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View Full Version : Another Geico with hull hop! HELP!!!



fallensk8man89
03-29-2011, 03:52 PM
some general info about my setup. im running a 42x55 grim racer prop sharpened and balanced, turnigy 5000mah 40c 2s.

ive tried every adjustment i can think of and cant seem to get this thing to mellow out. ive read all the threads on it and tried everything but the offset rudder(though i dont beleive that is the fix for it). i read that the cob should be between 8-9 inches from the transom but for me the farther i put the batts forward, the smoother it gets:doh:

any help would be greatly appreciated

some pics of how things look as of today
http://i911.photobucket.com/albums/ac318/fallensk8man89/boat2-2.jpg

http://i911.photobucket.com/albums/ac318/fallensk8man89/boat1-2.jpg

fallensk8man89
03-29-2011, 03:53 PM
also if someone wouldnt mind taking pics like this of their boat so i can get an idea of what im dealing with

dirty
03-29-2011, 04:57 PM
im in the same boat with you,the further forward i put the batteries the smoother it gets,but will not go away totally.Ive tried all the adjustmens and nothing,so i ordered the offset kit.Hopefully that will work.If you get it figured out,let me know

bbosncali
03-29-2011, 05:02 PM
I keep hearing speed is the key along with battery placement... I haven't run mine stock but ill be sure to let you know how mine fairs with all the upgrades... a lot of people have gone 5s and its gone away others have done the offset prop and that's worked for them...

Nor Cal Chris
03-29-2011, 05:03 PM
M445 prop really helps and the offset rudder helps, I have both and zero bounce with turnagy 5000 mah 40 c 2s1p flush with the back of bat. trays and zero bounce runs great!! Good luck.

Boomer
03-29-2011, 05:46 PM
Miss G on a pair of 2 cells is nice, but is not going get you into the record books.
The boat is happy running those batteries, but to see what they really can do, takes more juice!

Don't want you to hurt your boat, but when you have learned how to drive it, and want a bigger rush, try a pair of 3 cells or 6s in the lingo. As I have suggested before, a higher rated ESC is a good idea if you want to get serious about bringing things up a notch.:Peace_Sign:

Enjoy
Boomer

dirty
03-29-2011, 06:32 PM
what is a good esc,and where are they available at?and if i change the esc,and run a pair of 3s....will the motor hold it?

fallensk8man89
03-29-2011, 06:48 PM
will the stock motor hold 6s?

lectriglide
03-29-2011, 09:58 PM
No problem on 6S with the stock motor. Around 33,000 rpm unloaded. The stock esc will blow, the Turnigy or Seaking 180 is the ticket!

JackBlack26
03-29-2011, 10:19 PM
Yes, battery forward of 9" @ center is key. Your strut seems to be about right. Looks to be level with the ride pads.

As far as ESCs go, the Turnigy 120 or 180 are the ticket. I run the 180 with 3 extra capacitors added.

LiPo Power
03-30-2011, 06:58 PM
In my case installing offset rudder got rid of the wha wha...
Running stock motor, 120Amp esc on 4S and M445 prop.
I will test UL-1 motor on 4S next.
Will post video after sunday.
Pictures for now;




also if someone wouldnt mind taking pics like this of their boat so i can get an idea of what im dealing with

dirty
03-30-2011, 07:04 PM
i just got done installing my offset kit,will go run it tomorrow and see if that fixed the problem

bbosncali
03-30-2011, 07:05 PM
:beerchug:Jb hit it on the head!!! 9in from transom along with offset rudder and my maiden voyage was wah wah free!!! Not sure which one did it or maybe it was both for me but I never ran it stock only set it up to what other more experienced people recomended and I was supper happy. A lot of people say speed is also key but even at lower speed it would just glide on the water.... thanks jb I think the batteries are in the perfect spot!!!!

dirty
03-30-2011, 07:09 PM
are you saying 9" at the center of the battery from the back of boat?

bbosncali
03-30-2011, 07:11 PM
No back of battery 9inch from the back of the boat almost all the way forward on the tray so that the front of the battery is at the end of the front of the tray

dirty
03-30-2011, 07:13 PM
so did you gps it yet?

bbosncali
03-30-2011, 07:14 PM
Hope this helps... http://i1094.photobucket.com/albums/i446/bbosncali78/2011-03-30191231.jpg

bbosncali
03-30-2011, 07:16 PM
No gonna try this weekend... its between 43mph and 46mph.. I was about 1mph faster than my buddies 6s spartan and he avg mid 40's with a best of 47mph

bbosncali
03-30-2011, 07:34 PM
I see you have your rudder angled down a little have you experienced any bennifits from that? I left my strut and rudder the way it came out of the box but I have nothing to campare it to and don't plan on changing much since it rides so smooth

JackBlack26
03-30-2011, 08:15 PM
Glad it worked out for you.:rockon2:

dirty
03-31-2011, 04:11 PM
well.i installed my offset rudder v.2 the other day.I just got back from the lake after running the boat.My bounce and wah wah wah is officially gone!!!!!

fallensk8man89
04-01-2011, 12:26 AM
dang seems like this offset rudder seems to be the trick...

lectriglide
04-01-2011, 12:14 PM
Without a doubt in my book. Not saying you can't get the stock to work, but the offset gives you MUCH more flexibility with COG / battery placement. My batteries hang about 1/2" off the back of the tray, were it seems with the stock setup they have to be way up front, running much wetter.

fallensk8man89
04-01-2011, 09:30 PM
figured it out... just adjust ur strut tp bring the bow of the boat up and let it ride on the back of the pads where it was designed to run. it ran like a beaut today in fairly rough water. i couldnt beleive it. just spend some time with adjusting it. also my cog was about 8 1/2 inches from the transom. this boat really rides well on rough water too!!!

LiPo Power
04-02-2011, 09:39 PM
Same here with my boat, no bouncing after installing custom offset rudder bracket.
http://www.youtube.com/watch?v=Kdxv_ikBL_w






well.i installed my offset rudder v.2 the other day.I just got back from the lake after running the boat.My bounce and wah wah wah is officially gone!!!!!

wppracing
04-05-2011, 06:28 AM
I have a Kintec offset coming this week. Will this mod cut the top speed ?

LiPo Power
04-05-2011, 09:26 AM
If any, it will let you do turns full speed....



I have a Kintec offset coming this week. Will this mod cut the top speed ?

Grimracer
04-07-2011, 04:23 PM
Looking at this pic (just trying to help)

The ride pad needs to be DEAD FLAT! Sand it if you have to..

The sponson back needs to be sharp as you can get it. Add filler if you have to. (if you look at the light highlight on the boat you can clearly see this has a round edge.

The start of the ride pad should (or its best) have a sharp break and not a radii. I have not had a chance to look at this all the close on the model so take that for what its worth.

Happy Boating

Grimracer

Darin Jordan
04-07-2011, 08:40 PM
If you guys look at my race-prep thread for this boat, you'll see that I did what Mike is highlighting on mine. You need to "blueprint" the sponsons... you can't rely on the Chinese fiberglass guys to do it for you! ;)

It's pretty easy to do... just get some filler and do a little sanding. Check out my thread, and you'll see some tricks to getting the edges sharpened in pretty simple fashion.

fallensk8man89
04-08-2011, 01:16 AM
thanx mike and darin.... yea but that paint is so beautiful..... lol. but im just gonna go ahead and do it i really want this boat to be a runner as much as a looker!!!

Darin Jordan
04-08-2011, 07:12 AM
thanx mike and darin.... yea but that paint is so beautiful..... lol. but im just gonna go ahead and do it i really want this boat to be a runner as much as a looker!!!

Keep this in mind... if someone is seeing the bottom... you've got bigger issues than the paint!! ;)

After I got mine done, I carefully masked it off and painted the ride-pads glossy white, and then block sanded that lightly to square the edges back up. Looks really good, actually...

fallensk8man89
04-08-2011, 09:23 PM
Keep this in mind... if someone is seeing the bottom... you've got bigger issues than the paint!! ;)

After I got mine done, I carefully masked it off and painted the ride-pads glossy white, and then block sanded that lightly to square the edges back up. Looks really good, actually...

there was be a reason you design boats hahaha. thats a good idea ill haveta try that white would look good

Smoothops
04-19-2011, 05:57 PM
Trying to get all my needs before the MG comes in 2 weeks. I looked all over trying to find the offset rudder v.2. Can someone help me with a link?

JPriami
04-19-2011, 06:04 PM
KintecRacing.com

Or make your own. I did.

toyotatruckin
04-20-2011, 01:39 AM
I also sell a similar kit-sorry no shopping cart gotta call or e-mail.
http://www.aircapitolhobbies.com/Miss_Geico.html