RunRyder RC
 8  Topic Subscribe
WATCH
 2 pages [ <<    <     1     ( 2 )    >    >> ] 2427 views POST REPLY
10-08-2013 06:06 PM  4 years agoPost 21
VANHELI

rrVeteran

Omaha,Nebraska

My Posts: All  Forum  Topic

Which head would you use?
I will be going with the the rigid core head.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-08-2013 07:03 PM  4 years agoPost 22
ZS-JAF

rrVeteran

Houston, TX

My Posts: All  Forum  Topic

I would get the head with the followers as well. The HPS head flies better with my headspeeds.

I have a 3D heli, I don't understand why it doesn't do 3D

PM  EMAIL  GALLERY  Attn:RR  Quote
10-09-2013 04:22 PM  4 years agoPost 23
McKrackin

rrProfessor

Lucasville,Ohio

My Posts: All  Forum  Topic

Definitely believe in the swash driver.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-09-2013 04:30 PM  4 years agoPost 24
McKrackin

rrProfessor

Lucasville,Ohio

My Posts: All  Forum  Topic

To say it is not a goblin copy to some extent is just being a brand fan boy.
I ONLY spoke to the comment about the servo lay out being a direct copy when in fact,they are not even similar...Not similar in any way except that they both have three servos.

Sure,a lot of the overall design is similar to the Goblin and not even Avant denies that...They openly admit it.
They claim to have taken existing tech and refined it.

And for the record...I have never said that the Avant is a better heli than the Goblin...For all intents and purposes,the Avant doesn't even exist.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-03-2014 07:01 PM  4 years agoPost 25
nismoflip

rrVeteran

Union City, CA, USA

My Posts: All  Forum  Topic

How do you guys feel about the constant diameter tail boom without boom supports? I'm all for simplicity but I prefer the tapered boom like the Goblin when it comes to designs without boom supports. Of course going that route will undoubtedly increase costs so that's maybe not a viable design solution. If the Mostro boom diameter is larger than the standard 700 boom then that could make up for any loss in boom bending stiffness. Not talking trash, just asking for opinions. I'm a big Avant fan and almost certainly buying the Mostro when it comes out.

PM  EMAIL  GALLERY  Attn:RR  Quote
03-03-2014 08:08 PM  4 years agoPost 26
BradNewman

rrApprentice

Orange, Tx-USA

My Posts: All  Forum  Topic

Good question, I hadn't really thought about that. Correct me if I'm wrong, but wouldn't this be the first Heli to use a traditional boom without supports?

Remember to keep everything balanced!

PM  EMAIL  GALLERY  Attn:RR  Quote
03-03-2014 08:25 PM  4 years agoPost 27
JKos

rrProfessor

Redondo Beach, CA

My Posts: All  Forum  Topic

wouldn't this be the first Heli to use a traditional boom without supports?
No, it is not. I know of at least the Logo 10 which did not and that was quite a while ago.

- John

RR rules!

PM  EMAIL  GALLERY  Attn:RR  Quote
03-03-2014 09:16 PM  4 years agoPost 28
BradNewman

rrApprentice

Orange, Tx-USA

My Posts: All  Forum  Topic

JKos,
Thank you for correcting me. Although even some of the Logo 10's had boom supports. Here are a couple pics both ways.

Anyway, I should have been more specific. I was really referring to the larger size helis, because in fact there are many small helis that do not use boom supports.

Remember to keep everything balanced!

PM  EMAIL  GALLERY  Attn:RR  Quote
03-03-2014 09:46 PM  4 years agoPost 29
eddiscus

rrElite Veteran

Dumont, NJ-USA

My Posts: All  Forum  Topic

Banshee as well.

Logo Xxtreme 800
Logo 700
Citizen 142
Synergy 766
TDR 2

PM  EMAIL  GALLERY  Attn:RR  Quote
03-03-2014 10:58 PM  4 years agoPost 30
BradNewman

rrApprentice

Orange, Tx-USA

My Posts: All  Forum  Topic

Ahh yes, how could I forget the Banshee?

Remember to keep everything balanced!

PM  EMAIL  GALLERY  Attn:RR  Quote
03-04-2014 12:17 AM  4 years agoPost 31
nismoflip

rrVeteran

Union City, CA, USA

My Posts: All  Forum  Topic

I did a little digging and found that the Compass Atom 500 (no boom supports) uses the same diameter boom as its bigger brother the 6HV.

I know boom ODs are all over the map but it looks like a T-rex 700 uses 21.5mm and a Raptor 90 uses 25mm. Curious to see if the Mostro will be in the 25mm-ish range.

PM  EMAIL  GALLERY  Attn:RR  Quote
03-04-2014 12:44 AM  4 years agoPost 32
JKos

rrProfessor

Redondo Beach, CA

My Posts: All  Forum  Topic

One could do some photogrammetry on the images/pictures that have been provided to determine the boom diameter.

- John

RR rules!

PM  EMAIL  GALLERY  Attn:RR  Quote
03-04-2014 12:48 AM  4 years agoPost 33
nismoflip

rrVeteran

Union City, CA, USA

My Posts: All  Forum  Topic

A little bit more digging:

From the manufacturer's pic, you can see the boom diameter with respect to the JR 8717HV servos. The 8717s are 21mm thick. Just visually scaling the boom to the servos, I'm guessing the boom is about 25mm. Also the fixed length (pod side) looks to be substantial. All is good. I'll shut up now

JKos,

You're method would be much better.

PM  EMAIL  GALLERY  Attn:RR  Quote
03-04-2014 12:55 AM  4 years agoPost 34
JKos

rrProfessor

Redondo Beach, CA

My Posts: All  Forum  Topic

I came up with 1.2" or about 30 mm based on a side on picture on the web site. I'll try on a couple more photos and see if I get about the same or not.

Yep, I'm getting about 30 mm. Used both the servos and the motor in a few photos and get the same answer.

- John

RR rules!

PM  EMAIL  GALLERY  Attn:RR  Quote
03-04-2014 01:21 AM  4 years agoPost 35
nismoflip

rrVeteran

Union City, CA, USA

My Posts: All  Forum  Topic

Nice!!! Thanks for that calc JKos. I tried running some sectional modulus calcs to compare a 25mm boom against a 30mm boom (both without supports) but I have no idea what the wall thickness would be for a 30mm boom. I'm guessing the wall thickness for a 25mm boom is 1mm. 1.5mm for the 30? Assuming those wall thicknesses are right, I came up with a 50% increase in sectional modulus between the 25 and 30mm booms. Again, nice!!!

PM  EMAIL  GALLERY  Attn:RR  Quote
03-04-2014 03:46 AM  4 years agoPost 36
kumar2494

rrNovice

Long Island, NY

My Posts: All  Forum  Topic

The boom is made only from carbon fiber (not aluminum with carbon wrap) so it is extremely stiff. The boom clamps are very rigid and placed far apart, and the wall thickness is much thicker than any other conventional boom. When I first got a chance to handle it, I tried to bent the boom by hand but it didnt flex at all.

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <     1     ( 2 )    >    >> ] 2427 views POST REPLY
 Print TOPIC  Make Suggestion 

 8  Topic Subscribe

Thursday, April 26 - 12:46 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online