P1 kos 35" offset rudder.

[lenny]

Hi,
Has anybody tried making the rudder offset on the p1 kos 35"?
And if so, Does it help the boat a lot or not ? http://forums.offshoreelectrics.com/...-Offset-Rudder
I am doing some mods to run the boat on 4s2p 25c to 35c 5800mah on each side of the motor,
With stock motor,esc, and hardware and a x640 prop.
I will also add some turns fins to,
I have not ran the boat yet, So am not sure how well they run with stock rudder setup inline.

Thanks for any help or info.

Lenny D

[tlandauer]

Hi Lenny,
I plan to run for the second time tomorrow if everything goes well. My first run was cut short by a bad coupler, I didn't notice any major issues with handling, both right and left turns are within my expectation , I know each person has different expectation. I don't race so I have no need to up grade. One thing I did notice is that the transom is not flat, it curves and it would be hard for me to put an offset rudder. I ran 3s with a X642, it was very smooth, the prop bites right away. The stock 3 blade prop was just awful. I plan to run a X640 tomorrow. I will pit a Seaking 120A ESC and then run 4s. I am a bit concerned about the stock ESC dealing with 4s. That is just me... ofcourse.

[lenny]

The stock esc is really a 60amp seaking and should good to 6s,
But 5s I think would be tops, And the stock motor will handle 4s.
That stock motor on 5s would not last to long, So I hear.
The rudder I was thinking of this, But on the right side.lol
http://forums.offshoreelectrics.com/...-Offset-Rudder

[lenny]

How where your temps with the x642 and what cells c & mah where using ?
And how much run time did you get ?

I am just about rtr to,
Just need one bolt and thumb nut to make my water proof hatch seal,
And test for leaks wednesday I think.

TTYL.

[tlandauer]

My Temp was all good, the longest run I made w/o opening the hatch to check was about 5 min. The ESC's temp was 110* and the motor a bit warmer, 129* . ( wish a bit lower but this was running full tilt) I used Sky Lipo 5000 mAh, 40 C, 3s. I got at least 7 min.+ with 33% Capacity left after checking the battery with Hyperion EOS Sentry. The batt. temp was 90*
I had wanted to connect two of these batteries in a parallel way to increase runtime, alas, the ESC won't arm for some reason, I posted a question in the "Battery&Chargers" thread but have yet to receice any advice.

[lenny]

I hear the outrunners motors can run at 200 f and be ok,
But with a water cooled motor mount the temps should be better and help the motor to.

I did not see any post for help there,

When you tried to arm, Was your tx on ?
You may need to rebind tx to rx and calibrate the throttle and reset your esc again.

[tlandauer]

Thanks, I posted under " Charger, Battery talk, info and question", title is " Need Help to Understand Deans Parallel Plug", Yes, I binded the Rx and Tx, the ESC arms as soon as I plug in with the regular way, i.e. one single battery. I don't even have to do this, but the fact that it is not working really bugs me, but I thinik maybe this is too silly, nobody gives a hoot so therfore no answer. well, it is good to hear that these out runners can sustain a higher temp.

[tlandauer]

OK, I GPS'ed 3s with x642, it is only 29mph, then with 4s , running with x640, speed picked up to 41 mph!, that is a 12 mile jump. I used the stock ESC, temp was good, 90* ESC, motor was same, these are 2 min. runs. The stinger is in neg. setting----- the bottom of the bracket is lined up with 4+ hence the stinger is pointing down.

[lenny]

Was it running wet ?
I think the setup likes the amps from the 4s cells,
Temps are good with the x640 on 4s, Try the x642 and check temps.
The deans you should ditch, And go with 5.5 bullets,
It may give better power and run cooler to.
I was going to start at 0 at the stinger and see what it does,
Same with trim tabs.

[tlandauer]

Hi, it is not running wet, infact I had to lower it to get rid of the poiposing. Didn't have time to try x642, will do next time.
Thanks for your advice, I am actually using 5.5 mm plug on 4s configuration. Its when I was running with 3s , my battery already has Deans. I made an adaptor so I can use Deans. There is correct voltage coming out on all sides of the plugs.anyway, now that I am running 4s, I will not use Deans. By the way, my trim tab is set at neutral .

[tlandauer]

It was windy today, but I wanted to try the x642, it worked very well, I don't think the difference is really that noticeable , the hull does have chine walk, I ajusted a bit the stinger, but all in all because of the windy situation I can't tell too much. The ESC stayed cool, upper 90* , motor is warmer than x640, like 120*, these are 3 min. runs.
Did you by any chance try your P1 yet?
Best, Tim

[lenny]

Hi Tim,
No I did not run yet, Tomorrow for sure I will test.
Did you put turn fins on your boat yet ?
I hear this boat likes choppy water, Is that what you where running in today with the winds ?
You said chine walk, Do you mean like a death wobble at top speed ?
If so, May be trim tabs down some would help.
But you will lose some speed to,
But it will handle better and should not flip to easy like that.

[tlandauer]

Hi Lenny,
The seller had installed turn fins and I assume they are the micro sized ones from OSE, they work really well for turns, no spin out! Yes, the wind was strong, medium chops, the boat could handle that w/o problem. My chine walk happens at top speed just as you said, the front of the boat reminds me of a Cobra snake. However, she doesn't come close to flipping, I also noticed the rudder bracket is not mounted 100% perpendicular to the V bottom, these being RTRs, production variance. So the in-line rudder is creating some sort of disturbance, IMO. Your idea of an off-set rudder will help. BTY, same thing on my Miss Geico, with the Kintec off-set, the boat tracks as if on rails, the stock one has chine walk even on that Cat hull, at least mine.---This is another topic.
Have a great time tomorrow!

[lenny]

Ran today,
Not running bad, But I think I will need some turn fins.
I reversed the stock trim tap turn fin to see if that would help any,
But I do not think it did,
The stock turn fin trim tab is adding to much drag I think.
I may try it with out them and see what happens with temps speed.
But with the 3s cell back some I think it help with the turns and did not slide out much.
Windy and some chop but looked like it was running good at top speed on 4s2p and ran once on 3s with cell back some.
4 minute on 4s2p with a x640 prop, Temps where a little high at first and I moved cells back some.
Temps, 95 f cells, 160 f esc caps and 135 f esc, 175 f motor.
No gps today, Just testing the setup,
All and all I think it ran a little wet today but stable at top speeds and fun.

[tlandauer]

Sounds pretty good to me!
Do you have the newer version Turnfin/tabs, I bought the new P1 a month or so ago- never ran but meanwhile I got a used one here and have been running the used one instead! I was curious as to how they worked, I was thinking reversing them as well.
Did you modify your battery placement? Remember you saying placing them on both sides of the motor.
Good that you don't have chine walk, I am going to ajust the tabs per your suggestions.