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RE: swashdrive jetboat
You will have to sand down the ridge on the top and bottom of the pump to alow a nice tight seal where the rubber boot goes, otherwise water will leak in. If you check out my build thread on modeljetboat.com you will see how I did my pump installation.
Posted on: 9/2/2012 8:24 PM by Author "dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11215160
RE: swashdrive jetboat
Adam has the backing plates if you want one you could ask him for one. You can make the rubber gasket from a bicycle inner tube. Cheers Jason
Posted on: 9/2/2012 2:38 AM by Author "dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11214203
RE: Gas Jet Boaters
With jets you want torque more than rpm from your power source. I'd stick with a single engine to a single pump. When you design your impeller make sure the blades overlap so you get the best prime possible. The Jettec pump (re named swashdrive) is the only model jetpump currently on the market with overlapping blades. Not one of the Graupner, MH$ and Hobbyking pumps have overlapping blades and all, from my experience, suffer badly with cavitation and pump priming.
Posted on: 8/27/2012 5:39 PM by Author "dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11208284
RE: Gas Jet Boaters
Going from a singe engine, through a gearbox to twin pumps and back to a single outlet has four main issues I can see. 1 - loss of energy through gearbox and twin pumps 2 - flow problems where 2 pumps join into one nozzle (complicated stator required) 3 - you want the uptake as far back on the hull as possible, so you will have lots hanging out the rear 4 - when the hull leans over in turns you will likely suck air in one of the uptakes & cavitate/airate the system Cheers Jason
Posted on: 8/26/2012 7:22 PM by Author "dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11207077
RE: swashdrive jetboat
With the Jettec pump, most of it hangs out the back of the boat. The hull ends between the uptake and where the rear cone bolts onto the uptake. You use a rubber boot to seal between the jet pump and the hull.
Posted on: 8/25/2012 12:57 AM by Author "dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11205226
RE: swashdrive jetboat
I like the chrome, I painted the side of my jetsprint with chrome, but made the mistake of clearcoating overtop which took the polished effect away. Looking good. Which pump are you putting in? One of Adam's Jettec pumps? We're waiting on one of them to ship out. Apparently it should ship this week. It will be good to test my Swashdrive hull against my friend's Dana Davette Jetsprint side by side with the same pump in.
Posted on: 8/23/2012 6:10 PM by Author "dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11203962
RE: swashdrive jetboat
It looks like it has two halves, but the bolts are cast into the case. It is basically the same as their last unit, but with the HK style trimable nozzle on it.
Posted on: 7/22/2012 3:35 AM by Author "dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11164229
RE: New 54
If you shorten the rudder on a cat you'll find it hard to corner. I keep my rudders long on my cats. I'd be looking at your strut height & prop (balanced & sharp) if you're having issues running in a straight line.
Posted on: 7/20/2012 4:02 AM by Author "dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11162209
RE: Gas Jet Boaters
My mistake, the Swashdrive must be 32".
Posted on: 7/12/2012 4:30 AM by Author "dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11152319
RE: Gas Jet Boaters
The Swashdrive hull is 34", the Davette hull is 36"
Posted on: 7/11/2012 4:40 PM by Author "dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11151850
RE: How many Gas boaters are in canada
An exact number or an estimate?
Posted on: 7/10/2012 3:58 PM by Author "dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11150537
RE: swashdrive jetboat
My friend is waiting on one of the Jettec units to put into his Davette, we played with the MHZ & gave up on that unit, it's got so many flaws it wasn't worth the hassle. The swashdrive hull is 34" long. I thought the Davette was 36" long. Here's my build thread on ModelJetBoat http://modeljetboat.com/forum/index.php?topic=14.0 There is also a thread on there of the Davette build I did for my friend along with a lot of other projects.
Posted on: 7/2/2012 4:43 PM by Author "dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11140449
RE: swashdrive jetboat
Having the exhaust hang over the back of the boat helps get the COG back far enough for the pumps to work properly. Having it cut across the transom at an angle also helps get teh wieght distribution left to righ balanced as well. This is important, if the weight is to onbe side or the other the baot will want to turn that way. These boats need the COG much further back than a prop boat. Here's a pick of my Swashdrive set up. It is balanced at 29% COG and if I pull the boat to one side oir the other it will tip back up and sit on the delta pad. I also posted a pic of Craig's (designer of the Swashdrive) cockpit on his personal Swashdrive, I pretty much copied his layout.
Posted on: 7/1/2012 9:00 PM by Author "dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11139373
RE: Gas Jet Boaters
Here's some pics Mike Joseph took of my Swashdrive last time I took it out.
Posted on: 6/25/2012 4:18 AM by Author "dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11130717
RE: Retrival Ideas
Hi The boat in the video is not fibreglass. It seems to be made of a type of polyethylene and has a wheel in the base of the hull for easy moving and launching. If you search the internet for Plastimo Rigid Tender you should find similar examples for sale. And probably on Ebay. I acutally feel safer in this type of boat as opposed to an inflatable because you don't need to worry about a sharp prop blade potentially puncturing an air compartment. Also we usually use the 12 volt outboard and take oars so that we have a back up propulsion method. Cheers Craig
Posted on: 4/4/2012 4:03 PM by Author "Craig Dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11028421
RE: Retrival Ideas
Personally I would only ever run my boats when there is a rescue boat available. The short clip below shows what happened when mine flipped over before I had sufficient buoyancy in the mid to rear section. Without the rescue boat I could have been waiting a long time to recover it by the other methods mentioned including wind! Thankfully once rescued the radio box remained dry. I'd recommend your volume turned up for this clip if you decide to view it www.youtube.com/watch Craig
Posted on: 4/4/2012 11:15 AM by Author "Craig Dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11028153
RE: Tunde Pipe Wrap
Hi Mike Is this tape a heat insulating type? If so, I've no idea why it should be necessary to wrap the pipe with such tape. Unless of course the set up is such that the pipe is very close to other boat components risking heat damage to them. I run stainless steel pipes and like to have some fresh air running over them to help prevent them getting too hot. I also like to ensure that no other components or hardware can come into contact with the pipe other than its mounting bracket. Craig
Posted on: 4/3/2012 10:09 AM by Author "Craig Dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11026736
RE: Why not to swim after your boat
[quote]ORIGINAL: Pavmentsurfer Im a little confused by the extreme stance on "NEVER" swim for your boat. I regularly swim a mile across my lake and back... Much farther than I would ever drive my boat anyway. Im never more than 100feet from my dock with my boat... if the water is warm, the lake is calm and the boat isnt a mile away... and of course, you can ACTUALLY swim, why not go for it. Everyone responds to this like "fine, take your life in your hands for an RC boat" but seriously... I swim every day for FUN... not even for a boat... I havent died yet. If I was a bad swimmer, or the lake was cold, or it was a river, lots of other boats on the lake or ANY other dangerous situation id agree that its very dangerous. But if the boat is 50 feet away in a warm, calm lake and your a good swimmer I can't see any reason it would be any more dangerous than putting on your shorts and going for a SWIM... [/quote] I agree with the previous contribution, NEVER swim for your boat. You "havent died yet." But remember you only die once. You do not get a second chance. Water that might seem warm near the shallow bank on a sunny day can drop massively in temperature once in deeper water a few metres out into the lake. If you get cramp unexpectedly even strong swimmers can find themselves in deep trouble. I am a strong swimmer and I only ever got cramp once in my local heated swimming pool. I thought I was going to drown within a few seconds. If you get entangled in any underwater debris it can cause panic and drowning in seconds. If you catch your hand on sharp propellor of your boat and start bleeding that again can cause panic when you are out alone neck deep in water. The scary thing is that when something does go wrong in deep water, the situation can escalate in seconds with fatal consequences. Quite simply the risk is not worth taking in my opinion. Regards Craig
Posted on: 3/14/2012 3:51 PM by Author "Craig Dicko"
in the forum "RC Boats General Discussion"
http://www.rcuniverse.com/forum/fb.asp?m=11000209
RE: Chinese Gas Engines
Hi Mike My first gas boat (a Flybridge) was a ready to run boat fitted with the Zenoah looking engine. The boat hardware looked good. In respect of the engine it proved very reliable, easy to start but with less power than a stock Zenoah. Its key weakness compared to a true Zenoah was the pull start mechanism which internally is very different to the genuine Zenoah mechanism. Although this boat for me was a great introduction to gas boats it had many shortcomings in terms of the durability of the hardware and the way it was assembled. I ended up having to replace most key components in a short time re-designing the layout for reliability. Personally I think it is far better (and cheaper in the long run) to build/assemble from scratch with quality hardware and a genuine Zenoah engine (assuming you like these engines as I do). Cheers Craig
Posted on: 3/12/2012 11:50 AM by Author "Craig Dicko"
in the forum "RC Boats General Discussion"
http://www.rcuniverse.com/forum/fb.asp?m=10997185
RE: RC Laser
Hi folks For my first venture into wind power after much searching of the many boats available I bought a Laser. I am very happy with this boat being a complete novice to sail boats. It ticked the following boxes for me: 1) It is very easy to assemble and get ready for running. 2) It has not even in rough conditions let any water into the radio compartment. 3) It takes different sails to cope with a wide range of wind speeds. 4) It doesn't seem to have issues that often come with many out of the box boats requiring upgrades. 5) I like the fact that it has its own class for racing and rules that prevent modifications that would otherwise give advantages to certain skippers. The concept in my opinion is a good one. Here are a couple of short clips of my first two runs of the boat: http://www.youtube.com/watch?v=3Ptp80WdgbA http://www.youtube.com/watch?v=Kx-HqDW9aQE All good fun[:D] Cheers Craig
Posted on: 2/29/2012 10:39 AM by Author "Craig Dicko"
in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=10981636
RE: SIGMA 51 WITH ZENOAH MOTOR
Hi I enjoyed watching your video and wow what a fabulous place to run your boat! I much like the Sigma especially when combined with a Zenoah. The Octura X470 prop for me runs very well on a Stock Zen although with my Lynx mono it does tend to torque the hull heavily. Cheers Craig
Posted on: 2/27/2012 11:10 AM by Author "Craig Dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10978472
RE: Boat buoyancy – What do you use currently and Why?
Thanks for your further comments. I guess that the key thing is that the chosen system works for the person using it. Pool noodles certainly appear popular today. I am pleased though that I am not the only one that endorses the 2 part quality marine grade foam. I think however that a clear distinction needs to be made between this type of foam and the aerosol or single part spray foam. Their properties are very different especially during the cure process. 2 part foam stops expanding shortly before it hardens and it cures all the way through as you would expect with such a mix. And it gets quite warm during the exothermic reaction. With the stuff I used that process took about 20 minutes after 30 seconds mixing time. The aerosol one part spray foam appears to set from the outside in (aided with moisture). With large applications (say filling the bow of a boat) the inner core can indeed remain liquid (or a sticky mess) failing to expand and set. I can understand how this could possibly give rise to further unwanted expansion over time. For that reason I will not use this type of foam as it is too unpredictable. A quality 2 part foam is in my opinion very predictable and provided that vent holes are available and the application done with care, there should be no reason to have a split or deformed hull. The 2 part foam appears to have a much tougher cell structure than the aerosol version and I’ve never had any issues with sunlight on the deck causing any expansion due to heat. Concerns have been raised about water ingress into the cell structure. I fail to see how that can be an issue if the foam is completely hidden inside a water proof enclosure (i.e. hull and sealed bulkhead). The 2 part foam that I use claims that it will not absorb water unless the cells are crushed and damaged. So even if there was a tiny hole in the hull I would think it unlikely in the extreme for this to be an issue. Cheers Craig
Posted on: 2/25/2012 4:32 PM by Author "Craig Dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10975729
RE: Boat buoyancy – What do you use currently and Why?
Thanks for your replies so far..... BH I agree that pool noodles are cheap and in a multitude of colours. And easy to remove. However, with 2 part foam there is of course no need to remove the buoyancy. It lasts the life of the boat sealed in and secure and unlike pool noodles it offers maximum buoyancy filling all areas that might otherwise fill with water. Bob You asked what happens when you “split the seam”. With 2 part foam I have never “split the seam”. Have the hull/deck joint prior reinforced with epoxy/fibre and I am confident that in a crash situation that joint will probably be the least to fail. With 2 part foam I have never had any re-build job as the boats done that way have been very robust. If I do split the seam so to speak I will update you. Bob, the “Expanding muck + bulkhead etc” as you put it, for me personally means quite the opposite of a major “Rebuild Job”. For me that set up means an unlikely failure and I like to prevent the need for any rebuilding at source. I appreciate your comments so far guys and it is good to debate this topic. Cheers Craig
Posted on: 2/24/2012 1:32 PM by Author "Craig Dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10974204
RE: Why not to swim after your boat
A BIG danger is if you attempt to swim out for your boat in cold water like 3C or below. Even if with a buoyancy aid or life jacket, after about less than 3 to five minutes you will be in deep trouble as the cold quickly gets you. At that point your legs pack up and you cannot swim further and only the life jacket if decent keeps your head above water to prevent drowning. And after that you still need a rescue facility to get you back to dry land without having others to jump in putting their own lives at risk. NEVER attempt to swim out to rescue your boat in these circumstances. I personally witnessed that only once in cold water. Never again will I want to see a repetition of that. I now will only run boats or visit venues that have proper rescue facilities available. Not only should that include a stable rescue boat, it should include rules of wearing life jackets and a contingency plan should the rescue boat get into trouble. I suggest that this is less of an issue in warm waters. However if you are running boats in very cold conditions, it is the cold water that potentially can be fatal. Cheers Craig
Posted on: 2/24/2012 12:38 PM by Author "Craig Dicko"
in the forum "RC Boats General Discussion"
http://www.rcuniverse.com/forum/fb.asp?m=10974133
Boat buoyancy – What do you use currently and Why?
Hi folks Do you use pool noodles? Bubble film? Bicycle inner tubes sealed off at their ends and pumped up as required to fill the void? Expanding foam one part from an aerosol can? Expanding foam 2 part catalytic mix? Or other methods?? For me personally I have tried all of the above. My favourite remains the 2 part catalytic marine grade foam for the following reasons: (1) I have never had issues with it absorbing water. (2) It sets quickly throughout the entire section unlike the aerosol one part stuff. (3) It adds a lot of strength to the hull. (4) It is very easy to use provided that with a big section the foam is applied via several mixes. I have started the build of my new Prestwich Thunder and these images show the front bulkhead fitted and now foamed out ready for cleaning up. Do please let me know what you use for reliable boat buoyancy and why you consider it your best option. Cheers Craig
Posted on: 2/24/2012 11:08 AM by Author "Craig Dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10974022
RE: Webra 61 Speed Champion ABC unused
Hi Coriolan I appreciate your reply. The clip you mentioned of the Huntsman with the 61 engine features my identical twin brother and his 4 foot wooden huntsman is very lively with its SC61. As you said for the time being I think I'll keep my Webra 61 quarantined. Cheers Craig
Posted on: 2/23/2012 2:57 PM by Author "Craig Dicko"
in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10972745
RE: Webra 61 Speed Champion ABC unused
Hi Thanks for your reply. I take your point on the cooling and I’d only run a Webra with zero nitro. As to your question, I primarily wanted a mint 61 for collectable purposes as I am a Big fan of Webra. In due course I might fit it in my 4 foot wooden Huntsman 31 which currently has a Webra 40 speed in it (hull not finished) but this short clip shows it in action: http://www.youtube.com/watch?v=73bGZ02PGvw However I think I’d prefer this engine in a multi hull for fun. I’ve no idea what would be most suitable? Cheers Craig
Posted on: 2/23/2012 10:00 AM by Author "Craig Dicko"
in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10972285
Webra 61 Speed Champion ABC unused
Hi folks This topic is aimed at those of you that are fans of Webra engines: I got my hands on a 61 in its original box + paperwork. It has never been previously mounted or run, originally purchased in 1987. It came with a new aero head, prop driver and washer for conversion to aero use. The next challenge is to get a quality water cooled manifold and marine tuned pipe. However, do you have any recommendations as to any sources of supply? I suspect I’ll have to have a manifold made from scratch. My other query is, are the marine versions are simply water cooled adaptations of the areo engines? Any advice will be appreciated. Hopefully some images of the engine here (my first post to the forum): Cheers Craig
Posted on: 2/22/2012 4:21 PM by Author "Craig Dicko"
in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10971239
RE: custom paintjobs
Here's my race mono & my 1/4 scale jetsprint. I did the jetsprint, I had the crocodile professionally done on the mono.
Posted on: 9/26/2011 7:01 PM by Author "dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10735707
RE: Gas Jet Boaters
Here's a pic of the rollbar sitting in place.
Posted on: 9/25/2011 10:41 PM by Author "dicko"
in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10734224
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