net
Subject: [Land-speed] Sunbeam 260 and DIY Dyno first trial run...

Ok, so you all looked at the vids of the first two startups of the Sunbeam's
newest motor. Well, now here is a third one, made yesterday, that has the
run stand coupled to its diy dyno counterpart. This was the first time ever
fired up on the dyno and there were lots of questions in my mind. It worked
out just fine! The dyno is something I fabricated from scratch using a
Jaguar IRS with inboard disk brakes.  I even shortened the drive shaft
myself. The blue components are water collectors and shields to keep water
from going all over the place. Two spray nozzles along side each rotor.
Lots of things I might do differently, lots of things to change or improve,
but it works!  When operating at 2500 rpm, I am able to drop the rpm with
just a small change in pressure to the brake master cylinder's push
cylinder.  And recover the rpm afterwards.  I did not try and  break
anything because the tune is not right. Ok for the load level we were at but
not a full boogie run.  Plus, if I ran it at full song, I suspect the police
would have been there in short order, lol. It barks really loudly, so some
turbo mufflers are required...

here is the link..


http://www.youtube.com/watch?v=YEGXda1cZ8Q

mayf

--
______________________________
drmayf
Worlds Fastest Sunbeam, period.
204.913 mph flying mile
210.779 mph exit speed
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