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HomeScaleAircraftHelicopterScale Model RC Helicopters › Blades for a 600 5-bladed head?
04-07-2015 02:17 PM  3 years agoPost 1
hrc37

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Derry, PA

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I have a 50 size 500E with a 5-bladed scale head and I've been experimenting with a few different size and types of blades and curious what other people are using. I've tried a few 600mm blades but I've been thinking about maybe going down to 550mm to try and get better flight times and generate less heat for the motor, battery, and speed controller. Also wondering if there is a big difference between using flybarless blades compare to flybar version? Thanks! Mark

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04-07-2015 03:27 PM  3 years agoPost 2
mcfast

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Quebec Quebec Canada

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I would try 550mm blades and if it still gets hot, you mite have to change the gearing. to slow down the head, as far as blades goes, I can not help you no that.

P.S. sorry for the spelling or the grammar I am dyslexic!

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04-07-2015 03:42 PM  3 years agoPost 3
hrc37

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Derry, PA

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Thanks mcfast,

I think I will give some 550mm a try. I figured 5x550's should give just as much, if not more, lift then 2x600's. It's just that feeling that if you have a 600 size fuse with 600 size mechanics, you need to use 600mm blades but I need to stop thinking this way when it comes to a multi-blade head. The other concern I have is that 550's would look to short and not scale like....but I don't think this will be the case.

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04-07-2015 04:27 PM  3 years agoPost 4
mcfast

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Quebec Quebec Canada

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When you look at real helicopters with multi-blade heads they are shorter, just look at a MD500 and a Jet-Ranger, the Jet-Ranger two blades are a lot longing then the MD 500.

P.S. sorry for the spelling or the grammar I am dyslexic!

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04-07-2015 04:38 PM  3 years agoPost 5
hrc37

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Derry, PA

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That's true but I do believe the Jet Ranger is a longer helicopter when compared to the a 500.

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04-07-2015 04:48 PM  3 years agoPost 6
Keygrigger

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Mississauga, Ont. Canada

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I have been flying a five blade head on my TOW Defender for three years now and have tried three different blade sets on it. The first were Rotor Tech 600mm semi-symmetrical blades which have a slight washout to them. The second set were 550mm Rotor Tech symmetrical blades and although they worked well, there was little difference in overall performance. I now run it with Spin Blades 600mm narrow cord semi-symmetrical blades and in overall performance, they have been the best so far. They are actually only a couple of millimeters longer than scale but the head will have more to do with the diameter than the blades when they are that long. 550mm blades are actually too short for scale but with wide cord 3D blades, your surface area is very similar. I am now looking into who can make a set of narrow cord symmetrical blades so that I can have better performance in hovering when in windy conditions. Semi-symmetrical blades can cause the helicopter to balloon which can really hurt in competition. Hope this helps.

Don

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04-07-2015 06:00 PM  3 years agoPost 7
mcfast

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Quebec Quebec Canada

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Those look petty nice, too bad they do not make them symmetrical.

https://www.scaleflying.com/Semi-Sy...f-5_p_1299.html

P.S. sorry for the spelling or the grammar I am dyslexic!

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04-07-2015 06:25 PM  3 years agoPost 8
hrc37

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Derry, PA

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Plastic blades
These are the first set I've tried. They are nice looking but they are very heavy (around 181g each) and they do flex...which can be a good thing or a bad thing depending on some variables. Since they are so heavy, they also draw a lot of current which makes everything run very hot. I've been thinking of maybe cutting them down to 550mm but I don't think this would do much for the weight.

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04-07-2015 09:04 PM  3 years agoPost 9
doorman

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Sherwood, Arkansas

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ESC Settings??
What is your throttle curve set at??
Maybe drop a tooth on the pinion to ease the load??
Give some info on your motor set up.. then you might be able to stay with the 600's..

Stan

AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft

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04-07-2015 09:16 PM  3 years agoPost 10
hrc37

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Derry, PA

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Hey Stan,

This is the machine I had at Dalton last year and just hovered a few times. I noticed at Dalton and more when I got home just how hot everything was getting and how short my flight times were. That along with the fact that these plastic blades are so heavy and do flex. I'm also running the smallest pinion I can. That's why I've started to experiment with a few other types. Mark

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04-07-2015 09:29 PM  3 years agoPost 11
Keygrigger

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Mississauga, Ont. Canada

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Stan is spot on. In order to help, a lot more information is needed to suggest a better setup for you. Lighter blades will reduce the load on the system, but a more complete rundown of your setup will make it easier for us to suggest a better combination. A listing of the motor, pinion, main gear, esc, batteries, and weight will help us to help you. Take care.

Don

PS: Hovering a machine, that is not running an optimal setup, will create a lot of heat as there is no motion to help vent the hot air away from the ESC and motor.

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04-07-2015 09:46 PM  3 years agoPost 12
doorman

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Sherwood, Arkansas

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^^^^^ YEP
What Don said!!!!

AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft

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04-07-2015 10:40 PM  3 years agoPost 13
flyawayed

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orlando , fl .USA

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Before u cut those blade dont I had a set of them for a 500D hughs I built and did the same thing and cut them to 550mm and wow the weight change big time.2 were then now 168g. 1 weight was 154g. And last two 171. I found out that tje last 80mm of the blades is where the bulk of thw weight is! I ended up using the rototech scale thin core blades they are semi. But fly nice. I have them on 4 out of 6 of my scale birds.also what mechanics are u running, what system if batteries,6s,8s,10'or12. And whats ur head speed and gearing. I know with my 500D with scale 5 bladed head with 600mm thin core blades my flight time is 8:30/9mins on 12s and my batteries are bearing warm. Also what ESC are u using? All my birds I only use Castle ESC when im building a setup im looking at the head speed I want to achieve and how im going to build the gearing. Always my goal is to get as long of a flight time with little to no heaton the batteries,ESC, and motor.

RC Flt#2 T-Rex 700 Hughes 500D Helicopter - NYPD Color Scheme:

Watch at YouTube

edward lopez sanchez

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04-07-2015 11:02 PM  3 years agoPost 14
hrc37

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Derry, PA

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Thanks guys and your both correct but we kind of got off subject here. As I stated in my original post was that I've been experimenting with some different kinds and types of blades and was curious as to what other people are flying for a 600 5-bladed head. As I also stated,the first blades I tried were the plastic/ccomposite ones from RCA and I wasn't impressed with the way they preformed and they caused everything to run very hot. So my next set was a set of woodies....yes...that's right....woodies that I modified and they flew better, gave me more flight time, and everything ran cooler. But this ismy first 5 blade multi head and I am wondering that I may to be able to improve things with different blades so that's why I asked what other people are flying. I also have a Vertol (has 2 3-bladed heads) that I too have tried a number of different blades over the years to try and find the best combination for the machine and my flying style...which in most cases, that's what it all comes down to.

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04-07-2015 11:16 PM  3 years agoPost 15
hrc37

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Derry, PA

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Thanks for that info flyaway. I've been tempted to cut them down to 550 but figured that 50mm isn't going to save that much weight which according to your numbers, it didn't.

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04-08-2015 02:51 AM  3 years agoPost 16
doorman

rrProfessor

Sherwood, Arkansas

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Blades...
http://spinblades.com/en/products/s...lade-435-detail

Take a peak at these... 85g per blade..runvthe 600's!!!

Stan

AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft

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04-08-2015 03:32 AM  3 years agoPost 17
Keygrigger

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Mississauga, Ont. Canada

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I spent a bit of time on the phone with someone that has been flying helicopters for nearly 25 to 30 years. His comments were that I should go with the symmetrical blades for windy conditions and test them in no wind high heat conditions against what I have now. He is sure that I will stay with the symmetrical blades for everything. I am now searching for blades that are symmetrical and the way I am now leaning for windy conditions is 600mm Rotor Tech silver grey blades H-6026. I am using the same blade on my CH-139 in 550 size and they perform great. These blades will be used for flying in windy conditions mostly but if testing shows that they perform better than the Spin Blades in light to no wind, I will drop the Spin Blades and reverse the direction of my TOW Defender main blade.

I just returned from the Cajun Heli Fest and was observed and scored in flight by Len Mount, arguably one of the best scale builders in the world and as good a pilot as they come. His comments on my helicopter in flight were that it was the most stable 5 blade helicopter he had ever seen fly but its performance in hovering in windy conditions was what dropped it by a few points. The gusts create extra lift in the gust with a semi-symmetrical blade that does not happen with a symmetrical blade. I might either return the set of new Rotor Tech semi-symmetrical blades I have or sell them at one of the meets I will be attending. That is how much I am convinced that symmetrical blades are what needed in the wind. In the meantime, the Spin Blades will stay put. I hope this is of use.

Don

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04-08-2015 03:50 AM  3 years agoPost 18
hrc37

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Derry, PA

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Wind
Hey Don, wind is what separates the boys from the men...lol

Mark

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04-08-2015 01:00 PM  3 years agoPost 19
doorman

rrProfessor

Sherwood, Arkansas

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Wind Is Your Friend!!!
All of my scale birds use asymmetrical blades.. I like big blades and lower head speeds...
To make them more manageable in the wind, I dampen the pitch curve around center, which helps to smooth things out..
I have flown in winds up to around 25mph just to to practice.. it is an excellent teacher for collective management!!
Your flying preferences do help with your choice..
25 years at helis and still learning!!

AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft

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04-08-2015 01:08 PM  3 years agoPost 20
hrc37

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Derry, PA

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Stan is the only one that ever looped a Jet Ranger at the Scale Nats!!!!....lol.....well not really but he did come close one year....when the wind was pretty bad!!!! Mark

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