Hong Kong RC Sailplane Forum 香港滑翔機發燒友論壇

This forum is dedicated to r/c sailplane enthusiasts 此論壇專為遙控滑翔機發燒友而設
It is currently 25 Nov 2017 07:33 pm

All times are UTC + 8 hours




Post new topic Reply to topic  [ 140 posts ]  Go to page Previous  1, 2, 3, 4, 5, 6, 7  Next
Author Message
PostPosted: 23 Nov 2012 09:59 am 
User avatar

Joined: 26 Feb 2004 07:54 pm
Posts: 1660
Location: Tai Po, HK
Albert,
唔止新人要學, 我呢啲舊人都極之需要從新培訓 :lol:

大埔沙羅洞我以前飛過 DLG,
個場唔夠大玩比賽, 但幾個人玩係OK嘅.
好處係免申請、又唔駛坐船過海 :D

沙羅洞難題係草長, 可供出機嘅位置少.
但上咗天之後,好好熱氣流.


Top
 Profile  
 
PostPosted: 23 Nov 2012 10:55 am 
User avatar

Joined: 13 Jul 2009 07:13 am
Posts: 783
K.Y.Mak wrote:
Albert,
唔止新人要學, 我呢啲舊人都極之需要從新培訓 :lol:

大埔沙羅洞我以前飛過 DLG,
個場唔夠大玩比賽, 但幾個人玩係OK嘅.
好處係免申請、又唔駛坐船過海 :D

沙羅洞難題係草長, 可供出機嘅位置少.
但上咗天之後,好好熱氣流.

咁你要搵日吹鷄喇 !!
但冇車點去???


Top
 Profile  
 
PostPosted: 23 Nov 2012 10:56 am 

Joined: 02 Aug 2004 10:14 am
Posts: 621
慣常啓德星期日, "晨早"至8:30am (清場), 粗粗地飛一個鐘, 你又肯唔肯呀?

事在人為啫.


Top
 Profile  
 
PostPosted: 23 Nov 2012 11:20 am 
User avatar

Joined: 26 Feb 2004 05:08 pm
Posts: 2941
Location: Hong Kong
帶定架DLG去玩F3F,無風丫嗱,我玩DLG,吹咩!! :twisted:

雖然無係平地玩咁好,但最少可以練下掟機,OK嘅。

(可能個天見你兩手準備,OK,咁落雨囉! :lol:


Top
 Profile  
 
PostPosted: 23 Nov 2012 12:36 pm 
User avatar

Joined: 05 Jan 2005 12:49 am
Posts: 814
CM Cheng wrote:
帶定架DLG去玩F3F,無風丫嗱,我玩DLG,吹咩!! :twisted:

雖然無係平地玩咁好,但最少可以練下掟機,OK嘅。

(可能個天見你兩手準備,OK,咁落雨囉! :lol:


我舊時見過堅叔係大清玩 Longshot. 真係技驚四座! :o

晨早去啟德玩一個鐘 DLG... 首先石屎地好傷機,二來並不是有效吸引新人參與既方法。

大埔沙羅洞係邊? 可以一試,點都好過南生圍吧?


Top
 Profile  
 
PostPosted: 23 Nov 2012 12:56 pm 

Joined: 02 Aug 2004 10:14 am
Posts: 621
石屎地好傷機?

老細, 草地果边喎. 市區地方是為咗相就大家, 撻得着先啦!

最直接就不如跟Thomas南生圍早場啦, 橫掂都喺"馬大夫"的病人 :D


Top
 Profile  
 
PostPosted: 23 Nov 2012 01:18 pm 
User avatar

Joined: 05 Jan 2005 12:49 am
Posts: 814
8:30am 前去飛一個鐘,想撻著都幾難。。。

識幾位機友都買左 DLG, 只飛過一次 或 甚至砌好未飛過!


Top
 Profile  
 
PostPosted: 23 Nov 2012 04:35 pm 
User avatar

Joined: 26 Feb 2004 07:54 pm
Posts: 1660
Location: Tai Po, HK
去沙羅洞, 可由丁角路去
過了鳳園有一小路上山直達
有幾個車位. 落車後行分鍾OK :D

http://goo.gl/maps/nR2oS


Top
 Profile  
 
PostPosted: 23 Nov 2012 04:46 pm 
User avatar

Joined: 26 Feb 2004 07:54 pm
Posts: 1660
Location: Tai Po, HK
Kolosun wrote:
但冇車點去???


先去"鳳園蝴蝶保育區" :
http://blog.yahoo.com/_TQ5GITFSH43SRSHC ... les/270516

山邊有小徑可行上沙羅洞. 或於無風日子,鳳園村口 call我一齊上 :mrgreen:


Top
 Profile  
 
PostPosted: 23 Nov 2012 08:03 pm 
User avatar

Joined: 20 Apr 2011 10:02 am
Posts: 355
Location: Vancouver/Yuen Long
Wow, lot's of activity in the Thermal forum this past week! This is awesome :D

Yes, let's plan a fun meet and I'll try to help 'coach' some DLG specific things, such as launch, flight modes, presets, etc.
I cannot see a grass area on google maps? Do you have any photos Mak?

Nam Sang Wai is not very suitable, way too many people on weekends. What about that field in Sai Kung you guys mentioned last time?

Sunday is best for me, but please let me know in advance so I do not schedule any events or activities in SCSA, hehe :)


Top
 Profile  
 
PostPosted: 24 Nov 2012 06:24 pm 
User avatar

Joined: 26 Feb 2004 03:51 pm
Posts: 3624
Location: Hong Kong
K.Y.Mak wrote:
去沙羅洞, 可由丁角路去
過了鳳園有一小路上山直達
有幾個車位. 落車後行分鍾OK :D

http://goo.gl/maps/nR2oS


阿麥,沙羅洞上面還有幾戶村民居住,有些荒棄的田地最近被開發成有機種植。對出行遠少少有塊較大的草地,草很高,可能是濕地,附近有些祖墳,如果去個度飛,需要跟村民單聲,也要大力整治塊草地至得 :cry:


Top
 Profile  
 
PostPosted: 25 Nov 2012 08:31 pm 

Joined: 09 Sep 2004 04:57 pm
Posts: 688
So bad ! 9/Dec is our f3f last contest . i must go F3F . so i con't go Human , so bad !! :twisted:


Top
 Profile  
 
PostPosted: 26 Nov 2012 07:42 am 
User avatar

Joined: 20 Apr 2011 10:02 am
Posts: 355
Location: Vancouver/Yuen Long
Kin, what is your email? I need to send you some photos


Top
 Profile  
 
PostPosted: 02 Dec 2012 01:09 am 

Joined: 09 Sep 2004 04:57 pm
Posts: 688
ThomasLee wrote:
Kin, what is your email? I need to send you some photos

wankin007@yahoo.com.hk
i really waiting your good quality photo !


Top
 Profile  
 
PostPosted: 23 Jan 2013 01:14 am 
User avatar

Joined: 26 Feb 2004 03:51 pm
Posts: 3624
Location: Hong Kong
ThomasLee wrote:
You can see in the photo my 750mah 1s lipos. I don't have their dimensions, if you want I will measure it when I get home. I bought them from Hobbyking for ~$2.5USD each shipped to Vancouver.

Now I bought some round cell (14500 type) 1200mah 3.7v batteries to use, they should help me eliminate most noseweight (I use carbon tails, so they are 2 grams heavier than glass tails).

Image
these are ~4RMB from Taobao



Hi there,

I am building my Akcent 2 DLG now. I am going to use WAYPOINT W-038CL servos for crosstail and Hyperion DS09 servos for the wing.
I bought an 880mAH 1s 3.7V and when I tested it with my JR RC813B reciever, the telemetry said the reciever has 3.7V, the blue LED lighted but the servos are not moving. Look like that the 1s LiPo voltage of 3.7V is insufficient for this receiver, isn't it? I checked the spec of the receiver, the operating voltage is between 4.0v to 8.5V.
Really want to know how your installation can work with 1s Lipo! :roll: :roll:


Attachments:
Akcent2_1.jpg
Akcent2_1.jpg [ 38.26 KiB | Viewed 5206 times ]
UltraFire_880mAh.jpg
UltraFire_880mAh.jpg [ 25.31 KiB | Viewed 5206 times ]
Top
 Profile  
 
PostPosted: 23 Jan 2013 08:19 am 
User avatar

Joined: 20 Apr 2011 10:02 am
Posts: 355
Location: Vancouver/Yuen Long
Hi Stanley,

I am using 1s on my RG631B and RG831B receivers on all my planes. Nearly all servos should work on 1s (maybe only slightly slower or less torque, but should not be noticeable in flight), so it may be a connection problem between the servo and RX. Have you tried the servos on other RX's?

The Hyperion is the same servo as what I use (just different badge), so I know first hand it works very well on 1s, I am not familiar with the WAYPOINT's so I cannot confirm that they are no problem on 1s, but chances are they are compatible and it is another issue why the servos are not moving.

Nice looking plane ;)

Thomas


Top
 Profile  
 
PostPosted: 23 Jan 2013 11:58 am 
User avatar

Joined: 26 Feb 2004 03:51 pm
Posts: 3624
Location: Hong Kong
That's strange!
When I turned on my RG831B receiver with 1s 3.7V, the blue lights were on for about 5 seconds. During this period all servos were functioning. Afterward, it stopped working with light off. The battery was fully charged and the telemetry reading in Tx was still a 3.7V.

I tried it with a 4.8V MiNH pack, no problem at all. So I just wonder, can the receiver really work with 3.7V? The spec indicates a minimum 4.0V required.

I am still waiting for a 6 channel RG631B receiver from Ah Kin, so I have no chance to test other receivers yet :oops: :oops:


Top
 Profile  
 
PostPosted: 23 Jan 2013 01:58 pm 

Joined: 02 Aug 2004 10:14 am
Posts: 621
Hi Stanley, Have you ever discharged the Ultrafire on the charger? See what capacity and V drop under load?
Or you may verify the functioning under 3 cells Nimh (home wireless phone or walkie talkie battery).

Johnson


Top
 Profile  
 
PostPosted: 23 Jan 2013 02:45 pm 
User avatar

Joined: 26 Feb 2004 03:51 pm
Posts: 3624
Location: Hong Kong
I know the battery is ok because I also tested it in my LED torch and has been gone through a charge/discharge cycle. I also has a 1s Lipo of different brand, 650mAh fully charged, but the result is the same. I will test it again with a 3 cell NiMH tonight. :?:


Top
 Profile  
 
PostPosted: 23 Jan 2013 04:04 pm 
User avatar

Joined: 20 Apr 2011 10:02 am
Posts: 355
Location: Vancouver/Yuen Long
That's interesting, I've tested my receivers down to 3.6V with no problem, but I set my alarm to 3.7v to be safe. What is the voltage of your cell fully charged? My 1s lipo's are about ~4.2V fully charged, and on a 750mah 1s I can get about 3 hours of usage before it hits 3.7V.

The RG631B and RG831B receivers are thoroughly tested to be 1s compatible so you can rule that out, I would presume it is something to do with the quality of the 1s lipo as well. I'm using Turnigy Nano-tech batteries right now form Hobby King and they're very good. I'm down to my last few though, so I bought some Ultrafire 1200mah's to try, I have tested them to hold about 11XX mah, but have not testing them on my RX yet.

Thomas


Top
 Profile  
 
PostPosted: 23 Jan 2013 09:51 pm 
User avatar

Joined: 26 Feb 2004 07:54 pm
Posts: 1660
Location: Tai Po, HK
Stanley,
Why use UltraFire?
This beautiful plane deserve a better battery !

(LED lights can work right down to 2.8 volt, but receivers require higher voltage)


Top
 Profile  
 
PostPosted: 24 Jan 2013 01:00 am 
User avatar

Joined: 26 Feb 2004 03:51 pm
Posts: 3624
Location: Hong Kong
I just found out the problem! It is my battery connector which has a bad contact. :oops: :oops:

Now I can use UltraFire 880mAH, no problem. Even the voltage dropped to 3.5V is still ok.
I also brought a Nitecore 650mAH which is more expensive than UltraFire, and it also works fine.

I fully charged this battery to 4.2V and when it was connected to the receiver, the telemetry indicated a 3.8V. So I think I will set the low voltage alarm at 3.4V to be safe.

By the way, what kind of control linkage system you guys used in rudder/elevator, metal push rod or push/pull string?
I guess metal push rod is more heavy :? :?


Attachments:
Nitecore_650mAh.jpg
Nitecore_650mAh.jpg [ 58.9 KiB | Viewed 5146 times ]
Top
 Profile  
 
PostPosted: 24 Jan 2013 10:18 pm 
User avatar

Joined: 26 Feb 2004 07:54 pm
Posts: 1660
Location: Tai Po, HK
many pilots are using pull spring nowadays :o


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 140 posts ]  Go to page Previous  1, 2, 3, 4, 5, 6, 7  Next

All times are UTC + 8 hours


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron

RCSAIL Home

WindGURU at Ma On Shan, Clearwater Bay and Fei Ngo Shan

Powered by phpBB® Forum Software © phpBB Group