Flared port testing part 3 - Raw Data
Port measurements
|
Port
diameter
|
Inside
Flare radius
(mm) |
Physical
length
(mm) |
|
Five 86 mm diameter ports Outside flare radius 63mm |
unflared
|
332
|
|
10
|
337
|
|
|
25
|
344
|
|
|
35
|
349
|
|
|
50
|
357
|
Table 1 - List of port sizes. Differing physical lengths all give 300mm effective length after flares taken into account
Results
Tested using 50 litre twin driver box 240w. Calculated Power = ( Voltage squared ) / 7
|
Inside
Port
( mm) |
Voltage
|
Power
(Watts) |
Velocity
(m/sec) |
|
86 unflared |
6 @15hz 4 @ 20hz 2.4 @25hz 4.6 @ 30hz 5.6 @ 35hz |
5.1 @15hz 2.3 @ 20hz 0.8 @25hz 3.0 @ 30hz 4.5 @ 35hz |
4.1 @15hz 3.7 @ 20hz 2.2 @25hz 3.6 @ 30hz 3.6 @ 35hz |
|
86 / 10 |
7 @15hz 5 @ 20hz 5 @25hz 8 @ 30hz 12 @ 35hz |
7.0 @15hz 3.6 @ 20hz 3.6 @25hz 9.1 @ 30hz 20.6 @ 35hz |
4.8 @15hz 4.6 @ 20hz 4.6 @25hz 6.2 @ 30hz 7.7 @ 35hz |
|
86 / 25 |
14 @15hz 10 @ 20hz 11 @25hz 17 @ 30hz 27 @ 35hz |
28 @15hz 14.3 @ 20hz 17.3 @25hz 41.3 @ 30hz 104 @ 35hz |
9.6 @15hz 9.2 @ 20hz 10.1 @25hz 13.2 @ 30hz 17.1 @ 35hz |
|
86 / 35 |
15 @15hz 11 @ 20hz 12 @25hz 20 @ 30hz 31 @ 35hz |
32.1 @15hz 17.3 @ 20hz 20.6 @25hz 57.1 @ 30hz 137 @ 35hz |
10.2 @15hz 10.1 @ 20hz 11.0 @25hz 15.6 @ 30hz 19.7 @ 35hz |
|
86 / 50 |
17 @15hz 14 @ 20hz 14 @25hz 25 @ 30hz plim @ 35hz |
41.3 @15hz 28 @ 20hz 28 @25hz 89.3 @ 30hz - @ 35hz |
11.6 @15hz 12.8 @ 20hz 12.8 @25hz 19.4 @ 30hz - @ 35hz |
Last update to this page 2nd March 2007
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