Model Boat Mayhem

Mess Deck: General Section => Model Boating => Topic started by: Nige52 on July 08, 2009, 10:12:36 am

Title: Filling a nitro tank
Post by: Nige52 on July 08, 2009, 10:12:36 am

Hi,
I'm totally new to nitro and saw this little race boat for sale in a local shop, it came with no instructions whatsoever even though it's brand new. I have the fuel and the glow starter but am unsure how to fill the tank. All I can see is a small pipe with a screw fitted in the end, surely this thin little pipe needs to be connected to something? Any help gratefully received, thanks
Nige

(http://pic20.picturetrail.com/VOL1241/4157929/21465460/369018226.jpg)

Title: Re: Filling a nitro tank
Post by: gromarlie on July 08, 2009, 02:46:27 pm

That is the filler pipe  :-))
Take out the bung and pump in fuel  :embarrassed:

Title: Re: Filling a nitro tank
Post by: Nige52 on July 08, 2009, 03:06:03 pm

Ah,
So I need a pump too? I wish they in the shop would mention the extra's I needed at the point of sale.  %)

So if I buy a pump, probably from ebay, will I need anything else too?
Thanks
Nige

Title: Re: Filling a nitro tank
Post by: Martin (Admin) on July 08, 2009, 04:19:58 pm

Probably a couple of spare glow plugs, "Glow Panel", fuel filters to keep everything nice and clean, starting stand, fishing line to retrieve stalled boat....

Have a look at my pages on glow engines:
http://www.modelboatmayhem.co.uk/Common/Glow%20engines/1C%20engines.htm
http://www.modelboatmayhem.co.uk/My_models/03%20laser.htm

(http://www.rcworld.co.uk/acatalog/L-IP155.gif)

(http://www.atsrcplanes.com/images/Handpump1.JPG)

http://www.rcworld.co.uk/acatalog/Fuel_Tubing_and_Accessories.html
http://www.barnstormersmodelsonline.co.uk/index.php?option=categories&category_id=186678
http://www.ripmax.com/7index.asp?category=080-050&selectedtab=080

Title: Re: Filling a nitro tank
Post by: andyn on July 08, 2009, 05:40:11 pm

That thing looks ok, can we have pics of the rest of the boat?

First thing to do is chuck away that pipe. Fit a manifold and tuned pipe, the standard can silencers are no use in boats. The put extra weight on the side of the engine, cause more vibration. They are also way too noisy. Why manufacturers always supply insufficiant silencers or straight through pipes is way beyond me.

Next thing is to take a photo of the throttle connection, it doesn't appear to go anywhere...

Title: Re: Filling a nitro tank
Post by: Nige52 on July 09, 2009, 10:36:17 am

I took the radio box out to re-glue it as one of the sides had come loose, hence the throttle linkage going nowhere lol
The boat is called Navigtor A3 and has a Vertex 18 marine engine. I've looked for a tuned pipe and manifold but can't seem to find one yet, any ideas?
Here are a couple of photos, the boat is 32" long

(http://pic20.picturetrail.com/VOL1241/4157929/21465460/369107613.jpg)

(http://pic20.picturetrail.com/VOL1241/4157929/21465460/369107612.jpg)

Nige :-)

Title: Re: Filling a nitro tank
Post by: omra85 on July 09, 2009, 11:39:25 am

Interesting looking boat Nige, should be fun.
If you're not doing quick refills, you could always use a 'squeezy' bottle (washing up liquid bottle) with a bit of silicone tube and metal tube to connect to the tank filler and 'pump' the fuel in with that.
A Power panel will not be much use unless you also want to lug a 12V battery as well (you don't need the pump or starter connections so its a bit overkill for just a 2V supply).
With it being a small pull start engine, you may prefer to use a model car type "all in one" glow plug driver. Get one with a high capacity battery, as using a pull start might involve it being connected longer ....

Cheers
Danny
 
PS. Don't forget to add some bouyancy inside your lid, then if it comes off it won't sink.

Title: Re: Filling a nitro tank
Post by: andyn on July 09, 2009, 12:27:28 pm

I'll get back to you on the pipe and manifold, I'll see what I can do.

Otherwise this is what you want:
http://www.novarossi.it/eng/products/tuned-pipes/show.php?brand=nova&cat_name=NOVA%20on-road

The top one should do you well.

Title: Re: Filling a nitro tank
Post by: Nige52 on July 09, 2009, 01:38:50 pm

I bought a glow igniter when I bought the boat as I don't fancy lugging a battery about  :-)

It appears that this Vertex 18 is a 3cc, 2.1bhp engine? So what class would it be in? I never realised that the tuned pipes were the ones the cars use, I imagined they would be the long chrome silencer type that stretch back over the boat. I have found a manifold on ebay that the guy says will fit the Vertex LINK HERE (http://cgi.ebay.co.uk/Alumium-exhaust-manifold-for-18-engine-rc-boat-car_W0QQitemZ300202603105QQcmdZViewItemQQptZRadio_Control_Parts_Accessories?hash=item45e5783261&_trksid=p4634.c0.m14.l1262&_trkparms=|293%3A2|294%3A30)
Would this be ok?
Thanks again,
Nige

Title: Re: Filling a nitro tank
Post by: andyn on July 09, 2009, 02:59:43 pm

It would be in AA class, and I suggested that pipe because they are cheap. We do use the pipe you descibed, but any tuned pipe will be fine so long as it is the right legnth. Here is a photo of a boat pipe, a car one would do your engine fine given the amount of space in the hull etc.

(http://www.prestwich.ndirect.co.uk/images/indexpipe.jpg)

Title: Re: Filling a nitro tank
Post by: omra85 on July 09, 2009, 04:32:29 pm

Nige - that manifold, whilst looking neat, will be pretty awful. It does the same as a standard aircraft silencer in that it "turns" the exhaust gasses at a sharp 90 degrees (you want the flow to be as smooth as possible for speed).
Have a look at Just engines
http://www.justengines.unseen.org/acatalog/Manifolds___Accessories.html (http://www.justengines.unseen.org/acatalog/Manifolds___Accessories.html)
they have the swept manifolds and also long purple pipes  :o - but as Andy says, a car one will do the same job, is easier to place in the hull, and will be reasonably quiet.  Many of the 'Z' class racers use them.
Cheers
Danny

Title: Re: Filling a nitro tank
Post by: andyn on July 09, 2009, 05:09:06 pm

I do like Just Engines, for aircraft their pipes are excellent, but unfortunately when used in a boat Genisis pipes are pretty hopeless.

They will make any manifold you want though. Very cheap and absolutely excellent service.

Title: Re: Filling a nitro tank
Post by: Nige52 on July 09, 2009, 06:25:09 pm

Hmm, now I'm confused a little. I appreciate that the silencer already fitted is not much use and a change to a tuned pipe would help, but all I want is to have fun with the boat, it won't actually be raced against anything else so getting the utmost speed isn't a 'Must do' on my part, although I would like a quieter engine....... ok2

Title: Re: Filling a nitro tank
Post by: omra85 on July 09, 2009, 09:00:16 pm

Nige
Try what you've got, if you like it - fine  :-))
If you don't, or the 'silencer' falls off, then you can take heed of these words of advice in selecting what you do next  O0
You would be best with a Just Engines swept manifold going into a fast car type tuned pipe.  The Purple pipes are "flat plate" technology rather than "reversed cone" so are very "peaky" with optimum power over a very small range.
The main thing is HAVE FUN!
Cheers
Danny