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HomeAircraftHelicopterBlades and Night Flying › Wide / Narrow Chord ?
06-05-2009 03:03 AM  9 years agoPost 1
Helizrule

rrVeteran

Lake Ariel, PA

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I have been using Radix wide cord blades and some Marrikk brand. I am looking for some Mavrikk G5 blades but what is the flight difference between Wide cord and narrow cord blades? Is one better for 3D or Autos and do the wide cord bog the engine more?

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06-05-2009 03:07 AM  9 years agoPost 2
Dood

rrProfessor

Wescanson

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do the wide cord bog the engine more?
From my own experience I feel that they do.

wide chords don't fit me well as I tend to over use the collective.
The only logical explanation I can think of is the wide chord creates more drag.

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06-05-2009 06:51 PM  9 years agoPost 3
no1pylon

rrApprentice

Chorley, UK

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I think Dood is right a wider chord would be in effect a lower aspect ratio wing so would cause more drag. If the same physics apply that is for aircraft wings.

Shane

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06-05-2009 07:09 PM  9 years agoPost 4
Darren Lee

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Woodstock, GA

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Typically you should use less pitch to compensate for the wider chord and to prevent bogging. I like the Mavrikk G5s.

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06-05-2009 07:18 PM  9 years agoPost 5
HeliFisher

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Verdi , Nevadafornia

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Doesn't a wide cord blade give you lighter disk loading. It would seem to me that if your power is sufficient, you would have more pop.

I just got a set of Mavrikk G5 WC 325s, but I'm still down with a tail servo issue, so I haven't flown them yet. I'm coming off a crash with some Radix 325s that I was very impressed with. I would not hesitate to get those blades again, but I got the Mavrikks to see the difference. Hopefully I'll be back in the air this week and can test them out.

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06-05-2009 07:22 PM  9 years agoPost 6
Darren Lee

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Woodstock, GA

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It would seem to me that if your power is sufficient, you would have more pop.
Absolutely true.

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06-06-2009 05:04 AM  9 years agoPost 7
chopper_crazy

rrElite Veteran

Delphos, Ohio

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From my personal experience, I prefer the narrow or standard chord. The wide chord blades definately bog the engine more especially if you not super smooth and they don't auto nearly as well.

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06-29-2009 05:22 PM  9 years agoPost 8
CoronaL

rrKey Veteran

Winnebago IL

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on my TREX700's the Radix 710SB compared to the Mav G5Pro's 710mm, the Mav's have ALOT more pop and fly great. That machine just feels lighter and snappier in the air. I love those blades.

Not that the 710SB's are bad. They are great blades too, but unless you get the cos flaws which are a screaming deal, I wouldn't personally pay retail for 710SB's. They are softer ie not as stiff and while they are a good quality and do just about everything well, I don't think they pop as well and bite as hard on fast transitions.

I can't tell the Mav's being worse than Radix for Autos, but I'm not an auto king and mine are very basic. I could see though the Radix having a better auto tendency just due to the taper of the blades at the tip being more square on the Radix versus curved on the Mavs.

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06-30-2009 01:12 AM  9 years agoPost 9
BJames111

rrElite Veteran

San Diego, California

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Guys, there's more to it than wide or narrow chord. Blade weight, airfoil, and ridgidity are all factors. PLUS the setup of the model is also critical. If we take a step back in history when V's were actually available, they were difficult to manage collective on because of two reasons: narrow chord, and extremely ridged. Anyone who did more than hovered who flew v's and then radix back to back could tell right away.

I think a wider chord actually creates LESS drag, as the blade enters a large pitch angle, the airfoil stalls sooner on a narrow blade than it does on a wide blade. I'm certainly no airfoil engineer, but It seems to make sense. Again, the aifoil plays a huge role.

our of curiosity, those that don't prefer a wide blade, what blades do you like?

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06-30-2009 09:50 PM  9 years agoPost 10
LoveMyTrex

rrVeteran

Hamilton,VA

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on my 600 have tried the align 600D's (narrow cord same as V's) radix 600's (wide cord) radix 600 SB's (wide cord stiffer and lighter) and 600 TST V's. worth noting is the aligns and the V's have identical size and shape, and near identical airfoils. the aligns are lighter than the V's and have the CG closer to the root, and the V's are MUCH stiffer.

I like the aligns because they are almost impossible to bog and they are really light and quick on cyclic, and auto reasonably well.

I didn't like the radix because they were much slower on cyclic and loaded the head a lot more for barely more pop, also they did not seem to auto any better.

the radix SB's were OK. popped better than the aligns, rolled the same, loaded the head more, but thats to be expected with more pop, autoed like CRAP

the V's load the head more than the aligns pop better, roll near the same and auto well. I don't really like the TST's as they loaded the head without popping a whole bunch better.

on my 700 I have flown the align 690D's (narrow cord identical to V's) and 690 slick V2 V's. the V's have the same size and shape as the aligns and almost the same airfoils. the aligns are lighter (175g) and the CG is closer to the root. the V's weight 182g

I liked the way the aligns flew, impossible to bog, popped well, rolled quick, and autoed reasonably well.

I love the V's. they pop crazy good, load the head more do to the extra pop, roll slower but still a good speed, and they auto a little better than the aligns.

I have never really liked the widecord blades, they seem to bog more and not auto as well per weight. I also like a very rigid blade.

all just MHO

600N 55HZ/SAB-55 600V's
700N 91HZ/SB-20 690V2 V's
90SG 91HZ/SB-20 710V2 V's

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07-05-2009 11:39 PM  9 years agoPost 11
Justin Stuart (RIP)

rrMaster

Plano, Texas

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I think the Mavrikk G5s are extremely rigid.

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07-06-2009 04:17 AM  9 years agoPost 12
MR SLOWFLOW

rrVeteran

N.J/N.Y

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v blades/radix
ive been using these blades, and for me, slow precise acro/3d moves id dont worry about loading up blades. i also run radix blades(std) best all around blades , tt blades are my set up blades i really like them too. at one time nhp blades were the blades too have, most people stick with the blades they feel fit their stlye.

aka MR AIRBRUSH

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