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There is now a reasonable selection of blades for the T-Rex although the
majority all being supplied by Align themselves. All the current blades
available for the T-Rex are summarised below : |
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| Blade Type |
Length |
Manufacturer |
Review Date |
| Wood |
315mm |
Align |
January 2005 |
| Solid Wood |
315mm |
Align |
TBA |
| Wood |
335mm |
Align |
April 2005 |
| Carbon Fiber |
325mm |
Align |
11/02/2005 |
| Carbon Fiber |
280mm |
MS Composit |
19/02/2005 |
| Carbon Fiber |
320mm |
SAB |
23/03/2005 |
| Wood (325 pro) |
325mm |
Align |
12/12/2005 |
| Carbon (315 3K) |
315mm |
Align |
04/01/2006 |
| Carbon |
320mm |
e-copter (BlueBird) |
02/01/2006 |
| Carbon |
310mm |
e-copter (BlueBird) |
tba |
| Carbon |
325mm |
Hyperion |
12/01/2006 |
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As a way of comparing the blades outside of actual flight performance I
decided to place the blades on my T-Rex a pair at a time and using governor
mode on my Phoenix 35 I tested the amp draw at full pitch for each blade.
I also made note of the drop in RPM as another indicator of loading on
the motor from the blades.
The following table shows the results and beneath it I have the graph from the power analyser showing the peaks as the blades were taken up to full throttle, full pitch. This table isn't meant to show the maximum amp draw you will get with any particular blade, the important information is in the delta in motor loading, showing the relative performance impact of running each blade on your battery and motor. The motor used in the test is a Mega 16/15/3 running on a 3S Tanic 2220 Lipo. |
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| Blade |
Governed RPM |
RPM at Full Load |
Max Amps |
Delta % |
| Align Wood 315 |
2450 |
2130 |
15.05 |
0 |
| Align Wood 335 |
2450 |
2000 |
18.5 |
19% |
| Align Carbon 325 |
2450 |
1980 |
21 |
28% |
| MS Composit 280 |
2450 |
2100 |
15.85 |
0.05% |
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Key to the graph :
| Light Blue |
Align Wood 315mm |
| Dark Blue |
Align Wood 335mm |
| Red |
Align Carbon Fiber 325mm |
| Green |
MS Composit 280mm |
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As can be seen from this the Align Carbon Fiber 325mm blades have the largest
penalty in terms of amp draw and RPM loading compared to the stock wooden
315mm blades. Clearly running these blades will have the biggest impact
on flight times due to the increased amp draw. Of course this test gives
no indication of the relative flight performance you are getting for that
increased loading. I will cover this in the individual blade reviews. |
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