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48" X cat design and build

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Old 04-06-2014, 02:05 PM
  #76  
F1madness
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Started fitting hardware,finished the stringers & transom plate and setting out for correct CG placement












Old 04-06-2014, 02:10 PM
  #77  
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Stringers & transom plate now fibreglassed in and sorted radiobox so thats ready to fit in







Old 04-07-2014, 08:08 AM
  #78  
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Coming along nicely, all cutting and drilling is now done
Final trimmed hatch opening
Cut and fitted stainless scoops, 1 short but on order haha
Grab handles,exhaust and water outlets fitted, holes drilled for cooling pipes
Front hatch hold down tab done
Stuffing tube shaped and epoxied in
Also fitted some vinyl & ordered rest today












Start installing everything now
Old 04-07-2014, 09:34 AM
  #79  
Hesco Racing
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OK looks good, well done. been long time to get to this point.

1 tip where the stringer go into the transom plate. Notch the corner off at angle to allow any water maybe coming into the boat between the stringers to drain out to the sides.
Nice placement of the throttle servo. Have done about 14 radio boxes for guys and never thought of that way.
Another suggestion is the hatch locating tab. Have had plenty hatches with tabs like that crack the deck when the sucker flips. Last couple boats had the tab go under the deck. That way when it does rip of it does not take fiberglass with it or crack the deck.
I think you have less than half of the air outlets you need. That boats is going to starve of air and run ridiculously hot. 3 times bigger out than in.
Next boat drill the 2 water out lets not in line. When you race past the front one sprays water over the back one and you can not see if the back one is really pumping.
Why does your carb look wonky. Have you got it inside out no something just looks funny is it a different isolator block?

Cobus

And assume the pool noodles are still coming?
Old 04-07-2014, 09:51 AM
  #80  
F1madness
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Thanks Cobus
Ill do the suggestions on next hull
I can add more outlets for air
Its a different Isolater block rotates the carb round ,ill get a pic for you
Pool noodles are still to come LOL
Old 04-07-2014, 09:51 AM
  #81  
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Starting to install everything now Fuel secured and pipe work sorted,installed rudder and cooling pipe,made a piece to hold cooling and filler side of fuel pipes tidy and away from exhaust & engine rails in








Old 04-07-2014, 10:22 AM
  #82  
F1madness
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Engine and exhaust installed,fuel & cooling pipes plumbed in
Also changed the carb to 1048 see how it runs with this on to start with






@ Cobus ,iso block rotates the carb and puts the throttle arm under itself

Old 04-07-2014, 11:30 AM
  #83  
Hesco Racing
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Is that red silicone tubing or tygon tubing?

Cobus
Old 04-07-2014, 12:14 PM
  #84  
F1madness
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Its red sillicone

Nearly there now Driveline in and radiobox ,couple bit n pieces to finish off and ready for bench test




Old 04-07-2014, 12:26 PM
  #85  
martno1fan
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Your not hanging about Daz lol,seem to have seen that rail system idea somewhere before lol.
Mart
Old 04-07-2014, 12:42 PM
  #86  
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LOL just trying to get it done bud so its ready for weekend race ,boyd will be racing his V2 X cat aswell so gonna be a fun day setting up and testing LOL
Plus need to get back on the other builds
Old 04-07-2014, 02:00 PM
  #87  
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Do you have exponential curve on your transmitter that you use? If not I would rethink you throttle servo horn setup. The way you have it you are going to have a very dead stick at WOT. If I had to guys your would move the trigger/stick nearly half of the travel before the carb reacts.
Also look at the steering link on the rudder side. That "quicklink" system tends to wear the steering block arms's hole out within a few runs and then you start getting slop on the steering. If I were you I would turn the whole link rod around and have the ball link on the rudder side. Those quicklinks last much longer in the plastic servo horns.
Just 2cents from 16 years of racing and building boats.
Cobus

Last edited by Hesco Racing; 04-07-2014 at 02:06 PM.
Old 04-08-2014, 12:25 AM
  #88  
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Hi Cobus
Yes bud i got expo on TX ,radio box placed in temp while i wait for other vent to arrive then can install it properly and set everything up
I appreciate all experienced advice ,ill look at the steering link when i can reinstall radiobox
Old 04-08-2014, 08:05 AM
  #89  
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Started the engine for 1st time ,2nd pull it fired straight up so well pleased ,no major issues
http://www.youtube.com/watch?v=X408mVNA6Ac&list=UUaL9d4jUpBXPgaKCz3ASTow&feature=share
Also decided to make slight mod and allow more exhaust heat out


Old 04-08-2014, 10:17 AM
  #90  
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ALL DONE
Apart from vinyl and getting it on the water and setting it up shes ready to race












Old 04-09-2014, 08:05 AM
  #91  
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Little project for today










Old 04-09-2014, 03:54 PM
  #92  
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You are a true craftsman! That is one sweet looking cat. You have done a beautiful job on it from start to finish. Thanks for sharing your build with us.
Old 04-10-2014, 12:02 AM
  #93  
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Thanks madanna
No problem ,theres still abit more to come yet and some videos to follow once it hits the water
Old 04-10-2014, 08:17 AM
  #94  
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Nice one on the steering rod much neater and straight. Just noticed you have the rudder bottom still parallel with the hull bottom. We file the rudder as to not have it generate lift just steering. Have had boat do funny things and then it comes back to the bottom of the rudder not taken away. Not saying you must do it just something to watch. Enjoy I'm sure she will run great.

Cobus
Old 04-10-2014, 09:04 AM
  #95  
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Thanks Cobus
Ill keep an eye for funny things happening
Really looking forward to running it iv just doing the vinyl on it as only got rest of it today
Ill get vids
Old 04-10-2014, 09:09 AM
  #96  
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All finished and ready,added rest of vinyl and had ago at vinyl wrapping the sponson tips which hasnt worked out to bad










Last edited by F1madness; 04-10-2014 at 09:14 AM.
Old 04-13-2014, 01:34 AM
  #97  
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One of the cleanest builds I have ever seen! Cant wait to see some vids.Cheers Greg
Old 04-16-2014, 06:13 AM
  #98  
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Thanks Greg
Did run this weekend but crashed out 2/3 rds of a lap round ,steering servo clamp failed and lost steering,no major damage only couple small repairs and new flexi will fix it and get back on the water soon
Old 04-16-2014, 06:23 AM
  #99  
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How did the servo clamp fail ?seems odd.
Mart
Old 04-16-2014, 07:32 AM
  #100  
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The 1/4 scale servo is just a bit higher than the posts
Stripped the threads on 1 side so servo came loose
1st time iv had this happen and used the same mounts and servos before and never had any issues
Iv sorted now and is solid


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