engineman351

Barring and sudden requests from the wife...I'm looking at being at Stony Pond late AM early PM on Sunday to run a couple of boats. I will probably bring a Gas Rigger and a Gas Thunderboat. Craig...Hard to tune? Most of the time just 'Pull and Go!! I will admit they do land 'hard' if they decide to become a plane!!! Roger

Blackout

Gas boats have large props and allot of torque so more prop walk issues on some hulls. That is where I was coming from. Carbs are more complicated too, as well as the ignition system. I think that if you know nitro engines, they are just as easy to start and keep running.

Keep in mind, I like to pick fun of the gas boats just because I am a nitro guy...

I'll be around on Sunday, so I'll look out for you. I'll need to figure out what to run if the water is rough. We are suppose to have high winds all weekend, but Sunday is the better day so who knows....

Looks like Bob brought over a gas grill that will feed an army! Thanks Bob, should work good!

Neil, I see you found a killer engine for your JAE 45! Good find for sure!

advanced builder

Yes a .45 just for speed. SPEED SPEED
I'm done buying after this. too much. I would like a new gas Vee hull. riggers cats and Vee hullsNo tunnels No thunderboats No cracker boxes
Sunday for me is off I think. I'm still messin with that .21 cat. not satisfied yet with the setup.

Blackout

Roger, Inspiration for fixing your VS1. Jerry and his VS1.

HeliDrop

I want one of those little VS1's. They are a neat simple little boat and you guys seem like you have a lot of fun driving them. 

advanced builder

I got her running !!!! My G2D Zenhoa. But I shut her down quick I seen some thing coming out of the flywheel side. More fixing or hard plastic. I gotta pull her open. I never got behind the back side of the engine to look at anything. gotta do it now
FOUND A SCREW STUCK TO THE MAGNET

tomstoys2

My Feedback: (3)

Hey Guys,
Sounds like a few of you might be out Sunday. Would it be OK if I stopped by? Not sure what's going on Sun but if I can I wouldn't mind meeting you guys.
Tom

advanced builder

What about this one.

Blackout

Sure, but it's going to be weather dependant. I have nothing worth running if the winds stay at 20 - 30 mph. My cell is 585-350-9853 if you want to check on what is going on.

Started working on the JAE 12 sponsons, so that's one good thing about bad weather....

advanced builder

I did get that engine running ,not now. fussy SOB The pull is very hard It gets stuck at TDC I go back and try a few times and no luck

Blackout

The weather never let up over here. Very windy and drizzle. No one ran boats, not worth the effort....

advanced builder

We got one or 2 left this season. I'll have 3 to test. When the weather cooperates.

Blackout

Maybe the weather will cooperate this weekend.

HeliDrop

We got out on North Ponds Park in Webster on Sunday. We got rained out on Saturday so we tried again Sunday and hit a small window. It was an interesting day like always. 

Blackout

Like I said before, try a smaller prop, it can't hurt and takes 5 seconds to change over...

Zippkit sells an electric JAE kit that is the same size as my .21 and can use the RTR electric drives from Aquacraft. That could be a fun option if you want the ease of electric. But, you will be charging batteries when I am running my 2nd and 3rd tanks through..

engineman351

HeliDrop...Give me a call when you get the OPS out of the boat and apart. I'd like to look at the 'bits'. Was the prop on the rigger the same one your dad used, or is it one you picked off the prop chart? I can't remember what number it was. Roger C.

HeliDrop

I have a X457 on it. It's the same prop that my dad had on it for years. 

Blackout

3.5 is a .21
6.5 might be a .40
7.5 is a .45

I'm sure you can pull that prop, but if the motor is not up to what it was when your dad ran it, you might have better luck with a smaller prop. It surely was very fast when I saw it running on my pond. A slightly smaller prop and it will still be fast.

Billk44

Riggers normally don't like X series props. 1457 is the typical 45 prop. I run 1655's in various pitches on my 45 SGX. What is your pipe length??
Bill

HeliDrop

If that's the case then the Octura Prop chart says X455, X4553 & X457.I'll try to bump it down. I think I've got a X455.

Bill, I couldn't tell you what my pipe length is right now. I'll have to measure it up tonight after I look for that prop. I'll see if I've got any non-X props.

engineman351

Eric, Bill's point on the 'X' series (X457) is that they have a lot of the prop lift taken out of them vs the 'non X' series (1457) props. They actually are rated for the same diameter & pitch. Riggers and most 3 point Hydros run the lifting series as it helps keep the stern out of the water. In practice however, most guys use either series if it makes the boat go!! If you have a '455' or even a '452' we should try them. The smaller prop might match whatever power the motor is putting out better and help on the launch. The pipe length could be an issue with your power too, especially since the motor and pipe have been in and out a couple of times) I have some basic pipe length's at home for various size engines. The .40 would be considered a 6.5cc engine (6.55482562772 to be a bit more precise). Again, there is no set length for any engine. You start with a 'ballpark length' then you need to adjust for engine timing, nitro percentage, and prop load. Since we have seen the boat go a couple of times I think you need to make sure everything is assembled correctly and that there are no air leaks in the fuel system. Then set the pipe on the 'longish side', try the smaller props, and see what happens. Weather permitting, I am still hoping for a Stony Pond outing this weekend. I think I originally set your needle to '4-4.3' on my flow meter. We should see where that is in turns on your needle. Roger

engineman351

Eric, Per a John Finch article on tuned pipes, on a .40 engine, a good starting measurement would be 11 inches. That is measured from the center of the cylinder to the 'bead' or the fatest part of the pipe. Let me knpow what your setup measures now. Roger

advanced builder

Thanks Roger I 'll need info on the .45 engines, I have a .45 Zippkit rigger on the flat board now.I'll be needing a mount looks like 3 1/2 " inside ,I'll need a special one. the .45 is how wide ? I picked up a .45 CMB used.Not here yet. A mount will need to look like?? the .21 that Joe sells I think. or the JAE mount. Not much room inside. Now where to find one or make one. No prints to look at. I did find one surprise inside the bag of goodies. A sponson side plate for the turnfin. The sponsons are built it's going on the outside. I''ll show a pic

Blackout

Neil, Not sure if you saw what Mike Hughes did for his JAE .45 engine mount, but here is a picture from his Intlwaters build thread...

Edit: You might not be able to see the picture, sometimes it works, sometimes not....

Blackout

Yup, the Speedmaster mount only goes down to 4". There has to be other riggers with 3.5" tubs. Maybe using the inside pieces and mounting the spacers directly to the tub sides would work. Allot seem to do this with grommets and nylon or delrin spacers.