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RC Shark - 10/7/2004 9:12 PM   
DazDaMan


 

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From: EdinburghMidlothian, UNITED KINGDOM
Status: offline 		Hi there, this is my first post, so please be gentle!!

I want to build an R/C Shark. No, not a Gruapner one! More like a Great White one!

I've been interested in building an R/C shark for some time, and I know of one guy who has built one out of metal and plastics (Math Vos) but I was looking to do something else, possibly out of wood (although I dunno if this would work, with the model being a dynamic diver??).

Anyone got any hints/tips/ideas?

Thanks in advance.

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RE: RC Shark - 10/8/2004 11:39 PM   
Captain Nemo12



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From: Montreal, QC, CANADA
Status: offline 		Right on!

If you consider buiding it out of wood, it might be a bit challenging because you need to seal the the spaces between the planks, if you use balsa, that might be good too but be sure to cover the model with a waterproof substance, duct tape, expoxy resin, etc. One good thing about RC sharks is that you already have the fins as control surfaces, and with a a dynamic diver, the process just simples out more. I have a a few pics of my "RC Shark" if you like, I can send them to you.

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RE: RC Shark - 10/9/2004 3:18 AM   
SJN



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From: Copenhagen, DENMARK
Status: offline 		something like this

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RE: RC Shark - 10/10/2004 6:30 PM   
DazDaMan


 

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From: EdinburghMidlothian, UNITED KINGDOM
Status: offline 		CaptainNemo - I was gonna cover the thing in fibreglass (or maybe just the epoxy will do?) to seal it. Would love to see the pics you have.

SJN - something like that, yeah!

Should I build to a particular size? I was originally going to build a 3ft version (the static version I built ended up at almost 4ft!).

I had considered making the jaws work, but I might be getting a bit ahead of myself here!!

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RE: RC Shark - 10/10/2004 6:40 PM   
DazDaMan


 

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From: EdinburghMidlothian, UNITED KINGDOM
Status: offline 		Here's a couple I've found - sadly no building details!

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RE: RC Shark - 10/11/2004 12:51 AM   
Captain Nemo12



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From: Montreal, QC, CANADA
Status: offline 		Cool, it's hard to see the prop on that thing, maybe it propels by moving its tail just like a real shark!

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RE: RC Shark - 10/11/2004 1:58 AM   
DazDaMan


 

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From: EdinburghMidlothian, UNITED KINGDOM
Status: offline 		I can't even see a prop! If it used its tail for propulsion, you'd think you'd be able to see the portion of the body that moved?!

I did once see a model shark used for a robot olympics-type thing that had a moving tail. Really smart, but again no construction details

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RE: RC Shark - 10/11/2004 2:23 AM   
DazDaMan


 

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From: EdinburghMidlothian, UNITED KINGDOM
Status: offline 		CN - don't forget your photos!

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RE: RC Shark - 10/11/2004 2:30 AM   
DazDaMan


 

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Status: offline 		I'm debating the size of the shark. I was tempted to build big (for more realism), but I imagine my eventual "territory" is gonna be either a pool or a pond. I imagine, too, that a bigger shark is gonna be a **** to sink without a lot of weight in it.

Plus I was hoping to test out my waterproofing in the bath, so that rules out a scale model "Megalodon"!!

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RE: RC Shark - 10/11/2004 8:07 PM   
Captain Nemo12



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From: Montreal, QC, CANADA
Status: offline 		You asked for them! Well, My sub is only a 2 footer, since it's meant to be a dynamic diver, I didn't figure out that it will need too much space. Control is by a 2 channel radio, and the diving planes are the fins.

The sub is based on the Nautilus from 20000 Leagues Under The Sea, scale is close to 1/114.

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RE: RC Shark - 10/11/2004 9:23 PM   
DazDaMan


 

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From: EdinburghMidlothian, UNITED KINGDOM
Status: offline 		I thought of doing a sub-based model, but I dunno if it would be entirely what I'm after. I'm a bit of a perfectionist!

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RE: RC Shark - 10/11/2004 10:14 PM   
Captain Nemo12



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From: Montreal, QC, CANADA
Status: offline 		I recommend trying the tail movement method, don't know if this could work but, what if you don't use the tail for pulpulsion? Use it to steer the sub! Divide your shark into 2 halves vertically, attach the prop(s) to the 2nd half (tail). Use a geared motor system to move the 2nd half of the sub left and right, and you have your rudder! I think that for this method to work, you'll need to put some more weight into the 1st half. Don't make your shark too big or the motor(s) for the rudder movement will be too weak to turn the tail.

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RE: RC Shark - 10/11/2004 10:39 PM   
DazDaMan


 

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Status: offline 		I was thinking something about 30ins long (2.5ft), with a top-hatch instead of a middle join. Applying the K.I.S.S. principle here!

The tail was always intended (in my case, anyway) as a rudder - that's just the way I always thought it out!

I was also going to build the model with the prop projecting from the bottom (as per SJN's photos), too.

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LIVE GREAT WHITE SHARK! - 10/11/2004 11:20 PM   
DazDaMan


 

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From: EdinburghMidlothian, UNITED KINGDOM
Status: offline 		Currently in the tank of the Moneterey Bay Aquarium, California, there is a 4ft 4ins female Great White Shark!

She's been there for almost a month now, and is doing very well. Click on the link below to see the tank's webcam:

http://www.mbayaq.org/efc/efc_hp/hp_obw_cam.asp

The shark has been VERY active today!

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RE: RC Shark - 10/13/2004 10:52 PM   
DazDaMan


 

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From: EdinburghMidlothian, UNITED KINGDOM
Status: offline 		So, what I'm intending to do is an all-wood model, roughly 30in or so long, dynamic diving.

Anyone think this will or will not work?

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RE: RC Shark - 10/13/2004 11:39 PM   
Captain Nemo12



Posts: 962
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From: Montreal, QC, CANADA
Status: offline 		Nothing is impossible, here is a website that document a wooden RC sub model construction:

www.heiszwolf.com/subs ->click on the blue "Model" buttom at the left, then, click on where it says " Zeewolf" at the top.

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In the works: 1/16 T-34/85, Type VIIb U-boat, 1/72 USS Skipjack

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RE: RC Shark - 10/14/2004 1:56 AM   
DazDaMan


 

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From: EdinburghMidlothian, UNITED KINGDOM
Status: offline 		Ahhh, thanks for that link. Starting to look a bit more promising now!

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RE: RC Shark - 10/18/2004 4:05 PM   
DazDaMan


 

Posts: 103
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From: EdinburghMidlothian, UNITED KINGDOM
Status: offline 		I bought a large rubber shark at the weekend, around 29ins, and it looks just about right for the RC version....!

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RE: RC Shark - 10/19/2004 12:23 AM   
Captain Nemo12



Posts: 962
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From: Montreal, QC, CANADA
Status: offline 		any pics to share with us?

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In the works: 1/16 T-34/85, Type VIIb U-boat, 1/72 USS Skipjack

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RE: RC Shark - 10/19/2004 1:06 PM   
DazDaMan


 

Posts: 103
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From: EdinburghMidlothian, UNITED KINGDOM
Status: offline 		I'm sure I can do some tonight! Also, I'm going to have a look at some dude's subs after work, so I'll get some shots...

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RE: RC Shark - 10/19/2004 10:41 PM   
DazDaMan


 

Posts: 103
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From: EdinburghMidlothian, UNITED KINGDOM
Status: offline 		OK, here are a few pics. Enjoy!

1) The innards of the Typhoon (which I think is a Russian sub??)
2) The Typhoon and a U-boat (U-25). The Typhoon is a GRP model, while the U-boat is "bread and butter"-built. The guy suggested I build my shark the same way.
3) A British nuclear sub - I forget the name of it
4) My near-4ft static model great white shark

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RE: RC Shark - 10/19/2004 10:50 PM   
DazDaMan


 

Posts: 103
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From: EdinburghMidlothian, UNITED KINGDOM
Status: offline 		More sharks. Front to rear: roughly 12" long rubber model; 29" model bought at the weekend; Bruce - 45"

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RE: RC Shark - 10/20/2004 1:30 AM   
Captain Nemo12



Posts: 962
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From: Montreal, QC, CANADA
Status: offline 		nice boats! Does the ballast tank installation in the Typhoon work well? That's a pretty interesting position for the tanks! What's Bruce made of? From the paint, it looks like paper marche.

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In the works: 1/16 T-34/85, Type VIIb U-boat, 1/72 USS Skipjack

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RE: RC Shark - 10/20/2004 1:51 AM   
DazDaMan


 

Posts: 103
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From: EdinburghMidlothian, UNITED KINGDOM
Status: offline 		He was still working on the Typhoon, but having looked at the guts - My God! Rather him than me!

"Bruce" is a balsa-wood box with polystyrene to form the shape (in my infinite wisdom, I thought weight would counter out the bouyancy of it - d'oh!!). I was originally going to cover it in fibreglass, but once I figured that the model wouldn't work in its intended form, I covered it in cartridge paper and watered-down PVA glue, then painted it with Humbrol paints (which is why it looks a bit sub-standard!!).

Oh well....!

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RE: RC Shark - 10/20/2004 2:10 AM   
DazDaMan


 

Posts: 103
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Joined: 10/7/2004
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From: EdinburghMidlothian, UNITED KINGDOM
Status: offline 		Oh yeah, it's a bit dusty, which might account for the finish looking a bit "off"...

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