Questions questions

[Tony Marquart]

Well, I almost went electric but I pulled back at the last minute. The charging time and all the tape is just not for me.

I think the right step back in for me is going to be the thunder boat. And I have questions.

Going from nitro to gasoline, it is still a two-stroke engine. So I am assuming that all the same principles with nitro engines apply to gasoline engines is this correct? Nitro pipes are like gold nuggets. And many perform way different than others. Seems like gas pipes, u either have one or don’t.

is there any type of back pressure for the fuel system?

is it true that the needle settings for the carburetor is not as sensitive as a nitro engine? Is it pretty much getting it set right and then only very small adjustments with big weather changes?

what about tune pipes? Do the same principles apply? Shorter equals more rpm less torque and the inverse as well? Do we still need to adjust the tune pipe length with different propellers?

What about the after run ritual? Do we still blow the engine out with lubricant?

The thunderbolt class sounds like something I can get my head back around. Spending more time on boat set up and driving than throwing money at every one and a half mph possible

another thought, if I was to build the zip kit missile thunderbolt, could I change the motor out and run the same boat in like an open Hydro class? Pop in a larger displacement engine of the same case size, change prop and some set up, and have a competitive hull?

overall thoughts on this zipp kit hull? Overall I think the design looks pretty good. I see a few weak points that I might beef up in my build.

thanks in advance

 

[Tony Marquart]

Are these stupid questions? I’m really surprised that no none is responding.

 

[dschigoda]

I’ve got the same questions.

I suspect that since many guys use I.V. Bags for a fuel tank, they don’t use exhaust pressure for the tank?

 

[P THOMAS]

Well, I almost went electric but I pulled back at the last minute. The charging time and all the tape is just not for me.

I think the right step back in for me is going to be the thunder boat. And I have questions.

Going from nitro to gasoline, it is still a two-stroke engine. So I am assuming that all the same principles with nitro engines apply to gasoline engines is this correct? Nitro pipes are like gold nuggets. And many perform way different than others. Seems like gas pipes, u either have one or don’t.
*** gas tuned pipes cost a bit too, Zipp has the right stuff and there are other good choices.

is there any type of back pressure for the fuel system? **** NO you use a plastic tank with a open vent or the fuel bag system

is it true that the needle settings for the carburetor is not as sensitive as a nitro engine? Is it pretty much getting it set right and then only very small adjustments with big weather changes?
***** normal settings get you going for the carb you have after that only about 1/4 turn or less matters

what about tune pipes? Do the same principles apply? Shorter equals more rpm less torque and the inverse as well? Do we still need to adjust the tune pipe length with different propellers? *** Yes it is the same game too short and less power at times

What about the after run ritual? Do we still blow the engine out with lubricant?
**** You do not have the corrsion that nitro fuel has so maybe just some wd40 dont put it away wet.

The thunderbolt class sounds like something I can get my head back around. Spending more time on boat set up and driving than throwing money at every one and a half mph possible
**** Good luck on that we need every tenth of a mph

another thought, if I was to build the zip kit missile thunderbolt, could I change the motor out and run the same boat in like an open Hydro class? Pop in a larger displacement engine of the same case size, change prop and some set up, and have a competitive hull?
**** You can do that run the T boat in a gas sport hydro class but the speed would be less that a good gas splrt

overall thoughts on this zipp kit hull? Overall I think the design looks pretty good. I see a few weak points that I might beef up in my build.
**** zipp is a good design
thanks in advance

 

[TomGracey]

Take a look at ML Boatworks he has way more options for 1/6th scale Gas hulls
https://mlboatworksrc.com/

 

[Tony Jacuzzi]

is there any type of back pressure for the fuel system?

- Not required carbs are pulse pumped so just a single fuel line from the bag to the carb

is it true that the needle settings for the carburetor is not as sensitive as a nitro engine? Is it pretty much getting it set right and then only very small adjustments with big weather changes?

- Settings are very standardized for the carb needles (2 per carb) and do not generally change. Two most common carbs used are the Walbro 1040 and WT257, settings though are different from each other

what about tune pipes? Do the same principles apply? Shorter equals more rpm less torque and the inverse as well? Do we still need to adjust the tune pipe length with different propellers?

- Same idea and concepts, good starting point info though is available to run well

What about the after run ritual? Do we still blow the engine out with lubricant?

- None required after running , if your boat flips or dunks you pull the plug expel the water and restart to make sure there is no moisture in pipe or engine. When done for the day nothing needs to be done, way faster

The thunderbolt class sounds like something I can get my head back around. Spending more time on boat set up and driving than throwing money at every one and a half mph possible

another thought, if I was to build the zip kit missile thunderbolt, could I change the motor out and run the same boat in like an open Hydro class? Pop in a larger displacement engine of the same case size, change prop and some set up, and have a competitive hull?

- YES but not sure how competitive that setup would be the gas sport hydro class is very fast , boats handle well. T-boat is stock Zen 260 PUM motors only

overall thoughts on this zipp kit hull? Overall I think the design looks pretty good. I see a few weak points that I might beef up in my build.

- Good running fun to build, weakest point is the front joint between top and lower I re-enforced mine during the build

 

[Tony Marquart]

Thanks for the responses guys. I do know Mike and I'm aware of his boats. I don't know that I'm looking to do a true scale build though.. plus I'm looking for a more all inclusive kit..

 

[LohringMiller]

You might be interested in my article on a gas scale build and a comparison to my thunderboat. See
http://namba.com/content/library/propwash/2013/March/#/15/

Lohring Miller

 

[Ron Olson]

I tried building the Zippkits boat Like Tony said, the joints are weak, especially in the nose area as I've seen reports of them blowing open and not in rough water. Thin ply joint-to-joint areas don't have much for the adhesive to stick to, some wood sticks, at least 1/4" square would help a lot and possibly some shaped aileron stock for the nose. I gave up on it and bought another hull.

 

[Ronnie Lerew]

Tony,
Sign up on JRCBD.com that is a gas site. They have a builder post talking about the Zippskit SLR Missle kit. Some of the builds address some of the concerns talked about above. Also show pictures. I have one I'm going to build this winter. Great starter boat and if you don't run stock put some horsepower in it and go fast. Hope this helps. Merry Christmas and have fun with your build.
Ron

 

[Tony Marquart]

What hull did you get Ron? Did you have better results?

Tony,
Sign up on JRCBD.com that is a gas site. They have a builder post talking about the Zippskit SLR Missle kit. Some of the builds address some of the concerns talked about above. Also show pictures. I have one I'm going to build this winter. Great starter boat and if you don't run stock put some horsepower in it and go fast. Hope this helps. Merry Christmas and have fun with your build.
Ron

Thanks Ron. I will do that.. I am an experienced builder,. but this would be my first gas build.