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HomeAircraftHelicopterThunder TigerOther › Tail Blade Lengths - Raptor 50 & Caliber 30
02-07-2006 05:33 PM  12 years agoPost 1
Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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This post involves tail blade lengths for a Caliber 30 and for a Raptor 50.

The tail blades that came on my Caliber 30 were 80mm. When flying last weekend, my girlfriend had a rough landing and we removed her tail blades and replaced them with the stock ones from my brand new Raptor 50. After I got home I noticed that the stock Raptor 50 blades were 85mm. I’m currently flying my Raptor 50 with 90mm CF blades.

I bought a used Raptor 50 from a friend. That helicopter has many nice upgrades on it. I measured the tail blades on it – 80mm??

So, what is the correct tail blade length for these 2 helicopters? I assumed that you would only improve the tail performance with longer blades. Could you actually decrease the performance with longer blades? As long as there were no interference issues with the main blades, wouldn’t it only improve the performance by going to the longer blade?

Thanks for your help.
Rockohaulic

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02-07-2006 06:44 PM  12 years agoPost 2
BarracudaHockey

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Jacksonville FL

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Its not only length its girth.

Well in our case chord width. Some people run the 80 mm maverikks on the 50 but they perform better than the stock blades because they have a wider chord.

Andy
AMA 77227
http://www.jaxrc.com

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02-07-2006 06:54 PM  12 years agoPost 3
Rockohaulic

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Those 80mm Maverikks - are they CF?

Since the stock blades are 85mm, why not run 85mm Maverikks (or do they not exist?)?

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02-07-2006 07:13 PM  12 years agoPost 4
BarracudaHockey

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Jacksonville FL

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80 95 and 102 are the only CF tail blades that Maverikk makes. Some say the 95 are a mm or two too long for the Raptor.

Andy
AMA 77227
http://www.jaxrc.com

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02-07-2006 07:45 PM  12 years agoPost 5
spaceman spiff

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Tucson

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I've been using the cheap raptor 60 tail blades trimmed down to 90 or 91 mm. Cheap, tough, effective. Never had a tail blow out on any of my 50's.

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02-07-2006 07:58 PM  12 years agoPost 6
Rafael23cc

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Junction City, KS

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YES.

I could not find 85mm blades, but here you go....

http://www4.mailordercentral.com/he...cts.asp?dept=18

the efficiency of the blade increases as the diameter (length) increases. When you cannot increase the length (for whatever reason) you can increase the chord of the blade and the efficiency will still increase. This is the simplified version because I do not know the scientific version. Everything to a point, before you start to loose efficiency....

Rafael

Keep your feet on the ground, but your eyes on the sky.
Team Heliproz.com

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02-07-2006 09:15 PM  12 years agoPost 7
Rockohaulic

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barracudahockey,

This guy was actually running 80mm, white plastic blades on the Raptor 50.

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02-07-2006 09:33 PM  12 years agoPost 8
BarracudaHockey

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Jacksonville FL

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Maybe he was afraid of a blade strike!

Andy
AMA 77227
http://www.jaxrc.com

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02-07-2006 09:39 PM  12 years agoPost 9
DOperchal

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Ft Rucker, AL

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Wait, hold on a sec...

Your girlfriend flies? That has got to be the coolest thing ever. Better snag her soon before some of the other guys on RR get to her first

Peace through superior firepower

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02-07-2006 09:55 PM  12 years agoPost 10
dasd

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Carol Stream, IL

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FWIW, I used these for 2 years on my Raptor 50. Great results.

http://www.ronlund.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=heli&Product_Code=MAH5-90

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02-07-2006 11:03 PM  12 years agoPost 11
A. Bundy

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Aurora,IL. 30W/SW of Chicago

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I've been using the cheap raptor 60 tail blades trimmed down to 90 or 91 mm. Cheap, tough, effective. Never had a tail blow out on any of my 50's.
Works good here,too.The 85mm NHPs are a good blade as well.They are really fat chorded.I would say they are about equal in performance.$7 vs. $25.

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02-07-2006 11:55 PM  12 years agoPost 12
Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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Raptor 60 Blades:

What's the best way to cut them cleanly ??

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02-07-2006 11:58 PM  12 years agoPost 13
Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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The NHPs are $7 ?? Where do I get them?

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02-08-2006 12:04 AM  12 years agoPost 14
A. Bundy

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Aurora,IL. 30W/SW of Chicago

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Bolt them even together and hit them on a grinder or sander.Of course then balance them.....NHP 85s are the carbons.$7 for the R60 plastic blades.I do backwards inverted loops with them.601 gyro.

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02-08-2006 01:37 AM  12 years agoPost 15
Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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Chord Lesson:

OK guys, I guess I don't see the logic of increased efficiency with increasing chord.

The chord is the thickness, correct? If you keep increasing the chord, it will eventually be a round dowel

Does the efficiency increase because of some aerodynamic property, or simply because the blade is stiffer and therefore does not flex as much at higher angle of attacks?

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02-08-2006 01:55 AM  12 years agoPost 16
DOperchal

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Ft Rucker, AL

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No chord is the width of the blade itself not the thickness (direction perpendicular to the length of the blade)

Peace through superior firepower

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02-08-2006 02:12 AM  12 years agoPost 17
Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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Oh. Got it!

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02-09-2006 01:14 AM  12 years agoPost 18
Yug

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UK. Herts

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For the past year, have been running 90mm SABs but recently switched to 95mm NHPs cut down to 92. Tremendous performance.

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