New Genesis Setup?

[J Robbo]

Ok I've been slowly collecting parts,so far I have
esc ht180
motor 4074 2000kv
lipo's Turigy nano 4200 40-80c S2 x2 for S4 setup
now I need to purchase some props to try out, looking at theses http://www.offshoreelectrics.com/cat...led+Propellers
just need suggestions on which one's to get

[TristanJones]

I personally would steer clear of the carbon filled props at that power level Id expect them to fly apart, but I might be wrong. The octura props are the popular choice but require balancing and sharpening in most cases. The most used sizes and pitches in octura for this hull are the x442 x445 m445 and there is another but I cant remember of the minute. I run a hobbyking metal 440 which is P1.4x40mm, I will be stepping up to a hobbyking P1.6x40mm CNC prop in the new year and also I will purchase the octura x442 (P1.4x42mm) to run 4s and sometimes 5s.
Hope that helps.

[1945dave]

Ok I've been slowly collecting parts,so far I have
esc ht180
motor 4074 2000kv
lipo's Turigy nano 4200 40-80c S2 x2 for S4 setup
now I need to purchase some props to try out, looking at theses http://www.offshoreelectrics.com/cat...led+Propellers
just need suggestions on which one's to get

J, you have done a good job of listening and following sound advice so far don't mess that up now. Tristan is right! forget the carbon filled plastic props. Even if you can get a run or two in with these props before breaking a blade off they flex and do not give you any idea of what the best diameter and pitch prop should be. All the experienced Genesis owners have already proven that for you. Just follow their lead. If you could only have one prop in your inventory it should be the Octura M445. Any of the Octura X series props are close but the M series is best (slightly less lift) for the Genesis trust me.

I will make one comment only about the CNC props. They are pretty. The only reason I can think of for guys to choose any prop over the Octura series is they are afraid of the "needing to be sharpened and balanced" comment. This is not really as scary or time consumming as many think. Balanced and sharpened Octura props are available from a number of sources but doing it yourself a few times is worth the time and effort. Balancing is definately needed to minimize vibration and potential damage. Sharpening is strictly optional. Polishing totally optional.

You know if you follow the recommendations found on this forum for the Genesis you might even consider the whole process boring. The Genesis is a fun boat and a good value and setup like everyone recommends will perform with little variation from optimum. There is very little you can do to tweak this boat any further. Don't spend large amounts of money trying to over power or go ridiculously fast like some youtube videos show. Stay within the 4S to 5S limits and learn to drive this boat. Then after you are really hooked on this hobby consider another boat down the road.
]
Dave

[TristanJones]

That's some good advice right there, I'm only 6mths in with my RC boating hobby and I see what your saying RE the genesis, it is a great hull, it looks awesome and performs quite well. I will be happy with a 63-65mph boat (just want to crack 100km/h on 5s). I will get the m445 for mine in the new year. (time for an out rigger then)

[J Robbo]

Thank's guys I'll order those three props (x442 x445 m445) and start reading up on balancing & polishing props.

[TristanJones]

There are pretty good youtube videos on how to correctly sharpen/thin and balance a boat prop. balancers are cheap frm hobbyking, thats all I use and have had no problems.

[J Robbo]

I finally have my Genisis ready for It's first run.fingers crossed it all goes good.
IMG_0129.JPG
IMG_0130.JPG

[TristanJones]

Looks awesome. Let us know how that second water pick-up works. Im trying to work out how Im going to do that mod myself, I like that idea!

[J Robbo]

My first outing was abit of a failure the boat was extremely slow and would not get on plane.
seemed to drag it's arse and had a very messy rooster tail out the back,Temps were cool.
Im a complete newby to boat setup so I'm looking for suggestions.
I'll do some reading on COG and strut height in the meantime.

esc ht180
motor 4074 2000kv
lipo's Turigy nano 5800 hardcase 40-80c S2 x2 for S4 setup
m445

[J Robbo]

ok after a little research I think I had the strut way to low (not the original strut)
I have reset it so the strut and tne last ride pad are level.

[1945dave]

ok after a little research I think I had the strut way to low (not the original strut)
I have reset it so the strut and tne last ride pad are level.

Wow! Never expected to have any issues at this point.

1st. Why did you start out with a skeg strut? However, skegs are not bad but no skeg infront of a prop should be wedge shaped. All skegs infront of props need to be streamlined, tappered front and rear. Rudders are wedge shaped for a reason. Struts are not for the same reasons. IF THIS IS YOUR ONLY STRUT SO BE IT BUT IF YOU HAVE THE STOCK STRUT TRY IT FIRST.

The ugly rooster tail that you experienced is from the offset rudder bracket. It is acting like a parachute. If you can ever get the boat up on plane you may be able to get the bracket high enough that it won't catch so much water but this is a problem with this style of bracket. In the case of the Genesis the inline stock setup has a small advantage in this dept.

Put your boat on a flat kitchen table and take a good profile photo showing us the relative position of the strut and water pickup. With a skeg you will have to leave the skeg hang over the side of the table. The correct mounting positions are not only parallel with the table surface but above the table surface as well. If you did not have a skeg you should be able to slide the boat on top of the table with only the rudder and perhaps a 1/8th inch of the water pickup below the table top while the boat rest on the twin hull fiber glass riding surfaces.

Make a few tweaks and you should be good to go.

Dave

[J Robbo]

Thanks Dave, I made a last minute decision to change the drive line to 3/16th and bought a kit that was supposed to be for the genisis and this was the strut it came with.
Is there any reason why I couldn't just remove the bottom(skeg) from the strut? Thanks for all your help.

[TristanJones]

Is the boat pulling decent RPM at a blip of the throttle out of the water? I dont recommend you rev the *!***!***!***!** out of it for ages, just a quick blip to be sure its got plenty of power. I can see no reason not to remove the skeg if your neat with a dremal but Im sure Dave can answer this for sure. Shame it didnt go for you as hoped, but at least you can try again today and hopefully get the results your after.

[1945dave]

Thanks Dave, I made a last minute decision to change the drive line to 3/16th and bought a kit that was supposed to be for the genisis and this was the strut it came with.
Is there any reason why I couldn't just remove the bottom(skeg) from the strut? Thanks for all your help.

Well, NO, there is no reason to not just remove the skeg but please understand I don't think this is your main problem. Meaning...if you remove the strut skeg and don't do anything else the problem will still be there. Or to put it another way, if your parachute can be addressed first the strut issue may not be very noticable. Yet, the wedge interupts clean water to the prop and cavitation will but a real problem.

If you can look at the rudder bracket and visulize how that flat area is catching the water the logical solution is to open this area up so not as much metal is catching water. I prefer the two small 3/16 th rods to offset the rudder. or even the inline factory setup.

Dave

[TristanJones]

Dave, if you were to add another water pick-up to this hull what would be your preferred type?
I like the look and idea of the brass through hull pick-ups the ones that look like little hose barbs. Are you aware of a particular part of the hull that would be the best position? Im thinking one in each of the sponsons at the rear.