Genesis question

[Prop-a-Gator]

@Dave: I'm running a Fly Sky GT3B 2.4GHz radio. I haven't ruled out a radio/servo problem. Just got an Eagletree datalogger but don't have the servo current monitor. Would be nice for troubleshooting, but another $25...

@HydroJerry: Easy for me to suggest! LOL I just meant something to separate the colors - even thin black - I think it makes things pop more. Still looks great as is.

[HYDROJERRY]

thanks Gator, the plan is the top that is still primer gray will be a plum purple and was originaly thinking either a silver or bright orange pinstripe to seperate the colors.. Ithink!!!
Its cool Dave ramble away im listening!!!!Just dont use realy big words or youll loose me,hahaha

[HYDROJERRY]

I havent forgot guys,,, im still working on the paint but almost done,, i have repainted it now like 3 times but going to stick with this last one and move on to getting it back together and see what happens with the turning wright thingyy.. My paint job went from a Genesis cat to a mystic cat now to a FC cat,,anyway..

[1945dave]

Prop a Gator, save your money a current monitor for the rudder servo is almost useless. That would not be your problem. I still say unplug the servo and run it for a test drive no rudder.

Dave

[J.Calway]

i am not sure if anyone has mentioned the control arm. on the genesis it is metal ,not carbon, and will flex slightly under load, causing a right hand turn. simply lean on the rudder whilst watching the arm to find its flex point. then apoxy a short carbon rod vertically, right next to the arm at the flex point hence stopping the arm from flexing.make sure the short piece of carbon is fixed securely...

[Prop-a-Gator]

Prop a Gator, save your money a current monitor for the rudder servo is almost useless. That would not be your problem. I still say unplug the servo and run it for a test drive no rudder.

Dave

Well, I reworked my linkage to take out as much play as possible. The only play left was in the servo itself. I also wondered if the 2mm of set screw protruding from my drive dog was contributing to prop walk. I cut down the set screw flush with the dog. I'm not sure I saw much improvement. One thing I did recall was that I used to run a heavier pack in the left sponson to keep it from lifting. Lately, I've been running identical packs on each side.

I got video of my not-so-straight straight-away run. I'll post it when I'm back in NC, for what it's worth. It was nice to take a break from thinking about it.

[Prop-a-Gator]

Hey guys, is the OP still around? I wonder if he's had any success

I read through this thread again, and it's clear we could all be talking about something different. So here's my very short vid. It's the longest pass that day and the one that best shows the "curve". In the final second or so I do give a right turn command once I come off the throttle. (you see the rooster drop) The rest of the pass is full throttle - no rudder command. This is with a ton of left rudder trim already dialed in.

If you guys can post a vid of what your boat is doing, we can all better understand what each is doing.

For me, my suspicion is torque roll + prop walk. My starboard sponson is riding much wetter than the port side. I used to run a much heavier pack in the port sponson. (4S+2S, now 3S+3S) I also had a larger prop this time - m445.

[paultbg]

@Prop-a-Gator- my genesis started to act like yours few days ago.the latest changes made before that where:
1. replacing the stock driveline with a 3/16 one.
2. using a bigger prop (45mm instead of regular 42mm).
So that the "curve" at high speed is a result of one of the above.
The problem is that with the new driveline and bigger prop, the prop itself is much closer to the rudder now,almost touching it.
I will try next days with the old prop (more clearance to the prop) to see if is the same effect.If so,the solution could be to offset the rudder.
One of the experienced guys at my club suggested the "cuve" can be also a sign of an aging servo that is starting to malfunction when pressed at high speed.
Worth to try with a different (new) servo.
Regards

[HYDROJERRY]

Please try that out and let us no Paul,,, i too have the problem but will be testing this weekend seeing im almost done with my repaint and putting her back together, heres some pics, i have done a cheap rudder offset system just to try out and have a GR 42x55 prop to try and i have a new traxxas 2075 servo to put in but in the pics is the original Hitec, havent installed the traxxas yet, ill try all this peice by peice and i also have a thick UL-1 pushrod to try but not yet..

[paultbg]

Hello all,
I have tried some smaller props with the same result: when you accelerate suddenly or at high speed the boat tend to turn right .the more power pushed the more turn it does.
But,i think that I have found the guilty part.I think is the push rod.I am using the stock one which seems decent (2mm) but it is slightly loose and allow the rudder to move to the right if you (or the water pressure) push harder.
That is available only for the right side where the rudder is connected to the rod and I can not push it to the other side.
Now there are 2 options:
1.offset the rudder like Jerry (in your case Jerry,the boat should make left now as that is the side with the rod on your case now).
2.even better option, use a low profile servo with 2 arms and a push / pull system and 2 rods, one on each side; that should keep the rudder centered.
Jerry let me know how is your boat acting now.
Regards

[1945dave]

Guys, I am getting confused as to who is having this right hand turn problem with the Genesis. Actually it appears several different guys are experiencing this situation. Just the same I also believe there is nothing special in this regards concerning the Genesis. That is name the boat and I bet this situation is pretty common on most boats. So it becomes a problem when you can't adjust or do something about it to make it less of a problem or just accept it. In my case I do not feel I have the problem. At least I can adjust the sticks (wheel) and other hull adjustments to make this a almost non issue. Now Paul is stating that the stock linkage has some slop or play in the linkage. That should be fixed. I use 4x40 pushrods and Traxxas ball links both ends. No play, no slop and sure steady control. Heaven forbid I should have slop in one of my Helicopter linkages....How fast can you say crash. Now all jokes aside understand this. The only force offsetting the effects of prop walk are those feeding left turn into the rudder. If the rudder is not deep enough, or if the rudder is not riding in clear water then the effectiveness of the rudder is going to be reduced. Still if the boat is not ballanced properly then there is a condition where the bow rises and drops forcefully allowing the stern to walk to the left suddenly and that needs to be considered as well. All things considered believe this. Never give up. Small corrections will show what is the result and if there is improvement then great if not try something else. As they say, this too shall pass.

Dave

[HYDROJERRY]

Man Dave you get deep!! hahaha, its good thow, if you dont think deep youll never figure things out.. Well during my rebuild i gess you would say,, i found that the factory push rod is very thin and while reinstalling it i found if i push the rudder and hold the servo at the same time the rod will actauly flexor bend outward just as much as the hole in the transum will let it. im thinking if i put the rudder back to factory or inline and use a UL-1 pushrod i have maybe it wont flex and cuz the wright turn thing..

[viper1]

im almost done with my repaint and putting her back together, heres some pics.

Man, that is one Swweeeeet paint job there, well done !!

[HYDROJERRY]

Thanks Viper glad you like it,,Well i got a chance to run my Genesis today before it started rainning again not very inpressive but the only thing i tryed so far was the offset rudder wich mad the boat pull to the side untill you got up to speed,, you never set it hook cuz i never got fully up to speed, i installed a new FC motor coupler and so far on two different boats it starts spining on the shaft you will see it at the end of the vid,,im going to put my old coupler back on for next time..https://vimeo.com/46184752

[Prop-a-Gator]

Good you see you got it in the water. Looking good! What did you start off with in terms of strut position? Regarding the coupler, I have that one too. (ss compression style w/ 2 set screws on motor shaft) I have never had it slip and the 3740 has plenty of twist. Still, run what you know works. Looking forward to your next run. I am relegated to the sidelines since my Daytona is still collecting dust, awaiting parts.