R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Radio and Electronics

Reply
 
Thread Tools Search this Thread
Old 05-09-2011, 01:05 AM   #4951
Tech Addict
 
AGNO's Avatar
 
Join Date: Dec 2009
Location: Firenze Italy
Posts: 609
Default

Quote:
Originally Posted by TeamWTF View Post
I had a look at the SP site in their 'setups' section. For a large track they recommend 6.3-6.5 FDR for 17.5 boosted.... Thats one slow car! I use 6.0 on small tracks... Been down under 5.0 for larger tracks.

Is their software the same? Seems it may have more timing (Despite the same number of STEPS) available based on these FDR's
With the latest FW 211 I had to further increase the FDR with Novak 17.5, are increased up to 6.9 FDR on medium track (straight 30 meters) with very good results concerning speed and temperature.
__________________
Team GMV / RC electric AS Laurenziana
Hot Bodies TCXX - HW Xerun - IP - Spec-R
AGNO is offline   Reply With Quote
Old 05-09-2011, 01:16 AM   #4952
Tech Fanatic
 
TeamWTF's Avatar
 
Join Date: Apr 2010
Location: Newcastle, Australia
Posts: 971
Trader Rating: 10 (100%+)
Default

I'll try higher ratio's then.

Though in the past they have been too slow. Do you guys use much motor timing? I'm not familiar with the Duo1 so comparing that does not help... I have run the Duo2 & Duo3

Recently ran the summer nats (Fairy Meadow) with 5.4 fdr seemed to work nicely. I dont have another race for about 3 weeks but it will be good to try these things. No permanent track locally does not help.

Have not played too much with this software but just noting my observation that that high of a ratio would lack top end.

Cant wait to try!

Cheers
__________________
T.O.P. Racing Australia www.topracing.net.au
TeamWTF is offline   Reply With Quote
Old 05-09-2011, 02:11 AM   #4953
NTS
Tech Initiate
 
Join Date: Dec 2010
Posts: 33
Default High speed brake problem...

Quote:
Originally Posted by Benzaah View Post
We have a local racer ( hi MIke) who always complains about poor brakes. Novak motors are prone to having poor brakes. Im not sure about the X12 as hardly anyone runs them here but do yourself a favour and get a D3 motor and you will have more brakes than you know what to do with. I have mines set at 100 on esc and 75% on transmitter and that is more than enough.
Benzaah,

The D3 does sound like a good motor and may well have stronger brakes but my complaint is with the delay in the braking effect from high speed and not the overall power. This delay effect is the same with the X12 and the Novak SS so I'm guessing its an ESC issue. The brakes were very good on the X12 with my previous SXX StockSpec ESC and perfectly adequate with the SS.

Thank you for the D3 tip though as I have been considering a new motor for more speed

Nick
NTS is offline   Reply With Quote
Old 05-09-2011, 08:15 AM   #4954
Tech Apprentice
 
Join Date: May 2011
Posts: 53
Default

Hi Nick,

At Aldershot i had no brakes with 100% EPA on TX but as soon as i turned the EPA down to 80% i instantly had good brakes
mcdoogle is offline   Reply With Quote
Old 05-09-2011, 01:00 PM   #4955
NTS
Tech Initiate
 
Join Date: Dec 2010
Posts: 33
Default

Hi Mike,

Fancy seeing you here. I'll try the EPA at 80%, did you re-calibrate afterwards or just run it like that?

Nick
NTS is offline   Reply With Quote
Old 05-09-2011, 01:06 PM   #4956
Tech Elite
 
defcone's Avatar
 
Join Date: Feb 2009
Location: Sydney
Posts: 2,335
Trader Rating: 15 (100%+)
Default

Anyone happen to have a setup with a 17.5t x12 on a medium track? Use the search and returned no results. Thanks.
defcone is offline   Reply With Quote
Old 05-09-2011, 01:40 PM   #4957
Tech Master
 
Benzaah's Avatar
 
Join Date: Feb 2008
Location: Australia
Posts: 1,967
Trader Rating: 21 (96%+)
Default

Quote:
Originally Posted by defcone View Post
Anyone happen to have a setup with a 17.5t x12 on a medium track? Use the search and returned no results. Thanks.
Run the x12 on the 2 dot timing and reduce boost and turbo by 10 overall from a duo type set up.

Eg drrs 8
start rpm 4000
boost 36
turbo 18
delay 0.2
turbo ramp 18
timing acc 300

X12 have a lot of guts and do like temps in the 90's.
__________________
AERCCC - ARCR - RRCSA

Adelaide RC

Walter Rc Hobby
Benzaah is offline   Reply With Quote
Old 05-09-2011, 01:40 PM   #4958
Tech Master
 
Benzaah's Avatar
 
Join Date: Feb 2008
Location: Australia
Posts: 1,967
Trader Rating: 21 (96%+)
Default

Sometimes when you think you have no brakes it is actually the brakes locking up on you and your car sliding instead of stopping. I have run all the software since 518 and have found the transition from on throttle to brakes the best on the new 211 software. I really liked the 1224 software and thought that it is slightly faster than 211 but with higher temps and not as nice brakes. i can handle a little less speed as it helps lap times along the way.

As for the Duo motors the Duo 1 was a beast of a motor and the quality of the magnets in these motors was very high. This quality of magnet seems to have degraded over the releases although they seem to have it sorted again with the D3. This could also be the quality of the epoxy's they are using on the motors now and being able to handle all the extra timing we are throwing at them.

I ALWAYS run a little bit of motor timing. Not too much usually around the 1st tick is a good spot. Motors do not quite sing like they do when you have a touch of motor timing added. If you have a motor dyno handy you are looking for around 2250kv at 1 amp draw and around 19500 rpm. If you stick to a tuner like Express you will get great numbers and i have found some Fantom motors to be in this league also. Sp motors get similar kv and amp ratings but with lower rpm at around 18500 rpm and ballistic motors around 19000. I have most of my Duo motors dyno'd to the above figure and have no problems changing my motors and keeping the speed control settings the same. Great for big events when you dont have time to have a practice run and you are running some what on the edge of destruction.
__________________
AERCCC - ARCR - RRCSA

Adelaide RC

Walter Rc Hobby
Benzaah is offline   Reply With Quote
Old 05-09-2011, 08:32 PM   #4959
Tech Elite
 
COBRARACING's Avatar
 
Join Date: Nov 2007
Posts: 3,207
Default

Hi Guys

Just to let all of you know the following motors of the xerun series are now roar approved and listed in on roar's website

21.5T
17.5T
13.5T
11.5T
10.5T
8.5T
6.5T
5.5T
4.5T
3.5T

1/8TH SCALE 2000KV AND 2250KV

All motors are approved in the blue and Grey versions.

http://www.roarracing.com/approvals/...lessmotors.php


thank you guys for all your support .


regards Angelo
__________________
Email : teamcobraracing@gmail.com or ae@hobbywing.com
Repair service Address
Hobbywing Technology Co., Ltd.
4th Floor, 3rd Building, KeLunTe Industrial Park, ShangLiLang, BuLan Road, LongGang District, ShenZhen, China
COBRARACING is offline   Reply With Quote
Old 05-09-2011, 08:55 PM   #4960
Tech Initiate
 
Join Date: May 2005
Posts: 38
Trader Rating: 8 (100%+)
Smile

Quote:
Originally Posted by COBRARACING View Post
ezrun no ,software for 5.5T on 120amp xerun run 528 mod .
Thank you...i got the esc set to 528 but do i need to do anything for the 2-in-1 box? Seriously, i am lost whether i do an upgrade in the 2-in-1 tab and what version should be used? I downloaded v1.63 and given a few choices in the 2-in-1 tab. Thanks for any assistance rendered here.

Regards,
T
sLowHoG is offline   Reply With Quote
Old 05-09-2011, 10:30 PM   #4961
Tech Elite
 
COBRARACING's Avatar
 
Join Date: Nov 2007
Posts: 3,207
Default

Quote:
Originally Posted by sLowHoG View Post
Thank you...i got the esc set to 528 but do i need to do anything for the 2-in-1 box? Seriously, i am lost whether i do an upgrade in the 2-in-1 tab and what version should be used? I downloaded v1.63 and given a few choices in the 2-in-1 tab. Thanks for any assistance rendered here.

Regards,
T
I will sort it out for you im getting on a flight now back to Australia so give me 24 hours and i will reply to you .

regards Angelo
__________________
Email : teamcobraracing@gmail.com or ae@hobbywing.com
Repair service Address
Hobbywing Technology Co., Ltd.
4th Floor, 3rd Building, KeLunTe Industrial Park, ShangLiLang, BuLan Road, LongGang District, ShenZhen, China
COBRARACING is offline   Reply With Quote
Old 05-09-2011, 10:33 PM   #4962
Tech Elite
 
COBRARACING's Avatar
 
Join Date: Nov 2007
Posts: 3,207
Default

Hi Guys

More good news all the xerun esc's have now been granted Roar approval running the 508 zero timing software .

please see the roar link list below

http://www.roarracing.com/?page_id=737


regards Angelo
__________________
Email : teamcobraracing@gmail.com or ae@hobbywing.com
Repair service Address
Hobbywing Technology Co., Ltd.
4th Floor, 3rd Building, KeLunTe Industrial Park, ShangLiLang, BuLan Road, LongGang District, ShenZhen, China
COBRARACING is offline   Reply With Quote
Old 05-09-2011, 10:41 PM   #4963
Tech Addict
 
Johnny-RC's Avatar
 
Join Date: Oct 2009
Location: Modesto, CA
Posts: 676
Trader Rating: 24 (100%+)
Default

Quote:
Originally Posted by COBRARACING View Post
Hi Guys

More good news all the xerun esc's have now been granted Roar approval running the 508 zero timing software .

please see the roar link list below

http://www.roarracing.com/?page_id=737


regards Angelo
This is very good news!!! Thanks Angelo
__________________
Products I run
| Hobbywing | Nano-Tech | Tenshock | Savox | Airtronics | Team Associated | AKA |
www.modestorc.com
Johnny-RC is offline   Reply With Quote
Old 05-10-2011, 01:47 AM   #4964
NTS
Tech Initiate
 
Join Date: Dec 2010
Posts: 33
Default High speed brake problem...

Quote:
Originally Posted by NTS View Post
Hello,

I'm running the Xtreme stock in 13.5 touring. First time out on friday night and generally the ESC went very well, the car was quick enough and the temps reasonable so still has potential to go quicker. The issue I did have was a distinct lack of brakes from high speed, basically hit the brake at the end of the straight and no response. Once the car had coasted down a bit the brakes seemed to come in and were strong enough to stop reasonably quickly. This is also apparent on the bench with a delay in braking from high speed.

Tried various settings and two different motors as a club mate said he had seen the same issue with a Speed Passion ProStock / X12 combination.

30m x 15m carpet track

Software 211
LRP x12 13.5 (-10 insert)
fdr 7.25
1. Running Mode = Fwd / Brake
2. Drag Brake = 0%
3. Low Voltage = 3.0v
4. Start Mode = Level 4
5. Max Brake = 100%
6. Max Reverse = 100%
7. Initial Brake = 0%
8. Neutral Range = 6%
9. Boost Timing = 34
10. Turbo Slope = 18
11. Over-heat = On
12. Turbo Timing = 0 (yes zero)
13. Boost Start RPM = 6000
14. Turbo Delay = 0.4s
15. Timing Punch = 450 rpm/deg

Also tried with Novak SS 13.5 with the following changes:

9. Boost Timing = 44
12. Turbo Timing = 20
13. Boost Start RPM = 3000
14. Turbo Delay = 0.3s

Both motors had good speed and reasonable temps, smooth and nice to drive with the exception of the poor brakes.

Can anyone suggest what I should be doing differently?

Cheers,

Nick
Quote:
Originally Posted by Benzaah View Post
Sometimes when you think you have no brakes it is actually the brakes locking up on you and your car sliding instead of stopping. I have run all the software since 518 and have found the transition from on throttle to brakes the best on the new 211 software. I really liked the 1224 software and thought that it is slightly faster than 211 but with higher temps and not as nice brakes. i can handle a little less speed as it helps lap times along the way.
.
Benzaah,

Thank you for the thought and I know what you mean about locking wheels making the braking seem poor but that clearly isn't my current problem as the car doesn't slow at all when the brakes are first applied. If I was locking the wheels the car would react and dip as the brakes were applied but then not slow very quickly due to the slide. I can also replicate the braking hessitation from high speed on the bench where locked wheels would be obvious.

I have a few things to try suggested by others so I'll let you know how I get on.

Cheers,

Nick
NTS is offline   Reply With Quote
Old 05-10-2011, 02:11 AM   #4965
Tech Master
 
Benzaah's Avatar
 
Join Date: Feb 2008
Location: Australia
Posts: 1,967
Trader Rating: 21 (96%+)
Default

Quote:
Originally Posted by NTS View Post
Benzaah,

Thank you for the thought and I know what you mean about locking wheels making the braking seem poor but that clearly isn't my current problem as the car doesn't slow at all when the brakes are first applied. If I was locking the wheels the car would react and dip as the brakes were applied but then not slow very quickly due to the slide. I can also replicate the braking hessitation from high speed on the bench where locked wheels would be obvious.

I have a few things to try suggested by others so I'll let you know how I get on.

Cheers,

Nick
I would try more initial brake as a solution as well. I would also never bench test from full throttle to full brake unless you want to grenade a motor.
__________________
AERCCC - ARCR - RRCSA

Adelaide RC

Walter Rc Hobby
Benzaah is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 3 (0 members and 3 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 10:25 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net

SEO by vBSEO 3.5.0