This
project will involve mechanical, electrical and electronic engineering.
The
dynamometer will enable us to compare the power output of different
engines, or different settings and tuning arrangements of a particular
engine.
The
principal of calculating the power output is very simple. We will
load the engine using it as a generator producing DC current to
light up a flood lamp. By measuring voltage and current we can
calculate the power output which we can use for comparison purposes.
If we then measure the efficiency of the dynamo we can calculate
the true power of the engine.
Hardware construction Details
Cutting
List
Part
Material
Size: L W H
Details
Frame
12 x 12 ERW tube
340 x 95
Tubular frame brazed or welded
with M6 nuts or inserts in the corners for anti vibration
mounts.
Engine mount:
Uprights
Belt tensioner
Clamps
BDMS
BDMS
Angle section
95 x 40 x 3
60 x 40 x 3
35 x 20 x 8
Slotted for M6 tensioning bolts.
Cut and bent at right angles
35 mm from end
Equal angle cut down to produce
clamp. Drilled 6.5mm for clamping bolt.
Rubber mounts
Vulcanised rubber
M6 threaded
Counterbore base for nut location
Base 1
MDF
360 x 100
Non-critical in material and
exact dimensions
Base 2
MDF
360 x 200
As above
Shield
Sheet steel
360 x 240 x 1
Sheet anything, polycarbonate
could be good
Mat
Polyethylene
360 x 200
Supplied to minimise instrument
vibration
Misc
Clamping bolts all M6
Dynamo mounting made to suit.
Sample one was done with two cross-rails brazed between side
frames.
