Speed - RC Gas Boats Discuss gas RC boats right here!

New Hydro design and build

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Old 04-05-2018, 07:49 AM
  #26  
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Originally Posted by crapshooter View Post
seems a shame to spend so much time on a nice wooden hydro only to use it as a glass plug hey.
its the way i like to build iv not got access to fancy cnc or cad etc im happy with good old pen to paper and wood build through making the molds and fg hulls

Last edited by F1madness; 04-05-2018 at 09:20 AM.
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Old 04-05-2018, 07:59 AM
  #27  
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Originally Posted by Ron Olson View Post
Daz, it's normal rules on this side of the Big Pond in the Thunderboat classes. It might be a tight fit at the transom but it's doable. I also run the exhaust through transom of my Jersey Skiff. I get my parts through Zippkits but if you have a TFL Hobby dealer there it's the same pieces. You just need a LOT of air moving through the hull. You might have run across that with your IB tunnel hulls.
Hi Ron
Iv not seen much of the thunderboat class hulls /rules etc
yeh i experienced the air flow intake on the tunnels and the original x cat which i soon figured out think iv got it sorted just trying to work out now best way to get it out got a few ideas kicking around in my head
Ill probs have to use zippkits myself just not sure yet what type of turn fin to use whether it be a speedmaster angled and or curved like the zippkits 1 they sell
None o the UK sellers have the items instock or not on there website so will have to order some in myself
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Old 04-05-2018, 09:17 AM
  #28  
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You can go into www.impba.net to see the rules that are used for the Thunderboat, Crackerbox and Jersey Skiff classes which all use exhaust through the transom. There's a lot you can learn there as to what is legal for us. NAMBA.com is the other big sanctioning body here stateside but the rules are very similar. Look for Section I if I'm right from the top of my head.
You can go to the Zippkits website and look in the online building manuals to see somewhat how we do it. He uses the 2" offset drop-down headers for some of them so it gets you around the radio box plus the room you may need to route it out. BTW, he does do Int'l shipping if you need it. You might find the hardware also on eBay.
I've got pictures of the setup but of course I can't find them when I need them.

[Update] Here's one link to show you; Click image for larger version

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Last edited by Ron Olson; 04-05-2018 at 09:24 AM.
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Old 04-05-2018, 09:48 AM
  #29  
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Thanks Ron
Some good info on there just checked against this hydro and will comply with there rules and checked the setup on zippkits site when i designed it so should be good to go
Really cant wait to get the 1st finished and out the mold should be really good fun LOL
Iv ordered from zippkits yrs ago on my 1st F1 build so will more than likely get from them will leave just choice of engine hmmm what to go for , but will see when closer the time im making a radiobox mold soon to suit the hydro and the smaller hulls so will be nice fitment
i should pull my finger out and get some more done on this build but so busy with molding at mo its crazy and trying to finish next project ready to start molding next couple weeks hopefully
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Old 04-05-2018, 01:24 PM
  #30  
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For racing we're stuck with the stock Zenoah 260 to be legal. If I had my way we'd be able to run any stock 26cc gas engine. They all Tech the same but the sanctioning bodies don't want to do that in case a tear-down is needed. The CY/Sikk/Dynamites and RCMK's pump out more RPM and HP out-of-the-box than a Zen.

I'm not going to ask what you have to pull your finger out of! We don't go there here.

Last edited by Ron Olson; 04-05-2018 at 01:31 PM.
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Old 04-06-2018, 12:58 AM
  #31  
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LOL yeh wont go there hahaha
That sucks can only use 1 engine the zenoah 260 is old hat now even the new TK 26 from what iv heard is a powerful little engine aswell
Iv downloaded the manual from zippkits and had good look through it very helpfull thanks
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Old 04-06-2018, 02:41 AM
  #32  
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You can try what you want. I don't know the rules very well for the sanctioning bodies over there.
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Old 04-07-2018, 01:54 AM
  #33  
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Old 04-07-2018, 01:58 AM
  #34  
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Originally Posted by Ron Olson View Post
You can try what you want. I don't know the rules very well for the sanctioning bodies over there.
These are our rules regarding engines
Ill decide once its completed ill get all the parts together etc between now and then so got everything ready to go

MONOHULLS

AA 0.1 – 4.60 cc (0.28cu in) I.C. Non Spark ignition (engines over 3.5 cc (0.21 cu.in) must have direct drive [not on gearbox].

Boats between 3.51 cc and 4.60 cc may also be entered in ‘A’ class at the same event)

A 3.51 – 7.50 cc (0.46cu in) I.C. Non Spark ignition

B 7.51 – 11.0 cc (0.67cu in) I.C. Non Spark ignition

C 11.01 – 50.0 cc (3.05cu.in) I.C. Non Spark ignition

D 0.1 – 65 cc (3.96 cu in) I.C. Spark ignition



CATS, HYDROS and TUNNEL HULLS

T1. Engine capacities 0.01 to 11.0 cc (0.67 cu.in.) I.C. Non Spark ignition

T2. Engine capacities 11.01 to 15.0 cc (0.91 cu.in) I.C. Non Spark ignition and up to 65 cc (3.96 cu.in) spark ignition.



Non Spark Ignition classes may use any mix of ‘Nitro’ fuel

Spark Ignition classes must use Unleaded or Super Unleaded petrol with any percentage 2 stroke oil.
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Old 05-14-2018, 12:48 AM
  #35  
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Bit of an update
Started filling , sanding and final shaping
1st coat of patterncoat primer on the canopy

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Old 10-28-2018, 05:15 AM
  #36  
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Sorry for lack of updates been really busy with moldings and other projects lol
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