rrTV-PHOTO   New HD TV
HOME   rrTV-PHOTO   GALLERIES   MY GALLERY   HELP-FAQ
myHOME PM pmRR MEMBERS 803 ONLINE 19 EVENTS SEARCH REGISTER  START HERE
 
1 page1332 viewsPOST REPLY
CarbonXtreme . Midland Helicopters . HeliProz

.
.
Scale Model RC Helicopters > What is a "NOTAR?"
 
 
BigProp
Heliman
Location: Bay Area, CA

HI all you scale guys and gals. I started flying helis recently and really like certain helis. I own a Fury, but I REALLY like the look of the 520 on East Coast Helicopter's website. My question is about what's being referred to as NOTAR. (please forgive my ignorance) I assume that it's the name given to a "tail rotorless" heli. Is that correct? If so, how does it work on a scale RC heli. I am really interested in the idea that an RC heli might direct the tail via directional blasts of air. Is that it? I guess I'd really like to know what: mechanics,kit, engine, etc. it takes to get a scale looking Hughes 520 NOTAR in the air. Oh, by the way, how much would one of these babies cost? Thanks for the info!
04-16-2002 Over year old.
 
 
BigProp
Heliman
Location: Bay Area, CA

Oh and another thing...

How do they fly as compared to a standard tail rotor heli?
04-16-2002 Over year old.
 
 
helifan
Heliman
Location: Hamburg / Germany (4 years in L.A., CA, USA)

Hi BigProp,
Yes NOTAR stands for 'NO TAil Rotor' and it works in the scale R/C model the same way as it works in the real scale heli.

A fan is sucking in air from behind the main rotor (note the big wire netting area on pictures?) and blows it through the tail boom. You may note that the diameter of the tail boom is a little bit bigger too. Now I have two stories and I'm not 100% sure which one is true or if both might be correct. At the end of the tail boom you have either one outlet on each side and depending where you need the airstream to move the tail, it's been opened or you have one outlet which will be turned to the side you need it. Anyway, the tail is been moved around by "just" an air stream at the end of the boom rather than an air stream produces by a tail rotor system at the end of the boom.

This system makes it much saver to land in small areas without thinking too much to hit something with the spinning tail rotor which would be fatal.

Hope this helps a little bit. BTW, I don't know what it cost but it won't be cheap.
04-16-2002 Over year old.
 
 
Dr.Tim
Key Veteran
Location: Mojave Desert

VARIO !!!

Go to the Vario website www.variousa.com or call 1-805-553-9996 mention my name to Roger and he will double the price for you !!! Kidding!! These are some pretty good guys and they will work with you on what you need and DON"T Need!!!
Dr. Tim

From Simple minds come simple ideas! Starwood Models, Approach Engineering
04-16-2002 Over year old.
HOMEPAGE  
 
 
rob_jones
Key Veteran
Location: Oglethorpe, GA

NOTAR

Helifan is right. In addition to safety, a NOTAR has other advantages. You have a lower parts count. Which (in theory anyway) should reduce maintenance time and cost. Also, that's one less spinning thing to balance and lubricate. Hence, less vibration.

I thought about modifying an H500 fuselage using a small ducted fan impeller driven by the T/R output shaft. A hinged flap at the tip of the tail boom would control yaw similar to a conventional T/R.

I've never had the funds to finance such an expiriment, but it ought to work. Anybody care to invest??

-----
Team MRC Hirobo
I reject your reality and substitute my own.
04-16-2002 Over year old.
 
 
rsilvers
Senior Heliman
Location: Marshfield, MA

Dr. Tim. Why are you such a Vario fanatic? My impression is that they have neat things like 4 rotor heads, fenestroms, and notars. Do they have any advantages except for those neat features?
04-16-2002 Over year old.
HOMEPAGE  
 
 
Dr.Tim
Key Veteran
Location: Mojave Desert

Neat Features

Rsilvers, I Like the fact that Vario puts together probably the Best 3D , Trainers, Intermediate, And Scale Ships out there!! With Product Support to Boot!! Tough combination to find these days!! The Really "Neat" thing about Vario is the Scale heli's are made to fit most of the mechanic set they make!! Example ; Say I purchase a Sky Fox to learn to fly, then upgrade with a new fly-bar for 3D then decide to go scale, Well I can do it all with the same ship!!! One thing I hate is to have to go purchase this part here and that part there without knowing if they will all fit once I have them all!. Plus Vario's Gelcoat finish on there scale ships is sweet to work with!! All you have too do is give it a Hot Bubble bath(to remove mold release) sand down the seam, install the wood kit for your Mechanics, Cut windows and doors, Prep, Prime, Detail and paint!! Fanatic? Well Yep sure am!!
Dr.Tim

From Simple minds come simple ideas! Starwood Models, Approach Engineering
04-16-2002 Over year old.
HOMEPAGE  
 
 
The_Dave
Veteran
Location: Las Vegas, Nevada

Like Full Scale???

Helifan, you said:
Quote 
Yes NOTAR stands for 'NO TAil Rotor' and it works in the scale R/C model the same way as it works in the real scale heli.


That’s close but not quite. The full-scale machine uses a "shaped" tail boom along with bleed air jets along the boom. The shaped boom and jets working along with rotor down wash produce the "Conda Effect". The Conda Effect is what holds the tail boom in position. The full-scale machine then uses a blast of bleed air, directed by a rotating tail cone to induce yaw in either direction. So in the real model it is the tail boom itself that produces yaw stabilization and the tail cone provides movement on the yaw axis. On the Model the tail cone does both functions

Mark McAlpine - 2005 - We will never forget.
04-16-2002 Over year old.
HOMEPAGE  
 
 
gonzalom
Senior Heliman
Location: Northern California

Vario???

Well, I agree with Dr. Tim, Vario is all about quality and flexibility..... is amazing how modular is my petrol mechanics (gasser)..... I can change at any time for 3-4-5 blade head.... or a fenestron tail....... and to many ready scale fuses from vario..... not to mentioned that they probably have EVERTHING you need for your scale project..... Vario extensively test their products and if you care to fly your scale ship..... they would fly very well. There is a resonable price tag with Vario...... but if you consider experimenting and builing scale model with tons of problems I would asure you will spent a lot more $ and time..... As Dr. Tim said I am a fanatic of Vario too. Service of Vario USA is outstanding!!! and please don't think I am a rep....... just a fanatic too!!!!

Regards,

Gonzalo
04-17-2002 Over year old.
HOMEPAGE  
 
 
Copter Doctor
Elite Veteran
Location: daleville/ft.rucker, al

notar and you

well it seems like there are some pretty educated folks out there about the notar. i have seen a few notars where i work, the 520 and the 900 explorer. the pilot of the 520 says that the notar gives him peace of mind because of its reliability and safety however, that d@#%$ fan robs quite a bit of power compared to the standard version. well i dont know, it looked like he had plenty of power to do the fancy flying i managed to talk him into doing before he left. the explorer however seem to have no lack of power problems.....it is a twin, that helps. the rotor diameter to me looked awfully small for the chopper's size though.
anyway, being the big experimenter that i am, (i think my 58d is still the only one flying with the mast mounted sight in place which moves around. if someone else has done one, please holler at me) i have tried to do a notar using a concept 30. unfortunately the gear ratio was too low to turn my home made fan and on that bird there is little you can do to speed it up unless you have a machine shop in your basement.
i am not giving up though, i have a few more ideas to try before putting it to bed or into production as for what else i am working on, i have an Eh101. a new comanche, and a v22 osprey on the back burner whe i get everyone elses stuff built.. til next time, fly it scale

drive a rotary, fly a rotorcraft
04-17-2002 Over year old.
HOMEPAGE  
 
 
1 page1332 viewsPOST REPLY
ZoomsHobbies . HeliHobby . Ron’s HeliProz South

.
.
Scale Model RC Helicopters > What is a "NOTAR?"
 PRINT TOPIC Advertisers 

Subscribe to This Topic

Monday, December 1 - 9:42 pm - Copyright © 2000 - 2008 runryder.com | email | link to rr | runryder needs cookie