RunRyder RC
WATCH
 1 page 1167 views POST REPLY
HomeAircraftHelicopterHIROBOHirobo SDX › SDX Preliminary Review & Questions
01-17-2010 07:00 AM  8 years agoPost 1
Parsifal

rrVeteran

Singapore

My Posts: All  Forum  Topic

Hi,

I just bought an SDX after flying a Vibe 50 for about a year and a half. The Vibe was feeling its age after a considerable amount of airtime and i decided to replace it with something that i thought would be easy to build / re-build and be used primarily as a beater (which is what i was using my vibe for)

Maidened the SDX this weekend with BLS 252s, spartan gyro and a 251 for the tail, multigov and a YS56sr.

Firstly, let me say my YS has been problematic from the get go...I have had 3 YS50s running throughout the life of my Vibe and they were all great. This one just does not seem to wanna find a sweet spot to operate in, its either rich and cold on the backplate or lean and hot, i can't seem to achieve a nice consistent balance and it changes its demeanor within one flight without me touching the needles, in a nutshell, its being weird. That said, it could just be a dud or it could be my not being able to tune it right, i just thought i should note this before following on to talk about the SDX in the interests of full disclosure. Oh, and i am using a hatori 566.

Ok, on to the SDX, i have to say, from the onset it feels a lot better built than my old sceadu. Everything seems stronger and the head is supremely tunable. I bought the dominik edition too which i felt was overpriced, but i wanted the DTS system.

Now, i have had 10 flights this weekend and i have some preliminary thoughts on the model which i wanted to share and to seek your thoughts on.

The model is extremely responsive, even more so than the vibe with an 11/11 setup. this is a definite plus in terms of the head design.

However, i have a few issues with the model which i wanted to put out there for your comments.

Firstly, there is a significant amount of slop in the head when compared to my vibe. Am i doing something wrong here or is it just something that one lives with and it sorts itself out when fully spooled up? It does not feel as locked in as my vibe did.

Second, the tail is a little weak feeling compared to the vibe, again, is this a setting issue or is it just something that one gets used to. I decided to use the standard tail blades to start of with and i am hoping that switching to a set of stiff carbon blades will solve it.

Thirdly, the tail control linkage makes a bloody racket with the sleeve rattling about, how have you guys quietened this down? is there a was to replace it with a carbon rod without reverting to mounting the servo on the tail?

I read a whole bunch of reviews here before buying it and whilst i have to say it is a much nicer model than the Sceadu in just about every way, i am kinda disappointed at this point vis a vis the vibe 50. Am hoping this will change as i fly it more or figure out what the hell i have done wrong.

Open for comments.

Thanks.

Pars

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-17-2010 07:12 AM  8 years agoPost 2
TMoore

rrMaster

Cookeville, TN

My Posts: All  Forum  Topic

Since you have 10 flights on the machine go back and tighten up all of the balls that screw into plastic.

The stock tail blades while better than the old ones simply don't have the power of CF blades.

The tail pushrod has been a non issue for me. Make sure you have a smooth engine/clutch setup. It sounds like that may be an issue with your cranky YS.

TM

Delayed Response Operator Not Engaged
AMA SECTION 336 = Good
Drones = EVIL

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-17-2010 08:27 AM  8 years agoPost 3
kej

rrApprentice

Denmark

My Posts: All  Forum  Topic

I have filled the tail pushrod tube with WD40 and I use CA to keep it in the holders on the boom. Much better.
Remember to use epoxy on the flybar arm where the alu part go into the plastic arm.
Also remember to use epoxy where the RC tray is mounted on the frames.

Considering the adjustability of the head I am very sure that the SDX can be made to have just the feeling you want. A smooth engine is off course always a necessity.

Which main blades do you use and how much weight have you kept in the paddles?

I use stock tail blades with no issues on power. You can hardly judge that before the engine is running good.

Kim Jensen

PM  EMAIL  GALLERY  Attn:RR  Quote
01-17-2010 10:48 AM  8 years agoPost 4
Parsifal

rrVeteran

Singapore

My Posts: All  Forum  Topic

Thanks...

I retightened everything after the 5th flight just to be sure and replace the tail blades with CF ones. Mainblades are CY Stick Bangers and i am using RJX paddles whilst i wait for my Vs to arrive, they are clones of the Vs so i thought they'd suffice for the moment. Getting V blade stuff these days is a bloody nightmare.

The head adjustability is simply outstanding.

Admitedly, the engine is inconsistent, so this could be the cause of my malaise.

I'm going to give it one more weekend with the YS before i switch out to an OS55, its a wierd state of affairs i have to say, its been a long time since i've had a dodgy engine.

Thanks again.
Regards,

Pars

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-17-2010 01:55 PM  8 years agoPost 5
Piyaphan1

rrApprentice

Bangkok, Thailand

My Posts: All  Forum  Topic

regarding the blades on the SDX. I have been comparing between V-Blades TST, Raddix SB, and SAB. I use Funkey carbon paddle. For Raddix SB, it is good for stick banging but I didn't like the pitch-up in the fast forward flight. The V-Blades is the most stable, FFF is also good. The SAB fits in between those two. I'm now waiting for a pair of normal Raddix blades to try on.

Piyaphan
TurbulenceD3 YS-SR3C / TurbulenceD3 YS-SR3C-RR / Lepton

PM  EMAIL  GALLERY  Attn:RR  Quote
01-17-2010 03:21 PM  8 years agoPost 6
Against Gravity

rrVeteran

Pottstown PA

My Posts: All  Forum  Topic

Tail Slider sleeve
I used fuel line, and cut in 3/4" piece's. slide them on next to each holder. that stopped the rattling on mine.
There really should not be any slop in the head, Unless something is loose. Pritty tight setup, perfect tracking.

PM  EMAIL  GALLERY  Attn:RR  Quote
01-17-2010 03:49 PM  8 years agoPost 7
ttrip06

rrApprentice

Central Pa

My Posts: All  Forum  Topic

Could you give us some more detail about why/where the head slop is? Specifically is it something you can see on the bench or is it the perception of the model in flight?

I have no ratlle or noise from my sdx, is there any vibration in the model at the tail fins or canopy?

Tim Tripoli

Team Futaba, Rail Blades
Team Crash
ProggressiveRC

PM  EMAIL  GALLERY  Attn:RR  Quote
01-17-2010 05:25 PM  8 years agoPost 8
payne1967

rrElite Veteran

uk

My Posts: All  Forum  Topic

firstly put a good engine in the model
then the tail will be better and fit the carbon tail blades
and the vibration should go (as long as the model has been built correctly)
as for the head no slop in mine, so check that is assemble correctly
a hirobo just doesn't wear after 10 flights

on my sdx the tail push rod tube has a little slice of fuel tune either side of the holder

please replace the bad motor and recheck the assmble of your sdx
and enjoy it

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-17-2010 09:46 PM  8 years agoPost 9
Richardmid1

rrProfessor

Leeds, England

My Posts: All  Forum  Topic

If you are using a governor magnet in the fan you may need to remove some weight around the magnet with a small drill (in the plastic fan not the magnet itself) to balance the fan, this will get rid of the vibes.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-17-2010 10:59 PM  8 years agoPost 10
John Benario

rrVeteran

Las Vegas

My Posts: All  Forum  Topic

Any noise from the tail rotor pushrod sleeve is caused by vibration.

Have you balanced the:

fan
flybar
blades on the head
tail rotor hub vertically and horizontally
tail blades on previously balanced hub

?????

If the answer to all these is not yes you have some vibratio that is exciting the sleeve/pushrod.

John Benario

Team highest quality
Futaba radios
Cool Power fuel
John's Ultimate building school

PM  EMAIL  GALLERY  Attn:RR  Quote
01-18-2010 01:52 AM  8 years agoPost 11
Parsifal

rrVeteran

Singapore

My Posts: All  Forum  Topic

Balanced the fan after installing the magnet, i didn't do the tail hub or any of the blades (i have not had to balance blades in a long time).

i bought this as a beater to move away from the rather involved builds/re-builds of the vibe. I am not intending on balancing/dial indicating everything save for the fan and the start shaft, i will live with the consequences of that and not complain.

That said, i may be overstating the rattling, its not a loud rattle, its something that happens as the model is running up to speed, not in flight, its not a vibration related issue per se in my opinion, i reckon the fuel tubing / silicon on the sleeve guides will sort it out.

Realised my mistake with the engine, stupid stupid mistake not having used a YS 3 needle carb, i got the needles mixed up. This may solve my engine issues. I was a dumbass.

Slop was in the head system from the onset, it is not wear related (i.e. nothing to do with the 10 flights), moving the flybar around there seems to be a lot of play between the flybar/washout/swash, this is partially why the dominic edition comes with a metal swash guide. I have not had enough airtime to determine if the head feels sloppy in flight, at the moment, i can't make a call on this given the engine. Just wanted to check if everyone had a decent amount of play within the system on the ground.

I am waiting for v-blades to arrive, my blade/paddle setup of choice on all my helis. Its just getting them these days is not so easy anymore.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-18-2010 10:57 AM  8 years agoPost 12
Richardmid1

rrProfessor

Leeds, England

My Posts: All  Forum  Topic

There is some play between the washout pins and the head block slots but I have never had a heli that hasn't. On mine ONE washout control arm has a bit of play and the other has none, impossible to tell in flight though.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
WATCH
 1 page 1167 views POST REPLY
HomeAircraftHelicopterHIROBOHirobo SDX › SDX Preliminary Review & Questions
 Print TOPIC  Make Suggestion 

 9  Topic Subscribe

Monday, September 24 - 4:30 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