Model Boat Mayhem

The Shipyard ( Dry Dock ): Builds & Questions => Submarines => Topic started by: thegrimreaper on May 29, 2011, 04:47:24 pm

Title: Akula @ Hoylake
Post by: thegrimreaper on May 29, 2011, 04:47:24 pm
My AKULA at Hoylake after the pool being cleaned

http://www.youtube.com/watch?v=mW8Ycn-g9S8

hope you like

Regards Mark
Title: Re: Akula @ Hoylake
Post by: trevor v on May 29, 2011, 05:01:22 pm
good video  :-)) can you tell me what camera you used and ware hoylake is.
Title: Re: Akula @ Hoylake
Post by: thegrimreaper on May 29, 2011, 05:05:41 pm
Hoylake my friend is over on the Wirral between Chester and Liverpool

the camera is a keyfob camera 808 from flea bay in a home brew waterproof housing

link to flea bay http://cgi.ebay.co.uk/2010-16GB-Mini-Key-Fob-Hidden-Camera-DVR-No-Spy-use-/220692281943?pt=UK_CCTV&hash=item336248fa57#ht_2267wt_1139

Regards Mark
Title: Re: Akula @ Hoylake
Post by: The long Build on May 29, 2011, 05:28:16 pm
Shame there were no other subs, that would have looked pretty good, Did you not find any targets, Sorry other vessels to approach, considering it was underwater the picture quality was very good and picked up the sound as well, Might just get one of them..
Title: Re: Akula @ Hoylake
Post by: Subculture on May 29, 2011, 05:30:08 pm
Recommend the HD 808 keyfob camera for a few more groats- http://cgi.ebay.com/Mini-HD-DV-key-chain-Camera-Recorder-DVR-Video-1280x720_W0QQitemZ160546966106QQcategoryZ48634QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Much wider field of view and true 720P video.
Title: Re: Akula @ Hoylake
Post by: Subculture on May 29, 2011, 06:11:48 pm
In addition, anything larger than a 4GB micro SD card is a bit pointless with these cameras unless you upgrade the on board battery.

A 4GB card will give you about and hour or so of video, and that is as long as the little built in lipo battery lasts.

Andy
Title: Re: Akula @ Hoylake
Post by: thegrimreaper on May 29, 2011, 08:27:13 pm
yeh but if you take a laptop with you they are rechargable  from that and video quality is ok for the internet dont think any posh buggers on here with HD monitors ha ha ha
Title: Re: Akula @ Hoylake
Post by: Subculture on May 29, 2011, 08:30:44 pm
Most computer screens are HD. Agreed you can recharge them from a laptop, or a car cigarette lighter socket with a suitable adapter.

Nice pond, very clear- is it filtered?
Title: Re: Akula @ Hoylake
Post by: thegrimreaper on May 29, 2011, 08:36:53 pm
not filtered just been drained by the RNLI fire brigade and Hoylake/New Brighton boat clubs

another video here showing what is possible with a bog standard non HD 808 key fob camera a normal video camera and software no where near perfect still learning to use the software but hey thanks for looking

http://www.youtube.com/watch?v=xt9FbE-pXfk

Regards Mark
Title: Re: Akula @ Hoylake
Post by: The long Build on May 29, 2011, 09:19:44 pm
What did you use to give the clear shot through the WTC, Glass or Perspex ?.
Title: Re: Akula @ Hoylake
Post by: thegrimreaper on May 29, 2011, 09:26:59 pm
you would not believe it is a piece of shelving from a shop shelf cut to shape I am in a position to get rather a lot of this perspex at time in sizes of 1ft square

another video with PiP this time without the black border all the way around

enjoy

http://www.youtube.com/watch?v=861mfnjW2LQ

regards Mark
Title: Re: Akula @ Hoylake
Post by: Subculture on May 30, 2011, 03:09:45 pm
Looks like you have a Version #8 808 camera. There are currently about 12 different versions, and they all look alike, but perform rather differently.

Lots of information here- http://www.chucklohr.com/808 including how to differentiate between the versions and lots of mods and tricks.

I use Version #3 SD 808 and Version #11 HD 808. One of the great things about these versions is you can turn off the time and date with a firmware update.
Title: Re: Akula @ Hoylake
Post by: Mankster on May 30, 2011, 04:14:25 pm
Mines 720p 808's arrived, but I dont have a micro SD card to test it out  {:-{
Title: Re: Akula @ Hoylake
Post by: TugCowboy on May 30, 2011, 04:44:59 pm
Mines 720p 808's arrived, but I dont have a micro SD card to test it out  {:-{

Tesco currently have the 8gb on offer for about £8.99 .... or it might have been ASDA, definately one of them anyway as I saw it last Friday.

Alex
Title: Re: Akula @ Hoylake
Post by: Subculture on May 30, 2011, 06:50:02 pm
Mines 720p 808's arrived, but I dont have a micro SD card to test it out  {:-{


Class 4 or higher needed for HD. Your mobile might have one in. Needs to be formatted for FAT32.
Title: Re: Akula @ Hoylake
Post by: Mankster on May 30, 2011, 07:20:44 pm
Thanks, bought a 4gb class 4 card off eBay for around £4. My phone has a 8 gb card but I dont want to stick it in just incase it wipes the card. Will just have to wait a few more days to try it out.
Title: Re: Akula @ Hoylake
Post by: Subculture on May 30, 2011, 08:14:52 pm
It won't wipe it- I've done this before. The camera just writes a couple of extra folders in the home directory.
Title: Re: Akula @ Hoylake
Post by: thegrimreaper on June 05, 2011, 02:14:25 pm
copy everything off the 8gig card in your phone onto the 4 gig one put 4 gig one into the phone you might have to be a bit mercenary in deleting a bit of stuff if there is too much on the 8 gig to fit the 4 gig but hey you know how to do this you are the Mankster

Regards Mark
Title: Re: Akula @ Hoylake
Post by: g4yvm on June 06, 2011, 11:30:46 am
Interesting camera heads-up, thanks.

Whats in the big bulb at the rear of the Akula? (in real life!).  Looks like theres a hole there, does it trail a sensor?

D
Title: Re: Akula @ Hoylake
Post by: Subculture on June 06, 2011, 11:57:51 am
Towed array sonar.
Title: Re: Akula @ Hoylake
Post by: Gra on June 08, 2011, 06:02:52 am
Hi Mark,

Can i ask what ESC you are using in your Akula.
I am running a Sheerline Akula with an M/Troniks Sub 10 ESC.
The ESC keeps cutting out in forward speed,if i hit reverse forward speed returns  for a few seconds then i have to repeat procedure.

Graham
Title: Re: Akula @ Hoylake
Post by: thegrimreaper on June 08, 2011, 09:51:14 am
Mtronik Viper 20 Marine
Viper Marine20
Forwards & Reverse Marine ESC
The series consists of forwards only, reversible & marine spec controllers handling every job you can expect from the latest state of the art technology.
* NEW built in failsafe to protect against complete loss of signal or when out of range (compatible with all manufacturers receivers)**INDUSTRY FIRST**
* ABSOLUTE short circuit and motor overload protection * 20A current limit
* 100% Waterproof
* 6-12Volts input voltage

hope this helps gra

Regards Mark
Title: Re: Akula @ Hoylake
Post by: thegrimreaper on June 09, 2011, 08:36:15 am
Just read their Gra it looks like your using a 10 amper which I dont think is big enough I think the motor draws more than 10 amps in the water that might be your problem you are hitting the thermal or current overload area of the esc

Regards Mark
Title: Re: Akula @ Hoylake
Post by: Gra on June 09, 2011, 10:14:28 am
Hi Mark,

No the esc has a 40amp limit.
Built specifically for submarines  by Mtronics.
My SUB 10 was sold by Mtronics before the Viper range came on the market.
Have a look at Mtronics site under other ESC.

Gra
Title: Re: Akula @ Hoylake
Post by: thegrimreaper on June 09, 2011, 10:52:11 am
"Bugga" thought I might of hit on the problem then Gra don't know what else to suggest unless your radio has programable travel on the sticks. Or I don't know how you set the travel on that ESC you have, on the one I use I press a button on the unit then stick full forward then full reverse that sets the travel on the unit could it be that ? only other thing I can think of is a fault in the wiring (loose) or the esc has developed an internal problem.

Regards Mark
Title: Re: Akula @ Hoylake
Post by: Gra on June 09, 2011, 11:02:57 am
Hi Mark,

Setup procedure is the same as your ESC.
Looks like i will have to look at the internals.
Thanks for your feedback.

Gra
Title: Re: Akula @ Hoylake
Post by: Davy1 on June 09, 2011, 12:31:46 pm
Hi Gra,

Do you get this problem on the bench or only on the water?

- If on the bench, you may be overloading the BEC.(Try unplugging some servos)
-If on the water, it may be a radio related problem.(Try some aerial unbundling etc.)

David
Title: Re: Akula @ Hoylake
Post by: thegrimreaper on June 09, 2011, 02:04:56 pm
HHmmm overloading the BEC nice one david never thought of that one but I might be wrong on this wouldn't radio interferance manifest itself as possible juddering of all other servos,?  I only say that because my U47 developed an interferance problem where by all the servos would judder like made I traced the fault to a bad connection on the battery. Electricery good when it's workin'  O0  bugga' when its not  <*< <*<
Title: Re: Akula @ Hoylake
Post by: Gra on June 10, 2011, 10:48:14 am
Hi Mark and David,

Problem on the water, i am going to have another go this coming Sunday.Will let you no outcome.
Have taken your suggestions on board.

Gra
Title: Re: Akula @ Hoylake
Post by: thegrimreaper on June 10, 2011, 02:44:40 pm
Could I also suggest checking the truness of the prop shaft and play in the shaft if the shaft is bent that could cause it to binde and draw more current same as if their is no end float between the shaft and outter tube maybe to heavy a grease being used in the shafts
worn commutator or brushes in the motor.

Regards Mark
Title: Re: Akula @ Hoylake
Post by: sheerline on June 11, 2011, 10:55:44 pm
Gra.
Your problem with your boat appears to be linked to the B.E.C which controls the voltage to your rx. I have seen and experienced this problem before and it may be due to the B.E.C overheating. The main cause of the problem was due to this externally mounted  component becoming detached from the aluminium body (heatsink) of the speed controller. It was usually glued to the side but heat caused it to detach in some cases. Take a look at the thing, if it has detached then it may get too hot and start cutting out or causing your symptoms.
 You can try sticking it back on but I would recommend you find a lightweight piece of aluminium sheet approximately a couple of inches square, drill a hole in it and bolt the B.E.C to it. Mount it anywhere convenient, you can fix it down to the servo tray with a tiewrap if necessary but it will serve as a good heat sink and hopefully your problem will disappear.

Regards.
Chris   
Title: Re: Akula @ Hoylake
Post by: Gra on June 15, 2011, 07:39:03 am
Hi Mark and Chris,

Ran boat on Sunday and it ran okay,no sign of trouble.
Only thing i did was give the negative connection a good clean.Will try again next Sunday.
Chris,
We have discussed this problem way back in 2009 and before.Bec on ESC was isolated after these discussions.
At the same time you did supply an updated positive terminal and lead which i did fit.
Anyway will take all info on board and have a look for any loose connrctions etc.
Photo of my modified AKULA attached.

Gra
(http://s2.postimage.org/1br13ihw/DSCF1415.jpg) (http://postimage.org/image/1br13ihw/)
Title: Re: Akula @ Hoylake
Post by: sheerline on June 15, 2011, 02:22:22 pm
Hi Gra.
I have had this discussion with a few people over the years as it crops up once in a while, the old grey cells won't fire on all cylinders at times so individual cases are hard to remember.

The only other cause which springs to mind is that of the aerial. I'm not sure how or where yours is positioned but if inside the dive unit just make sure it's not bundled around the motor. I usually wrap the surplus wire around two fingers and strap it down somewhere on the aft servo tray using a tie-wrap, I have to add that I leave a little surplus in the forward tank to just to maximise the length.

If it is taken out of the dive unit into the wetted area it is vital that water will not contact the conductor through the end of the wire insulation so make sure this is effectively sealed with a blob of silicone sealant. Also check there are no nicks in the insulation along it's length since the water will earth out the aerial thus reducing range and causing glitching. Glitching also increases current drain quite dramatically and since the servos rely on the BEC to supply them, the temperature of the BEC goes up causing it to cut out at high temperature or maybe simply 'play up' as it gets hotter.

You're probably aware of all of the above but just thought it worth mentioning.
Regards.
Chris
Title: Re: Akula @ Hoylake
Post by: sheerline on June 15, 2011, 02:25:54 pm
Oh, just one more thing.....my compliments to you on a really nicely turned out Akula, your extra detailing has really set the whole thing off.
Very nicely done that man! :-))
Title: Re: Akula @ Hoylake
Post by: Gra on June 16, 2011, 10:07:00 am
Hi Chris,
Thanks for the follow up,the old grey cells are kicking in here also.
Will follow up with all suggestions.
As a matter of interest i am still using the same battery purchased with Sub from you on 18/10/2004.
Not bad i would suggest.

Thanks Graham