Update on my pursuit

[kwiktsi]

Well, finally got my boat all situated with the new motor (Leopard 4082 1600), 1 piece flex, Swordfish ESC, etc. and got to run it some more the last couple of days. Well, on 6S the boat is damn near as fast as it was with the Feigao 12XL on 8S. I tried 8S today just to see as the electrics can handle it, well it turns out the hull can't :D. First time hitting full throttle on a pass launched the boat pretty far into the air causing it to land and hit the water harder than I have personally ever witnessed before. It then skipped back out and landed hitting the water the second hardest I have ever witnessed before lol. The second landing had that "nothing on the inside is attached anymore" sound to it and the boat was dead in the water. Retrieved it and found that pretty much everything on the inside had broken free- motor mount, stuffing tube, steering servo, ESC tray- everything but the batteries which are just velcroed to the bottom of the hull .

On the plus side, it gave me the chance to laser cut some rails for the motor mount, stuff tube support and ESC tray, which as flimsy as the bottom of this boat was, should stiffen it up quite a bit. I have been wanting to do this for some time, but didn't want to go through the hassle of removing the original motor mount- if only I had known it was as easy as smacking it into the water at 60+ lol.

Going to take some work on the bottom, there are a lot of cracks in the gel coat that don't show in the pics, but at least it survived the impact for the most part.

[srislash]

That is a small mono for them speeds.Having a hard time with my 35"DF too up in them numbers.

[Mulisha]

What timing do you run with your SF? Do set to a number or just use low/high or auto?

[srislash]

I would go medium timing or 11 to 15 degrees

[kwiktsi]

As said above- medium is about right. I am at 12 right now, but only made that one pass with it. The ESC was set to auto prior to this.

And, yes, it is too small for these speeds . This boat always did pretty well with the speed of the Feigao even on 8S, but the Leopard on 8S is just way too much for it. 6S is about the max it can safely handle and even that takes throttle control to keep it stable.

[Mulisha]

How did it run on auto i have similar motor/esc but in cat

[kwiktsi]

How did it run on auto i have similar motor/esc but in cat

It ran very well, but I have not run it aside from the 20 seconds it took to trash it the other day since locking the timing . I am hoping to take it out for a bit today, so I'll have more feedback on it. Keep in mind though, this is a new setup in this boat which has very few runs on it so far, so I don't have a lot to compare changes to yet.

[kwiktsi]

Finished installing the motor mount assembly and made/installed a new servo mount as the last one pretty much exploded from the impact. The bottom is much more rigid now!

[lenny]

Hey,
This is the first time I saw this post you made.
So did you get any video of the water disassembly mod ?
Also I like the new mounts,
Where are you setting the cells in the hull with that setup ?
I was going to run 5s today with the 4074 1800kv an see how the setup and hull like it.
My cell or cells are sitting just about where your esc is,
And my esc is sitting on the port side of the motor.

[kwiktsi]

Thanks! I should have taken a pic of it prior to cleaning it out. Basically, all it took to remove the motor, ESC and servo was to loosen the collet and unplug it all lol. The batteries are still just velcroed to the hull. I was going to make trays but they would have gotten in the way of the motor mount screws in the sides of the rails and I would not have had access to them. The batteries go basically flush with the end of the velcro, just in front of the steering servo. It rode too wet for my liking with the batts up front, way too much weight up front. I have been running the ESC in front of the motor and batts on the side pretty much from the start about 5 years ago or so. Performs much better like that, IMHO. I'm sure if you read around here a bit, I have seen other posts stating that the CG is way off with the stock battery location.

I think you'll like it on 5S with that motor :). The 4082 1600 is pretty damn fast on 6S and uncontrollable on 8! What prop are you running with your setup?

[lenny]

I am using a some modded props m445 and a m447,
Also I will try a x447/3 and see how the setup like it today.
Thanks for the info on the stock cells location,
I just may be looking to do a setup location like yours than.

[Peter A]

I was just wondering if you guys race oval with your Pursuits or just blast them flat out on flat water? Mine (in my album) has a 3665 1800kv motor, T120, X437/3 and 4S 5000 65c nano, or 2x 2S 5000 40c turnigy packs. Doing 40mph which is ok because I am keeping it P-ltd (well our equivalent in NZ, E-ltd). What I found yesterday in a bit of chop and breeze is that I had to slide the battery forward a little to keep it stable, otherwise it would just blow over,it floats really well upside down! It just seems the bigger motor are overkill in this hull, or does the extra weight of 2P setups help with stability?

[Peter A]

PS dont mean to hijack thread.

[kwiktsi]

I don't race, only run for fun. I run dual 3S packs in series and have used from 3700's to 5000's and have yet to have a blowover with this boat, even in fairly rough water (6"+ waves). I have had it roll several times on me in rougher conditions though. The biggest stability issue I have with it as it sits now is chine walking. It really gets rocking with the new setup but the boat does run pretty loose and doesn't have much hull at all in the water at speed, so some CG and stinger adjustments may help that, haven't messed with it yet.

[lenny]

Hey I like good info,
I like running in chop and on glass for testing.
Do you have any pictures of your setup or video's ?

I just do sport running.
And like testing and modding setups for better handling and speeds to,
I ran my pursuit last night on one Great hobbies TGHL rated at 3-5c 5s 35c 3800mah pack.
And I ran a x447/3 for the first time,
It gps at 47.6 and had 7 minutes of run time and it handle nice with X447/3 prop and 5s.
Low volt was set at 3.4 and kicked in and the packs cells read 3.75 and took 3265mah to charge back up,
These packs where 10s that I split in to 5s packs.
I picked these 8s and 10s packs up at Great hobbies and was not sure if they where any good at the time,
Temps where 120f caps , 100f Esc , 110f Motor , Cell 100f, I have some video but it a little dark.
Next time out I will get some good stuff.

PS dont mean to hijack thread.