Model Boat Mayhem

The Shipyard ( Dry Dock ): Builds & Questions => Lifeboats => Topic started by: ferny on May 21, 2016, 04:19:59 pm

Title: 1/20 Severn Class
Post by: ferny on May 21, 2016, 04:19:59 pm: Hi

This is my first boat build so go easy! :-)

The inlaws gave me the RNLI branded Severn Class for Christmas(with a bit of direction) I was aware of the short falls so I got to work straight away. At first I tried the set up in the picture below using 2 ESC , V tail mixer and 2.4Ghz Rx. Completely useless! The brake function on the ESC made the steering hit and miss!

(http://i264.photobucket.com/albums/ii196/ferny-26/IMG-20160111-WA0002_zpsqbaez4j4.jpeg) (http://s264.photobucket.com/user/ferny-26/media/IMG-20160111-WA0002_zpsqbaez4j4.jpeg.html)

So after much head scratching and internet searching I settled for this,

(http://i264.photobucket.com/albums/ii196/ferny-26/Mobile%20Uploads/IMG-20160310-WA0010_zpsdun9k8x9.jpeg) (http://s264.photobucket.com/user/ferny-26/media/Mobile%20Uploads/IMG-20160310-WA0010_zpsdun9k8x9.jpeg.html)

Not true to scale but works well, the battery goes in the modified original battery compartment. I have used an Mtroniks viper 10 amp ESC, M400 motor driving a 30mm 3 blade nylon prop , FlySky tx, cooling jacket is home made (and works!) Rudder is a small brass one with a .5kg servo all mounted on some 3mm ply.

Once the propulsion was done I repainted the whole model using a mixture of Halfords rattle cans and humbrol enamels applied with my air brush.Also cut a hole in the deck to allow some access when it is screwed on.

(http://i264.photobucket.com/albums/ii196/ferny-26/Mobile%20Uploads/IMG-20160304-WA0008_zps6qwx7fnp.jpeg) (http://s264.photobucket.com/user/ferny-26/media/Mobile%20Uploads/IMG-20160304-WA0008_zps6qwx7fnp.jpeg.html)

(http://i264.photobucket.com/albums/ii196/ferny-26/IMG-20160211-WA0002_zps4fji9yub.jpeg) (http://s264.photobucket.com/user/ferny-26/media/IMG-20160211-WA0002_zps4fji9yub.jpeg.html)

She wears the markings of the Torbay life boat which are all from model flags.

Then I got a bit carried away and fitted some lights, which will be switched in the future.

(http://i264.photobucket.com/albums/ii196/ferny-26/IMG-20160318-WA0011_zpsy8kbknq5.jpeg) (http://s264.photobucket.com/user/ferny-26/media/IMG-20160318-WA0011_zpsy8kbknq5.jpeg.html)

And here she is dead in the water at Clacton after the first cheap ebay 380 motor over sped burnt out after 5 mins!

(http://i264.photobucket.com/albums/ii196/ferny-26/IMG-20160306-WA0000_zpsgb7qkze3_edit_1463843501646_zpsdqiv89oq.jpeg) (http://s264.photobucket.com/user/ferny-26/media/IMG-20160306-WA0000_zpsgb7qkze3_edit_1463843501646_zpsdqiv89oq.jpeg.html)

She seems to be fairly stable in the water, turns well, quick enough all though may try 3 s and above all she didn't sink! The first time I took her to Maldon a stock one was there and lads parents could not believe the difference, and asked loads of questions!

Thanks for looking

Jon
Title: Re: 1/20 Severn Class
Post by: Big Ada on May 21, 2016, 06:42:09 pm: Hi Jon and welcome to the forum.

Len.
Title: Re: 1/20 Severn Class
Post by: Martin (Admin) on May 21, 2016, 06:47:02 pm: Nice job! O0
Title: Re: 1/20 Severn Class
Post by: nivapilot on May 21, 2016, 09:05:50 pm: I have one of those awaiting my attention and rebuild..
Title: Re: 1/20 Severn Class
Post by: craggle on May 23, 2016, 12:03:08 pm: Looks good :-))
I have often been tempted to get one as a quick build while my 1/12th scale version is under build.

Whoever did the artwork for the box got it a bit wrong though as a 1:20th Severn lifeboat should be 850mm long as it's a 17 metre boat. I reckon the model you have is closer to 1/35 scale.

There is a couple of chaps here converting the Airfix 1/72 model kit to radio control. Now that is a small model!

Craig.
Title: Re: 1/20 Severn Class
Post by: jarvo on May 23, 2016, 04:23:03 pm: Mine is having twin motors and rudders, fitting at the moment

Mark
Title: Re: 1/20 Severn Class
Post by: ferny on May 23, 2016, 05:50:26 pm: Thanks for the good feedback, I quess I should chance the name of the thread lol
Title: Re: 1/20 Severn Class
Post by: jarvo on May 23, 2016, 06:30:58 pm: They are marked as 1/20th scale, which is also wrong as the hull shape was altered at the stern.

Don't worry, we all know what the boat is about, it was designed as a toy, we make t better

Mark
Title: Re: 1/20 Severn Class
Post by: ferny on May 12, 2019, 06:20:05 pm: So, my Severn class has been gathering dust in the garage for a while now rotting away, I decided a while ago I wanted to build another one with twin props and rudders. After hunting around on Ebay and gumtree I found one with broken motors very cheap !

(http://https://photos.app.goo.gl/EX9Sf5SStfwgCBQ76)
https://photos.app.goo.gl/EX9Sf5SStfwgCBQ76

Made a start on it this week.
Title: Re: 1/20 Severn Class
Post by: ferny on May 12, 2019, 10:12:15 pm: Props mounted , had a little accident removing some of the insides !

https://photos.app.goo.gl/GQ2SM3yokYsZeHsXA
Title: Re: 1/20 Severn Class
Post by: ferny on May 19, 2019, 10:41:06 pm: Motors and steering gear all done. Quick test in the bath and all worked as it should.

(https://www.modelboatmayhemimages.co.uk/images/2019/05/19/IMG-20190518-WA0003.jpg)
Title: Re: 1/20 Severn Class
Post by: ferny on May 22, 2019, 06:50:46 pm: A few coats of humbrol 18 and she is very orange!

(https://www.modelboatmayhemimages.co.uk/images/2019/05/22/20190522_184237.jpg) (https://www.modelboatmayhemimages.co.uk/image/JAvJT)
Title: Re: 1/20 Severn Class
Post by: ferny on May 22, 2019, 09:43:58 pm: With a bit of artistic license and some odds and from the spares box, have made the stern a bit more interesting, not perfect I know but should look ok from the shore , if you squint !

(https://www.modelboatmayhemimages.co.uk/images/2019/05/22/20190522_212906.jpg)
Title: Re: 1/20 Severn Class
Post by: ferny on May 23, 2019, 08:02:07 pm: The Severn re boot is coming on nicely, sticking to what I know and can do , ie airbrushing, humbrol 18 enamel and mr color leveling thinners.

Windows are as per the original as these were the main thing wrong with the finish of the first attempt

(https://www.modelboatmayhemimages.co.uk/images/2019/05/23/IMG-20190523-WA0016.jpg)
Title: Re: 1/20 Severn Class
Post by: ferny on May 23, 2019, 08:49:19 pm: So all the new running gear, electrics inc lipo, weigh pretty much the same as the stock parts, which means I have enough spare to fit a bow thruster!
Title: Re: 1/20 Severn Class
Post by: ferny on May 24, 2019, 09:49:56 pm: Cabin is nearly done, going spruce up the y class to top it off

(https://www.modelboatmayhemimages.co.uk/images/2019/05/24/20190524_214408.jpg) (https://www.modelboatmayhemimages.co.uk/image/JAYbu)
Title: Re: 1/20 Severn Class
Post by: ferny on May 25, 2019, 09:52:37 pm: Built up the mast today mostly from the spares box, all the white styrene and aluminium is what I have added again not 100% accurate but will look from a few meters!

It breaks down in to 4 parts for storage /transportation

(https://www.modelboatmayhemimages.co.uk/images/2019/05/25/20190525_214337.jpg)
Title: Re: 1/20 Severn Class
Post by: ferny on May 26, 2019, 10:08:07 pm: So here is the mast after some paint, and chopping half an inch off it, after I realised it was to tall.

(https://www.modelboatmayhemimages.co.uk/images/2019/05/26/20190526_215417.jpg)
Title: Re: 1/20 Severn Class
Post by: ferny on August 26, 2019, 02:14:38 pm: Some more progress on my baby Severn reboot

https://www.modelboatmayhemimages.co.uk/images/2019/08/26/20190531_163218.jpg

https://www.modelboatmayhemimages.co.uk/images/2019/08/26/20190602_211103.jpg

https://www.modelboatmayhemimages.co.uk/images/2019/08/26/20190823_205905.jpg
Title: Re: 1/20 Severn Class
Post by: ferny on October 06, 2019, 07:54:23 am: Have been busy on the severn class lately. Have started to replaced all moulded plastic railings with some that are a bit less toy like.

(https://www.modelboatmayhemimages.co.uk/images/2019/10/06/20191005_202256.jpg)

(https://www.modelboatmayhemimages.co.uk/images/2019/10/06/20191004_123928.jpg)

(https://www.modelboatmayhemimages.co.uk/images/2019/10/06/20191002_201803.jpg)
Title: Re: 1/20 Severn Class
Post by: SailorGreg on October 06, 2019, 02:05:09 pm: Oh yes, those railings look SO much better. As you say, much less toy-like. Amazing how much difference a relatively small change can make. :-)) :-))

Greg
Title: Re: 1/20 Severn Class
Post by: ferny on October 07, 2019, 07:28:06 pm: Thanks !
Title: Re: 1/20 Severn Class
Post by: RST on October 17, 2019, 11:20:01 pm: I'm a newbie to mini-severn. Read up about everything. Think I have most things sorted apart from battery (Ni-Mh for me). Nice build blog to follow -I hacked mine a fair bit.
Title: Re: 1/20 Severn Class
Post by: ferny on January 29, 2020, 03:59:12 pm: All done not 100% accurate but a big improvement
(https://www.modelboatmayhemimages.co.uk/images/2020/01/29/FB_IMG_1580313450070.jpg)
Title: Re: 1/20 Severn Class
Post by: Canterbury Coxswain on January 29, 2020, 04:15:07 pm: Ferny,
That's a cracking little Severn and a vast improvement on the original. You should be proud of the finish and I can see a few folk following your lead!
Congrats.
Kim [Canterbury Coxswain] - my 'handle' photo is of me on the Newhaven Severn 17-21 on a volunteers' Educational Trainers' day.
Title: Re: 1/20 Severn Class
Post by: ferny on January 29, 2020, 06:19:47 pm: Thanks, I am chuffed with how she turned out !
Title: Re: 1/20 Severn Class
Post by: Aidank on March 24, 2020, 10:37:13 pm: Quote from: ferny on May 19, 2019, 10:41:06 pm
Motors and steering gear all done. Quick test in the bath and all worked as it should.

(https://www.modelboatmayhemimages.co.uk/images/2019/05/19/IMG-20190518-WA0003.jpg)

this looks fantastic! would love to know the spec of the Hardware your using? i have a very upset Son who's identical lifeboat has stopped working for some unknown reason! all the research seems to be brush less motors/esc's etc but it all seems too big for this hull? would love a source of knowledge of how best to kit out replacement parts
Title: Re: 1/20 Severn Class
Post by: ferny on March 25, 2020, 08:18:33 am: Thanks!

Here a list of what I used :
2 x MABUCHI RK-370SD-5028 DC 3.7V-11.1V motors
2 x motor mounts
2x radioactive 300mm propshafts (will need cutting down)
Rubber prop coupling
20mm LH prop
Mtroniks 10 amp viper ESC
1 micro servo
1.6mm brass wire for steering linkages
2 small approx 15mm rudders
You will also need to replace the stock transmitter and reciver to many options to list !
And it's all powered by 1000mah 2s lipo.
All available from ebay and most well stocked hobby shops
Title: Re: 1/20 Severn Class
Post by: Martin (Admin) on March 25, 2020, 08:28:35 am: Also, go back to the front page of thr Forum and do a search for baby severn
Title: Re: 1/20 Severn Class
Post by: Aidank on May 08, 2020, 02:39:04 pm: Quote from: ferny on March 25, 2020, 08:18:33 am

Here a list of what I used :
2 x MABUCHI RK-370SD-5028 DC 3.7V-11.1V motors
2 x motor mounts
2x radioactive 300mm propshafts (will need cutting down)
Rubber prop coupling
20mm LH prop
Mtroniks 10 amp viper ESC
1 micro servo
1.6mm brass wire for steering linkages
2 small approx 15mm rudders
You will also need to replace the stock transmitter and reciver to many options to list !
And it's all powered by 1000mah 2s lipo.
All available from ebay and most well stocked hobby shops

this looks fantastic! how does she perform? have you had her in the water yet?
Title: Re: 1/20 Severn Class
Post by: Aidank on May 08, 2020, 04:11:04 pm: any links would be great! keep finding props that dont suit shafts or shafts then no props! assume you used an m4 prop shaft? ive found 2mm but then cant find props, all m4 props seem too big?
Title: Re: 1/20 Severn Class
Post by: ferny on May 08, 2020, 06:25:53 pm: http://https://www.cornwallmodelboats.co.uk/cgi-bin/sh000001.pl?WD=prop%20lh%2025mm&PN=Graupner-3-Bladed-Propeller-LH-25mm-M2-G2307_25L%2ehtml#SID=333 (http://https://www.cornwallmodelboats.co.uk/cgi-bin/sh000001.pl?WD=prop%20lh%2025mm&PN=Graupner-3-Bladed-Propeller-LH-25mm-M2-G2307_25L%2ehtml#SID=333)

http://https://www.cornwallmodelboats.co.uk/cgi-bin/sh000001.pl?WD=prop%20rh%2025mm&PN=Graupner-3-Bladed-Propeller-RH-25mm-M2-G2307_25%2ehtml#SID=333 (http://https://www.cornwallmodelboats.co.uk/cgi-bin/sh000001.pl?WD=prop%20rh%2025mm&PN=Graupner-3-Bladed-Propeller-RH-25mm-M2-G2307_25%2ehtml#SID=333)
Title: Re: 1/20 Severn Class
Post by: Aidank on May 09, 2020, 06:21:27 am: https://www.amazon.co.uk/gp/product/B07MLFMZ7F/ref=ox_sc_act_title_1?smid=A38WCF64ZZVDKC&psc=1 (https://www.amazon.co.uk/gp/product/B07MLFMZ7F/ref=ox_sc_act_title_1?smid=A38WCF64ZZVDKC&psc=1)

found these which might be easier still! available in 250mm or 300mm so may try the 250mm
Title: Re: 1/20 Severn Class
Post by: Aidank on May 10, 2020, 04:25:01 pm: Assume even though you used two ESC's they were both powered from a single battery or do they need one each? newby apologies!
Title: Re: 1/20 Severn Class
Post by: ferny on May 10, 2020, 05:09:33 pm: Only used the 1 esc to keep the weight down.
Title: Re: 1/20 Severn Class
Post by: Aidank on May 12, 2020, 04:03:00 pm: Ah ok! i see your motors are wired together now! id love full function on both but you may have the right idea with saving weight!