315mm Vs. 325mm Main Blades on a 450 - HeliFreak
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Old 09-10-2011, 05:12 PM   #1 (permalink)
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Default 315mm Vs. 325mm Main Blades on a 450

315mm vs. 325mm Fiber Glass main blades on 450 Heli

I used to have a Belt CP heli and have 3 pairs of blades for it, when I sold it I got to keep the spare 2 pairs which the new owner didn;t want to keep.

Lately I got an HK450 ver2 and out of curiousity used the 315mm main blades on it.

I was suprised to expereince a different handling characteristic and crisp response form the heli which I did not experience with the 325mm blades.Both 315mm and 325mm blades are made of fiber glass.

Using the 315mm blades it spooled faster, got crisp cyclic response and faster transition. I also felt that the heli moved faster from point A to point B and at a lesser cyclic input. I prefer to use this from now on

I am baffled by the result but was extremely happy about it. I've always thought that a shorter main blade will give it lesser responsiveness and performance.

Anyone can explain the physics of it, I am all eyes

Thanks guys!

Ed
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Old 09-16-2011, 01:53 PM   #2 (permalink)
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I have flown 315mm blades on my 450. These behaved like you said. IMHO you can use them without any problem.
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Old 09-25-2011, 12:28 PM   #3 (permalink)
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Mini Titans come with 315 mm blades. If that is of any help. No reason why they wouldn't worlk well
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Old 09-25-2011, 05:48 PM   #4 (permalink)
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Thanks guys!!
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Old 09-30-2011, 06:39 AM   #5 (permalink)
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315mm will give you more flight time, but you aren't going to be able to get more hang time in maneuvers. 315mm also don't auto as well. 325mm creates more lift making it easier for tic tocking, and auto'ing. Both blades has their pros and cons, and are use for different flying style. Only you can determine what you like.
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Old 09-30-2011, 02:52 PM   #6 (permalink)
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Thanks kouasupra:

I really wanted more flight time, I am no 3d flyer anyway.
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Old 12-15-2011, 10:10 PM   #7 (permalink)
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the 315 mm blades are shorter therefore the center of gravity is closer to the center of the head. This results in less torque and since the blades probably weigh slightly less than the 325 mm ones, there's less sprung weight.
All this means is that the motor can spin the blades faster and easier making your heli feel more agile.
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Old 12-24-2011, 11:21 AM   #8 (permalink)
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because of the slightly shorter blades your headspeed can be slightly higher which is a good thing and you wont loose power as much in high collective moves
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Old 12-24-2011, 08:50 PM   #9 (permalink)
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i went from 335 to 325 and noticed a mega difference on Walkera V450D01

may try 315
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