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04-28-2013 09:06 PM  7 years ago
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Mojave

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Palos Verdes, Ca. USA

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Spin blades
So, I got a 700mm 3 blade set of spin blades and put them on the mechs for my AS350 and flew them today. I have to say that I was very surprised by the amount of lift, given the narrow chord (40mm). These are RH asymmetrical with an almost flat bottom, the root is 12mm with a 4mm hole. I flew them at 1400rpm HS and could not believe the amount of pop that they have. "POP" is not a term I usually use with regard to scale machines on low head speed. The collective and cyclic response was awesome! I actually had to rethink my flying style with this blade They do balloon in wind, just like a clark S airfoil does. It will be interesting to see how they fly when I add the extra weight of the fuse. I'm sure the extra weight will tame them down a bit. I could probably get away with lowering the HS a bit more too. They tracked and balanced perfectly.
Barry

All helis and planes have an expiration date stamped on them...you only find it after you crash!!
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04-28-2013 09:11 PM  7 years ago
cueman100

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Santa Clarita Ca. USA

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Yep, they say they have lift at 0 degrees pitch.
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04-28-2013 09:57 PM  7 years ago
Mojave

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Good point! I got light on the skids at 1/3 collective vs 1/2 stick with the other blades. I was surprised that they had so much lift with such a narrow chord.
Barry
All helis and planes have an expiration date stamped on them...you only find it after you crash!!
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04-28-2013 10:08 PM  7 years ago
Dr.Tim

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Mojave Desert

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Barry, What mechanics are those? They look like Swift 550 ? I like them!From Simple minds come simple ideas! Approach Engineering
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04-28-2013 10:17 PM  7 years ago
Mojave

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Palos Verdes, Ca. USA

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Thanks Tim Those are Rex700e guts stuffed into CHP (custom heli parts) direct servo to swash frames. The frames are way shorter than the stock aligns. I'm using a rex600 tail box so that it will all fit neatly into the 700 size Marvelcraft AS350 fuse.
Barry
All helis and planes have an expiration date stamped on them...you only find it after you crash!!
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04-28-2013 11:58 PM  7 years ago
Rckfish

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Little Rock,AR

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Barry,
I am running a set of the Flat Black Spin Scale blades on a Rex 700 that I will be dropping into a A109. They are the 700s with a 64mm chord, asymmetrical.

It flies great at 1400HS on 12S. Interesting enough on the day of the first flights with the blades we had fairly windy conditions with rollers due to the field being surrounded by tall trees.

The 700 was actually more stable than my Benzine trainer that I was also flying. The difference was very pronounced.

I love the Spin blades and I wish the did LH rotation in the 800 size range. I would drop a set on my Vario Cobra in a heartbeat...love em...oh yeah, I already said that.

Paul
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04-29-2013 12:24 AM  7 years ago
Mojave

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Palos Verdes, Ca. USA

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Hi Paul, interesting info. When I bought these I spoke to the USA distributor and asked what the difference was between the flat black scale blades and the gloss white version. He said they were identical in every respect except the color. The gloss white blades were $30 cheaper, so I grabbed them. Come to find out after reading your post that the scale blades are a wider chord. I would have preferred the wider chord, had I known. I still like the way they fly, I just like the extra lift of the wide chord. That's my only gripe regarding spin blades, the website does not have adequate info on the blade specs. All of their info is very basic and vague.
Barry
All helis and planes have an expiration date stamped on them...you only find it after you crash!!
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04-30-2013 06:42 PM  7 years ago
TEZ09

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Suwanee, GA

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Hey Barry,

Spin has two seperate sets of matt black scale blades... I have the 700mm also, but mine are the matt black with the 40mm cord! I love them in that they will indeed cone a bit just like the full size heli's when under a load (2 blade set), and as you stated, they track perfectly... I have a 3 blade set I was hoping to put on my current scale build.I only have a few hours of flight time on them as I currently work out of town most days. So I will be paying close attention to see how this thread developes with others sharing their experience on these blades.
"Sling Blades Or Go Home"
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04-30-2013 07:12 PM  7 years ago
Mojave

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Palos Verdes, Ca. USA

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Interesting info. I guess they have a couple of variants on this blade. They do fly very nicely...
Barry
All helis and planes have an expiration date stamped on them...you only find it after you crash!!
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04-30-2013 08:23 PM  7 years ago
MattJen

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UK

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Hi Guys,

I am looking to try a set of these 1050 black ones, i am interested to see how well they compare to my current
MAH 950's which are fully symmetrical.
Looking at the videos and other comments on other forums they do seem to be an efficient blade with very good reviews.. the fact they claim you can get lift at 0 degrees gives me assurance of an efficient blade.
I notice the product code for the set I want is
12 400 2 1050 - is there any way of finding out what the chord and weight is, do they also give a max RPM ? As they are thin do they droop whilst in static?

thanks

Matt
All The Best
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04-30-2013 09:26 PM  7 years ago
bell222

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Australia

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This is good to hear,
i have been looking for scale blades.
i tried the ones from Smart Models and they are @#$%
they wont track whatever you do to them
Smart Models do not answer emails
this has been going on for about 3 months and no replies to many emails
wont buy from him ever again.
But looks like i will have to place an order with
Spinblades
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04-30-2013 09:37 PM  7 years ago
cueman100

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Santa Clarita Ca. USA

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I just got my set of scale 700 blades from spinblades. I haven't had a chance to try them out as yet. I did check the weight and balance of the blades, and all 4 blades were Identical in weight and balance. Their quality is excellent. They even made them special for me with a 5mm bolt hole, as they normally come with 4mm. The quality is so good, I even ordered another set from them before I even tried the one's I got yesterday. The only downside from ordering direct from Germany, is the shipping took 29 days . I ordered them on the first of April, they shipped on the 4th, and I got them on the 29th, but still very much worth the wait.
Jim
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04-30-2013 09:44 PM  7 years ago
Mojave

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Palos Verdes, Ca. USA

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Unfortunately, there is very little detailed info on the spin blades site. Your best bet is to call an authorized dealer and have them measure/weigh the blades that you are interested in. That's how I got my set... Hopefully, in the future they will have better stats listed on their website. Esprit Models in Florida sells these blades, maybe they could help you out.
Barry
All helis and planes have an expiration date stamped on them...you only find it after you crash!!
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04-30-2013 10:06 PM  7 years ago
MattJen

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UK

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Brilliant thanks all.
Thanks barry.
Looks like midland helicopters are listing them and i will give Modtron a pm
As he has his fingers in a lot pies..
I thought i may have missed sonething on web site.
Thanks again all the best with your current project..
Matt
All The Best
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04-30-2013 11:00 PM  7 years ago
G-Limo

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Europe

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For their 1050mm Black Scale blades they say the following...

These blades have been developed for the scale pilots. The dull black surface supports the scale look. Our logo, the three bars, was placed at the inside of the blade nearly invisible but noble, to support the scale look. These blades do have an asymmetrical airfoil and produce lift an angle of attack of 0 degree, enabling the pilot to decrease the flight rpm considerably, without losing any climb performances. The additional weight of the fuselage, lighting system and other mounting parts can be easily compensated for. These blades are available as two blades systems and in addition to as multiblades system with much smaller blade depth. The very low fl ow line combined with the more to the tip of the blade positioned center of gravity prove a very stable straight and level fl ight and optimized performance. These attributes are supporting the requirements of modern FBL Systems, for which these blades are optimized.

root:14mm - Bolt hole:6mm - weight/per blade:400g - width:100mm - max rpm.1400 - forward c/g: 1-3mm - air foil:Asymmetrical - direction of rot:Clockwise

/DG
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04-30-2013 11:15 PM  7 years ago
coptercptn

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Mesa AZ. USA

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Tell them you start making some LH rotation 810-950's!!!! (Scale of course!!) I think a lot of folks would buy them as the Vario's are about all that's out there....Home of the "Sea Cobra".....
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05-01-2013 04:03 AM  7 years ago
catbalu

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newzealand

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You can email Marc at spinblades ,he will give you the info you may need his email is. m.trautmann@spinblades.com

cheers
perfection comes at a cost..
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05-01-2013 04:37 AM  7 years ago
Mojave

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Palos Verdes, Ca. USA

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Thanks Gavin!All helis and planes have an expiration date stamped on them...you only find it after you crash!!
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