RunRyder RC
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1795 views POST REPLY
HomeScaleAircraftScale HeliScale Helicopter Main Discussion › Vario MD520N Project- Its Time!
01-16-2018 10:17 PM  8 months agoPost 1
Wemo

rrApprentice

Hampton Roads, VA

My Posts: All  Forum  Topic

Well, I've had this 1/6 Vario MD520N for about 4 years now. I've started getting it ready for the spring. I'm going to go old School by putting in a nitro as it was originally intended and see how it flies. I have an OF 5 bladed Head and OF Blades...I don't think these "Young Thunder Cats" never heard of OF. LOL.
Anyway, if I don't like the nitro setup, I have to get my fabricator to make me an e-conversion version and go from there. I will follow Ironside suite of the EDF fan setup.

"How high do they go? Are those things hard too fly? How much do they cost?

PM  EMAIL  GALLERY  Attn:RR  Quote
01-16-2018 10:23 PM  8 months agoPost 2
Copter Doctor

rrProfessor

Enterprise/ft.rucker ,al- home of army aviation

My Posts: All  Forum  Topic

Nice project, yeah its definitely time!
as for going electric, maybe Sandy (phoenix notar) will chime in as he has/had one and I remember him saying it was a challenge convering to electric compared to his MD900/902
His 520 seemed to do well as a nitro powered machine

drive a rotary, fly a rotorcraft

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-16-2018 10:30 PM  8 months agoPost 3
Wemo

rrApprentice

Hampton Roads, VA

My Posts: All  Forum  Topic

Thanks Emile. I've contacted Sandy on the other forum. I've gain knowledge by reading ALL his Notar knowledge on the other forum. Definitely a world of knowledge on these machines. I've in grained, 15,000RPMS in my brain for the fan. I'm confident it will work. lol

I'm ready for the Notar, "If" I have to convert to electric. I've calculated all aspects and some things I have to figure since I will do the EDF fan conversion for tail.

Daryl

"How high do they go? Are those things hard too fly? How much do they cost?

PM  EMAIL  GALLERY  Attn:RR  Quote
01-16-2018 11:35 PM  8 months agoPost 4
Notar

rrKey Veteran

Taxachussetts

My Posts: All  Forum  Topic

Check your OF blades as they are notorius for warping.

PM  EMAIL  GALLERY  Attn:RR  Quote
01-17-2018 12:02 AM  8 months agoPost 5
Wemo

rrApprentice

Hampton Roads, VA

My Posts: All  Forum  Topic

Thanks Notar. My OF Blades are in excellent condition.

"How high do they go? Are those things hard too fly? How much do they cost?

PM  EMAIL  GALLERY  Attn:RR  Quote
01-17-2018 01:21 PM  8 months agoPost 6
Ironside

rrApprentice

Baltimore, MD

My Posts: All  Forum  Topic

I think you'll really enjoy the build. I love mine even though life and weather won't let me fly it much If I can be of any assistance, don't hesitate to ask.

Ironside

PM  EMAIL  GALLERY  Attn:RR  Quote
01-17-2018 02:29 PM  8 months agoPost 7
Wemo

rrApprentice

Hampton Roads, VA

My Posts: All  Forum  Topic

Hey Ironside...you provided major information on the other forum just yesterday. I'm watching your progress like a hawk. Thanks for all of your replies and wealth of knowledge you have given me on the electric side of things. I can't wait to see the video when she is dialed in and flying FF. .
I want to take it back with Nitro...as original for now. I read some where that someone ran a Webra 91 P5 AAR engine with 30% and it ran great...that was with 5 blades. I love nitro and started out with scale years ago with it. Drawbacks, yes- but I like to tune an engine. I will be hitting you Pming you on Runryder if I have more questions.

Daryl

"How high do they go? Are those things hard too fly? How much do they cost?

PM  EMAIL  GALLERY  Attn:RR  Quote
01-18-2018 01:06 AM  8 months agoPost 8
Phoenix NOTAR

rrApprentice

Tallahassee, Florida USA

My Posts: All  Forum  Topic

Daryl,

Will you be using an EDF regardless of using nitro or electric for the main rotors?

Sandy

PM  EMAIL  GALLERY  Attn:RR  Quote
01-18-2018 12:47 PM  8 months agoPost 9
Wemo

rrApprentice

Hampton Roads, VA

My Posts: All  Forum  Topic

Hey Sandy....an honour for you to be on this thread with others. No I'm keeping it stock for nitro. I will use EDF for tail if doing e-conversion.

Daryl

"How high do they go? Are those things hard too fly? How much do they cost?

PM  EMAIL  GALLERY  Attn:RR  Quote
01-18-2018 01:26 PM  8 months agoPost 10
Phoenix NOTAR

rrApprentice

Tallahassee, Florida USA

My Posts: All  Forum  Topic

Daryl,

A few comments for you or other NOTAR builders to consider:

Any of my "nitro" NOTARS (I have had 3) would only fly reasonable if the air temperature was less then 80 degrees F, and not to much wind.
The only nitro engine that would work without overheating (for more than a few minutes) was the special Vario/Webra 75. This engine have a VERY large cylinder head for heat dissipation. I have tried the the recommended OS 70, OS 91's, Webra 91's, and others. All but the original Vario/Webra 75 would overheat powering a NOTAR with the fan. The 5 blade head made things considerably worse. Maybe you could use a small "computer" type fan to blow directly on the cylinder head, I never tried that option. I tried many brands of fuel, and found Byron Rotor Rage 30% to provide the longest run time without overheating or engine damage. I also used ceramic bearing in the Nitro engines.

When I first tried a 5 blade head on my MD520, it would not lift off the ground with out pirouetting. This was a Vario metal center block "bendix" style rotor head and blades. I only got success with a 5 blade head using the very light plastic center block Vario head with the 2 bolt blades 1500 mm diameter with the MD520, and 1630 mm diameter with the MD900 (electric).

You may want to compare the weight/mass of the OF rotor head to the Vario plastic twin bolt 1500 mm system. The rotating mass provide the torque, an the NOTAR system only has so much anti-torque available with Nitro engine power in that closed tight fuselage.

Just my 2 cents worth based on my experience and testing.

Good luck!

Sandy

PM  EMAIL  GALLERY  Attn:RR  Quote
01-18-2018 06:54 PM  8 months agoPost 11
Wemo

rrApprentice

Hampton Roads, VA

My Posts: All  Forum  Topic

Sandy....your input is greatly noted and appreciated. Thanks. I have engine options, such as: Webra 75 AAR P5 an O.S Max 91 FX-HGL (over sized head) and a Webra 91 P5 AAR & will run either or with 30% Rotor Rage. I will consider to run another fan for cooling purposes. Like it was mentioned if it doesn't work will focus on the e-conversion. I love a

Daryl

"How high do they go? Are those things hard too fly? How much do they cost?

PM  EMAIL  GALLERY  Attn:RR  Quote
01-18-2018 07:12 PM  8 months agoPost 12
Phoenix NOTAR

rrApprentice

Tallahassee, Florida USA

My Posts: All  Forum  Topic

Really big cylinder head........

Sandy

PM  EMAIL  GALLERY  Attn:RR  Quote
01-18-2018 07:39 PM  8 months agoPost 13
Phoenix NOTAR

rrApprentice

Tallahassee, Florida USA

My Posts: All  Forum  Topic

Here is an image of the metal Vario head that was too heavy for the NOTAR system, as well as some of my Webra 91 AAR experiences:

Sandy

PM  EMAIL  GALLERY  Attn:RR  Quote
01-18-2018 08:13 PM  8 months agoPost 14
Wemo

rrApprentice

Hampton Roads, VA

My Posts: All  Forum  Topic

Well that bites and good to know. Thanks Sandy. My Webra 91 doesn't have the big head. My Webra 75 is from Vario with Vario stamped on it. I think I will go with the O.S 91 FX-HGL.

"How high do they go? Are those things hard too fly? How much do they cost?

PM  EMAIL  GALLERY  Attn:RR  Quote
01-19-2018 12:51 AM  8 months agoPost 15
Notar

rrKey Veteran

Taxachussetts

My Posts: All  Forum  Topic

Does the OS 91 have a solid 8mm crank from the top bearing to the threads?

PM  EMAIL  GALLERY  Attn:RR  Quote
01-19-2018 01:47 AM  8 months agoPost 16
Wemo

rrApprentice

Hampton Roads, VA

My Posts: All  Forum  Topic

Same as the Webra 75

"How high do they go? Are those things hard too fly? How much do they cost?

PM  EMAIL  GALLERY  Attn:RR  Quote
01-19-2018 11:34 AM  8 months agoPost 17
Notar

rrKey Veteran

Taxachussetts

My Posts: All  Forum  Topic

Never saw that in a 91. I still have a couple of the OS 70 glow engines specifically for the Notar that Vario was using at one time.

PM  EMAIL  GALLERY  Attn:RR  Quote
01-20-2018 04:46 PM  8 months agoPost 18
old nitroman

rrVeteran

Naples florida

My Posts: All  Forum  Topic

years ago we used to add 1 -2 oz of castor oil to are Byron 30% to help with the heat. Had a futura in a zenth fuse OS 61sx I add 2 oz of caster oil to the fuel help wash away the heat. Here in summer its 100 plus and 98 % humidity. With and os8 plug. Cliff

E5s and E7se,and a 766, Roban bell 222 800 superscale,450 bell 4 bladed head,gobby 380and 420 ,180cfx

PM  EMAIL  GALLERY  Attn:RR  Quote
01-24-2018 08:45 PM  8 months agoPost 19
Ironside

rrApprentice

Baltimore, MD

My Posts: All  Forum  Topic

Wemo,

I know you were wondering how I went about getting the EDF to operate off of the Right Dial. There may be a better way but this is how I did it.

1. The first thing you need to do is go into your TX and disable the default functions of the Right and Left Dials (Knobs) if you haven’t already done so. By default these dials are linked to your pitch and throttle curve. Starting at 5:20 in this video, instructions on how to disable these dials are given:

Watch at YouTube

2. Next go into the TX Function screen and set Channel 7 to AUX1 (it's Governor by default) and then then set the “CTRL” for AUX1 to RD (Right Dial). You can then set Channel 11 within the TX (which is AUX1 by default) to unassigned, governor, or whatever you want

3. Next plug the JR lead from your ESC to be used with the EDF into Channel 7 on the receiver. Channel 3 should still be used for the main rotor’s ESC

4. Now using Castle’s guide “PDF: Fixed Endpoint Calibration” on the ESC http://support.castlecreations.com/...-support-videos , set up the EDFs ESC Endpoints on Channel 7

5. At this point you technically should have control of the EDF from the Right Dial. However, don't run it all the way up yet. You can quickly check functionality by turning the dial, just don't run it all the way up.

6. Next you'll need to look up your EDF motor’s specs and note both the rated continuous and max watts and amps.

7. Once you have this information connect a Watt Meter between the battery and EDF. Then while monitoring both the Servo Monitor screen on the TX and the display on the Watt meter, slowly turn the dial to see what juice the EDF is pulling from the batteries. This will also let you know at what point on the dial (via the Servo Monitoring Screen) you’ve reached the EDF’s motor continuous rating

I hope this helps but should you need additional information let me know.

Ironside

PM  EMAIL  GALLERY  Attn:RR  Quote
01-24-2018 09:10 PM  8 months agoPost 20
Wemo

rrApprentice

Hampton Roads, VA

My Posts: All  Forum  Topic

Valuable Valuable information. Thank you so much for sharing this insightful and needed information to move forward with my e-conversion project. This is what this hobby (IMHO) is about...sharing and helping out. I can't wait to see that NOTAR banking in your upcoming videos. BTW, have you thought of a paint scheme for your Notar?
Daryl

"How high do they go? Are those things hard too fly? How much do they cost?

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1795 views POST REPLY
HomeScaleAircraftScale HeliScale Helicopter Main Discussion › Vario MD520N Project- Its Time!
 Print TOPIC  Make Suggestion 

 5  Topic Subscribe

Monday, September 24 - 2:28 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

The RC discussion world needs to consolidate. RR is now one choice for that. Its software is cutting edge. It hosts on-topic advertising. Help RR increase traffic buy making suggestions, posting in RR's new areas (sites) and by spreading the word.

The RunRyder Difference

• Category system to allow Rep/Vendor postings.
• Classifieds with sold (hidden) category.
• Classifieds with separate view new.
• Answer PMs offsite via email reply.
• Member gallery photos with advanced scripting.
• Gallery photo viewer integrated into postings.
• Highly refined search with advanced back end.
• Hosts its own high end fast response servers.
• Hosts thousands of HD event coverage videos.
• Rewrote entire code base with latest technology.
• No off-topic (annoying) click bait advertising.
Login Here
 New Subscriptions 
 Buddies Online