RE: QUEST FOR SPEED
 

Thanks Hal, I would like to state that this hull is not meant to turn. It's meant to go straight only. Just think of it as a air (drag) boat.

RE: QUEST FOR SPEED
 

The build is finished. She is ready for the water.

RE: QUEST FOR SPEED
 

Ok I do'nt live in the US , but I would like to give the speed record a go .
As long as their is one standard ,And that is that the boat mostly remains in contact with the water . To much air time and they become airplanes not AIRBOATS .;)
Lindsay

RE: QUEST FOR SPEED
 

It's great to see that others want to participate. We have come up with rules for the contest. http://rcairboats.net/v-web/bulletin...pic.php?t=1385

We look forward in seeing your build and the attempt. Good luck and happy boating. Andy

RE: QUEST FOR SPEED
 

I had a problem with the hull before it ever hit the water. I applied the last coat of clear and put the boat in the drying booth. WEll, I kind of lost track of time and rushed down to see the boat. It looked like a banana all warped up. I decided to still put her in the water for a little fun. I cannot say enough good things about the motor. As for the hull...a hunk of junk.... will have some video of a wreck soon.

We tried the radar and had a hard time getting a good reading. I think the reflection on the water may have caused some of the troubles.

I have scrapped this hull and currently making a new and lighter style.
http://www.rc-airboats.com/gallery/v...eyore_test_run

RE: QUEST FOR SPEED
 

I watched the vid a few times, and I can say that you are on to something, I feel with just a little tuning that you will get a speed that will take some work to top. To get this hull on plane, did the sponson tubes drag much?

RE: QUEST FOR SPEED
 

Hal, the support did not drag at all. With the hull being warped the sponson were not touching the water. Thats why the hull rocked side to side. I can only imagine what speed this hull would reach if the boat was not warped. I need better cooking skill.

RE: QUEST FOR SPEED
 

I have started on a new boat QUEST FOR SPEED 2. Powered by the same Evo 1.00 with a little twist. Same concept with a little different hull configuration but heres the kicker. Try to maintain a ratio of 1 to 1 weight / hp. I believe I can come very close with a little luck.

RE: QUEST FOR SPEED
 

Well gents ... just went out and bought a new MDS 1.48 which I am gonna use strickly for this "speed" record breaker that I am gonna build .
So ... hope you guys got your GPS units handy and available for videoing .

BTW - I also think that the video should show the unit IN the boat registering zero ( mph ) and show the entire run and this includes when the boat comes back in to shore and a close-up of the GPS unit then .

RE: QUEST FOR SPEED
 

3 steps ahead of ya Terbo.....

[link=http://rcairboats.net/v-web/bulletin/bb/viewforum.php?f=32]Speed Contest[/link]

RE: QUEST FOR SPEED
 

The mind has been made on which hull style, just a few more parts to come in and soon it will be ready for a test run.
[link=http://cajungatorairboats.com/v-web/bulletin/bb/viewtopic.php?p=2203#2203]Will it work?[/link]

RE: QUEST FOR SPEED
 

Great looking Weapon,:D . One question how much Hp does the engine have?My boat is still on the drawing board , I am aiming for a Power/weight ratio of 1/1 .

RE: QUEST FOR SPEED
 

The HP is just under 3hp. Getting a 1:1 ratio for this engine would be very hard to do, the engine alone without the muffler is 28ozs. then add in the weight of the 1/4 scale servo 4.5ozs. then add in another 16+ozs. for the muffler, throttle sero, batteries, Rx, switch, linkage, bolts/nuts, and the fuel system. Already over the 1:1 ratio with out adding in the hull. The good news is that the engine can still be cut, compression change, and tuned to run a higher nitro, aiding in the gain of HP/RPM. Never the less this is just a test boat, it may not do anything, I'm hoping that it does well.

RE: QUEST FOR SPEED
 

Well, it certainly looks good:D

RE: QUEST FOR SPEED
 

Get the tank higher, the carb will have trouble drawing fuel at full throttle. Plus a water rudder works a lot better than the air fin. Good luck.

RE: QUEST FOR SPEED
 

If your building another version, my 2 cents. Set the sponsons up deeper so that the center section (tub) is clear of the water at speed. Use a hopper tank topside and the main tank down in the tub. Run throttle cable up to the carb instead of topside. You'll want all the weight you can get down low. If I were going to try a project like this, I'd have the engone low mounted with a belt drive up to the prop.
The Japanese were running only .40's on basically outrigger hydro's and going mear the 150 MPH mark.

RE: QUEST FOR SPEED
 

I've heard that before.....but are there any vids of these things going that fast?

RE: QUEST FOR SPEED
 

I don't know, I haven't seen any. RCBM did a small article on them years ago but it did generate a lot of interest.
It would seem at those speeds that you would want some kind of control to keep it on the water using a 3rd or 4th channel for an elevator or wing to keep it from getting too airborne.

RE: QUEST FOR SPEED
 

Are we sure of that 150 MPH? could it have been KPH? ( 100KPH would be something around 60MPH - that sounds doable) Something does not quite make sense. Are there any airplanes that reach 150 MPH using the same engine? While this sounds more possible, dragging through the water is tougher (about 800 times thicker), not to mention, the weather seen in the pic (I saw) of the Japanese boats was rough, not the best for speed. I would love to see better verification of the speed those boats hit. I am not saying the speed is unattainable, but some of the attepts here are using much larger more powerfull engines, combined with accepted high speed hulls that are about the same size, and we have come nowhere near this fabled 100+ mark. Lots of questions to be verified. Sean

RE: QUEST FOR SPEED
 

Yes, it was 150 MPH, no typo there. There really isn't much of anything in the water at those speeds, the reason why it needs a wing to help maintain control.
I know that the waters in Japan are usually rougher than what we have here in the states. I have a DVD video of some Japanese running outrigger hydro's. The set their sponsons wider than we do for more stability.

RE: QUEST FOR SPEED
 

can you somehow put part of that DVD onto your computer and up-load it so we can all enjoy? :D:D

RE: QUEST FOR SPEED
 

Not with this one. My good 'puter took a dump otherwise I could. I might have a site that has Japanese boat racing videos.
Try www.jmpba.com to see what they have on there. Be forewarned as it's in Japanese though so if you can't read it (I sure can't!) use something like the Babelfish AltaVista translator. Be prepared to have some snickers as some things don't translate well into English.

RE: QUEST FOR SPEED
 

heres a vid of the hydroking this thing looks near the 100 mph mark i hope the link works if not go to www.radiocontrol-2005.com and click on the pic of the hydroking and theres a vid of it[link]http://www.radiocontrol-2005.com[/link]

RE: QUEST FOR SPEED
 

just started making boat for speed quest . motor will be going at the back mds 78 for test runs . the pontoons haven't been attacted to the cross members yet.the bit on the the bottom back isn't stuck on do you think it will work any suggestion would be warmly welcomed.i will glass it to finish it.length is 39 inche by 29 inche

RE: QUEST FOR SPEED
 

Neat looking boat!

I don't know why the step on the back of the boat won't work. Try it and see. I think it's a good idea as it should help get the center section of the hull out of the water and reduce drag.