RunRyder RC
WATCH
 1 page 1261 views POST REPLY
HomeAircraftHelicopterHelicopter Main Discussion › Tail setup help 700e DFC
11-30-2015 07:27 AM  34 months agoPost 1
v58 fuy

rrVeteran

UK - Kent

My Posts: All  Forum  Topic

Guys,

Am building a new 700L Dominator, have built loads of heli's in the past.

I have some questions about the tail setup with my mini vbar:

1) Firstly I notice that the servo when installed as per manual, ends up with the servo arm ball offset from the centre of the boom, is this normal - I'm using the standard 6 spoke servo arm and have the ball mounted so it is facing me when looking at the front of the servo as per manual.

2) The manual calls for the servo ball to be on the outer hole which is about 13mm from the centre - but with this setting my vbar throws are symmetrical at around 135 each, which is higher than vbar suggests you use, ideally aiming for throws of max 120?

Your help on the above would be very helpful.

David

PM  EMAIL  GALLERY  Attn:RR  Quote
11-30-2015 01:27 PM  34 months agoPost 2
mr dan

rrVeteran

Stockton Calif

My Posts: All  Forum  Topic

Can you adjust your ball link ends? What I learned is ,doesnt matter what the book sugested as far as pushrod length, its what vbar wants.

"R.I.P Roman" Citizen 0094 in the Nation

PM  EMAIL  GALLERY  Attn:RR  Quote
11-30-2015 03:12 PM  34 months agoPost 3
dchekas

rrKey Veteran

Farmington, CT

My Posts: All  Forum  Topic

I have had great success running 15mm on the tail servo horn. This should improve your geometry.

The centering of the pushrod in the boom is normal, not that critical.

Team Align, Team Futaba, Team Byron Fuels, Team Thunder Power

PM  EMAIL  GALLERY  Attn:RR  Quote
11-30-2015 04:07 PM  34 months agoPost 4
rcflyerheli

rrKey Veteran

Granbury, TX USA

My Posts: All  Forum  Topic

I agree with Dave on the centering on the boom. As long as the center guide on the pushrod is set so that the pushrod is straight, there won't be any issue.

On your resolution, if I recall, there are two ball attach locations on the bellcrank on the tail end. If you haven't, try moving the ball closer to the pivot point, or do as has been suggested and get a longer servo arm.

Goblin 700, Trex 700DFC, Gaui X7, Logo 690SX, Logo 600SX; Trex 470 Trex 500
Amain Team Rep

PM  EMAIL  GALLERY  Attn:RR  Quote
11-30-2015 05:59 PM  34 months agoPost 5
v58 fuy

rrVeteran

UK - Kent

My Posts: All  Forum  Topic

Yes was comparing the tail on my V2 with the 700L and have just noticed the two holes on the crank on the 700L, this would account for the larger than ideal vbar end points - wonder why Align show a 13mm servo with the outer hole on the bellcrank?

Thanks guys,

David

PM  EMAIL  GALLERY  Attn:RR  Quote
11-30-2015 06:33 PM  34 months agoPost 6
rcflyerheli

rrKey Veteran

Granbury, TX USA

My Posts: All  Forum  Topic

It's Align, what else can I say, other than they try to cover all bases.

Goblin 700, Trex 700DFC, Gaui X7, Logo 690SX, Logo 600SX; Trex 470 Trex 500
Amain Team Rep

PM  EMAIL  GALLERY  Attn:RR  Quote
11-18-2016 09:20 AM  22 months agoPost 7
rotorboy2.4gh

rrNovice

saint louis mo.

My Posts: All  Forum  Topic

Ball distance
Going from 13mm to 15mm will make his geometry and resolution worse and increase his 135 numbers. Pulling the ball closers to center will shrink his numbers down and give much better resolution while keeping the vbar in its control loop. Hope that helps.

One is the loneliest number-- BUY EM ALL!!!!!!!

PM  EMAIL  GALLERY  Attn:RR  Quote
11-18-2016 10:07 PM  22 months agoPost 8
dchekas

rrKey Veteran

Farmington, CT

My Posts: All  Forum  Topic

You are correct that moving the ball closer will improve resolution, but this will lead to less throw and force the tail limits to be higher than 135, outside of the optimal tail geometry.

Increasing the ball distance from the center of the servo is going to increase the amount of throw in each direction, which will in turn, reduce the tail limits settings he has.

Getting the geometry to close to 100/100 should offer the best compromise of resolution, torque, and speed.

Team Align, Team Futaba, Team Byron Fuels, Team Thunder Power

PM  EMAIL  GALLERY  Attn:RR  Quote
11-25-2016 10:08 PM  22 months agoPost 9
rotorboy2.4gh

rrNovice

saint louis mo.

My Posts: All  Forum  Topic

Resolution
I stand corrected. Yes, resolution is better, but numbers grow with the closers ball distance. I wound up using 15mm and all was great and within control loop. Frank.

One is the loneliest number-- BUY EM ALL!!!!!!!

PM  EMAIL  GALLERY  Attn:RR  Quote
11-26-2016 10:01 AM  22 months agoPost 10
rcflyerheli

rrKey Veteran

Granbury, TX USA

My Posts: All  Forum  Topic

I am in Madrid right now, so I am going from memory, but AFIK, my 700 DFC worked just fine with the tail ball on the inside hole, and using the outside hole on a six arm servo output.

We are scheduled to leave to come home tomorrow, and I will chack to be sure I'm not putting out bogus info.

Goblin 700, Trex 700DFC, Gaui X7, Logo 690SX, Logo 600SX; Trex 470 Trex 500
Amain Team Rep

PM  EMAIL  GALLERY  Attn:RR  Quote
11-26-2016 10:57 PM  22 months agoPost 11
wc_wickedclown (RIP)

rrProfessor

long beach calif

My Posts: All  Forum  Topic

this is how i setup my 700 and 600
seems you cant adjust the tail rudder control rod isw not long enough

Watch at YouTube

Insha Allah made in america

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
11-30-2016 04:58 PM  22 months agoPost 12
rcflyerheli

rrKey Veteran

Granbury, TX USA

My Posts: All  Forum  Topic

Well, I finally got back home after a very long (or so it seemed) vacation to Madrid and Seville. Had a great time, but the trip back was a killer. I'll give anyone who is thinking on going on Europe on a 787 Dreamliner a heads up. If you ride back in coach and are taller than about 5'5" it's gonna be a miserable uncomfortable trip. I'm 6'3" and weigh around 250 and I have to say it was one of the most uncomfortable trips I have ever taken.

Now back to the 700. I may be an old pfart, but at least my memory is still pretty good. I am running my tail pushrod on the inner hole on the tail end and on the outside of the 6 arm Futaba wheel. My setup numbers are as close as I can get them at 108 and 110 on the Vbar Control screen. I haven't ever had an issue with lack of control authority on the tail.

Maybe part of that is that I have run the nitro boom on this bird since the get go, and it gives me 15mm more length. Not doing the hard 3d that Jamie and Ben do on their Dominators with what I imagine is the shorter boom, I don't get the insane pyro rates they do, but they are plenty fast enough for me.

Good luck.

Goblin 700, Trex 700DFC, Gaui X7, Logo 690SX, Logo 600SX; Trex 470 Trex 500
Amain Team Rep

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 1261 views POST REPLY
HomeAircraftHelicopterHelicopter Main Discussion › Tail setup help 700e DFC
 Print TOPIC  Make Suggestion 

 3  Topic Subscribe

Sunday, September 23 - 7:28 am - 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