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Old Aug 04, 2010, 10:02 PM
2012 Camaro ZL-1 Heli Hauler
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Golden Gulf Coast
Joined Jul 2002
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New Product
600/700mm scale rotor blades from SmartModel

A USPS Express mail package arrived today. Opened the box and found four 700mm swept tip scale main rotor blades and also a set four 600mm swept tip blades. These are test articles sent direct from the SmartModel factory in China. The 700's will be put to work on my SmartModel USCG HH-60J Jayhawk and the 600's on my 600 size AH-64A IAF Apache.

The blades appear to be injection moulded resin with a high carbon content and are very tough.
Step one was to get out the Ohaus triple beam scale out and weigh all 8 blades with the following results:

Blade 1 (700mm) = 207.4g
Blade 2 (700mm) = 207.5g
Blade 3 (700mm) = 207.5g
Blade 4 (700mm) = 207.6g

Blade 1 (600mm) = 225.2g
Blade 2 (600mm) = 225.5g
Blade 3 (600mm) = 225.6g
Blade 4 (600mm) = 225.6g

The weight variances are minimal and some of the best I have seen. I will wait until the blades are painted before using clear coat to balance them. Once installed and rotor head with blades is balanced, the blades will be numbered as will the grip in which they are mounted.

The 700mm blades measured 47mm at the chord, 6.6mm at the thickest part of the symmetrical airfoil and 14mm thick at the root with 4mm I.D. mounting bolt hole.

The 600mm blades measured 47mm at the chord 6.6mm at the thickest part of the symmetrical airfoil and 12mm thick at the root with 4.8mm I.D. mounting bolt hole.

The symmetrical airfoil allows installation that supports both CW and CCW main rotor rotation so that the modeler can accurately mimic the 1:1 heli that's being modeled. In my case both the Jayhawk and .Apache have CCW rotation.

If the heat wave ever breaks here along the coast (108-110 deg F heat index), we'll get these strapped on the two chassis that have had power trains upgraded for 10s and 12s Lipos with low kV motors for these two very sweet scale fuselages from TFModel/SmartModel. Now all we need is the four blade cascade T/R for the Apache and all will be right in my hangar. We'll be back with flight reports including a complete description of the mechanical and electrical/electronics set ups for both chassis. Both are based on the Align TRex 600e kits.

Thanks to Kin and Willis for these test samples. They are beautiful and will really make the Hawk and the Apache "POP".

Cheers - Boyd
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Last edited by Hoverup; Aug 05, 2010 at 10:13 AM.
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Old Aug 05, 2010, 05:36 AM
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Hoverup, i look forward to your tests of these blades, good luck and i hope they work out for the 700 series heli's.

cherries
zim

you may have the weights of blades, around the wrong way
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Old Aug 05, 2010, 08:36 AM
2012 Camaro ZL-1 Heli Hauler
Hoverup's Avatar
Golden Gulf Coast
Joined Jul 2002
10,199 Posts
Quote:
Originally Posted by Zimmerman View Post
Hoverup, i look forward to your tests of these blades, good luck and i hope they work out for the 700 series heli's.

cherries
zim

you may have the weights of blades, around the wrong way
Good catch zim Post edited.

Cheers - Boyd
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Old Aug 05, 2010, 10:33 AM
2012 Camaro ZL-1 Heli Hauler
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Golden Gulf Coast
Joined Jul 2002
10,199 Posts
Rounded tip blades are also available for EuroCopter applications and many others. I believe these will be available in both 600 and 700mm spans.

Cheers - Boyd
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Old Aug 05, 2010, 10:35 AM
MB-Commander
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WOW, 200 grams of weight, per blade? I think that for as much as I like these I am going to pass on them.

G.
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Old Aug 05, 2010, 10:42 AM
Redjestird Youser
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Hey, whats wrong with that? You can fly...and trim the hedges at the same time
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Old Aug 05, 2010, 10:43 AM
2012 Camaro ZL-1 Heli Hauler
Hoverup's Avatar
Golden Gulf Coast
Joined Jul 2002
10,199 Posts
Quote:
Originally Posted by SidewaysLS4 View Post
Hey, whats wrong with that? You can fly...and trim the hedges at the same time
They are stout.
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Old Aug 05, 2010, 10:59 AM
Track clear , smoke on !
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I would like to see a flight test video, any chance?
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Old Aug 05, 2010, 11:07 AM
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Quote:
Originally Posted by cap231ex View Post
I would like to see a flight test video, any chance?
2-blade test vid ...
TF BLADES TEST 1.MP4 (1 min 7 sec)




TF Blade 3-D test 2.MP4 (4 min 3 sec)
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Old Aug 05, 2010, 12:54 PM
MB-Commander
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Quote:
Originally Posted by SidewaysLS4 View Post
Hey, whats wrong with that? You can fly...and trim the hedges at the same time
Exactly, LOL! what was I thinking!

G.
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Old Aug 05, 2010, 01:31 PM
Track clear , smoke on !
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That's nice Sidney but I would like to see something with a fuselage and scale head(3-5 blades) just seems like a lot of rotating mass. Regular FG 600mm blades are around 138-145grs. times 4 = 552-580grs. 207 X 4 = 828grs a whopping 278-248grs that's a lot of extra weight spinning around a 10mm shaft.
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Old Aug 05, 2010, 01:53 PM
2012 Camaro ZL-1 Heli Hauler
Hoverup's Avatar
Golden Gulf Coast
Joined Jul 2002
10,199 Posts
Quote:
Originally Posted by cap231ex View Post
That's nice Sidney but I would like to see something with a fuselage and scale head(3-5 blades) just seems like a lot of rotating mass. Regular FG 600mm blades are around 138-145grs. times 4 = 552-580grs. 207 X 4 = 828grs a whopping 278-248grs that's a lot of extra weight spinning around a 10mm shaft.
Points well taken. The swept tip blades will only show up in four blade setups as that's the way the 1:1 helis with these blades are configured. Hawks and Apaches are the swept tip helis that I'm aware of. We'll see how they fly at a relatively low headspeed. Be back in a few days with initial impressions test flying the mechanics. Meeting your request will take a little longer as the work involved in mounting the machinery in the fuselage is a little more involved than an ARF.

Cheers - Boyd
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Old Aug 05, 2010, 01:55 PM
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I've seen 600 and 700mm blades weighing >200g each. I guess most will run 8, 10 or 12S, the fuselage is heavy too in this class. Agree on the weight when you have 4 or 5 of them.

http://www.helidirect.com/curtis-you...des-p-6413.hdx
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Old Aug 05, 2010, 02:05 PM
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mine are 98 grams a piece, I won't settle for double the weight at the rotorhead. Thats another 500 grams of crap to move around. Not rotate around, that shouldn't matter a bit, well, be prepared to see blades grips shooting out of the threads eventually... but other than that they look cool.

G.
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Old Aug 05, 2010, 02:10 PM
MB-Commander
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Quote:
Originally Posted by Hoverup View Post
Points well taken. The swept tip blades will only show up in four blade setups as that's the way the 1:1 helis with these blades are configured. Hawks and Apaches are the swept tip helis that I'm aware of. We'll see how they fly at a relatively low headspeed. Be back in a few days with initial impressions test flying the mechanics. Meeting your request will take a little longer as the work involved in mounting the machinery in the fuselage is a little more involved than an ARF.

Cheers - Boyd
Yeah, I would advise to fly these at real scale headspeeds, like 900 RPM, I wouldn't feel safe spinning those 220 gram blades at 1600 RPM, especially when I know for a fact that those blades won't snap, break nor shatter, instead, those 5 machetes spinning at 1600 RPM are ready to chunk anything or anybody at a moment's notice.



G.
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