ML Boatworks RSX380 Outrigger! My first FE wood kit build...

[785boats]

The c.o.g. is right at the turn fin trailing edge.

Hmmn, I setup up three drive modes, each with differing dual rates, 100%, 75% & 50%. Suppose I should try them, huh? Forgot about using them and it wasn't a problem running slower...

Please recommend Octura props in the X or M series that compares in size to what I'm running now. It's a ABC 2018-10-50(2)-CLL. And why to use them? They don't list their rake angles, so I didn't buy any.

Thank you for all your help...

Here it is, balanced on a spare boom tube...

The rake angle on the Octura X & M series is 10 degrees. The same as your ABC prop you have listed above.
However. Your 2018-10-50 has a pitch ratio of 1.8. That's a lot of pitch.
I would be inclined to say, that is most probably the cause of your tail hop and prop torque steering issue.

A pitch ratio of 1.4 or 1.6 would be more stable than 1.8

The 17 series prop you have ordered will have less lift. But what diameter & pitch did you order?

I find that it is best to have the bottom of strut level with the table when both front & rear sponsons are sitting flat on the table.
That puts it horizontal with the waterline when on the plane.

Just my thoughts on the matter. However I run the RSX310 not the 380.

Cheers.

[sammyha]

don,t those octura x series props have more pitch than your 2018 abc ?

I don't think so. At least not total pitch

Sent from my SM-G950U1 using Tapatalk

[rol243]

woops, my boo. i meant the octura has less pitch than that abc prop.

[sammyha]

The rake angle on the Octura X & M series is 10 degrees. The same as your ABC prop you have listed above.
However. Your 2018-10-50 has a pitch ratio of 1.8. That's a lot of pitch.
I would be inclined to say, that is most probably the cause of your tail hop and prop torque steering issue.

A pitch ratio of 1.4 or 1.6 would be more stable than 1.8

The 17 series prop you have ordered will have less lift. But what diameter & pitch did you order?

Cheers.

I just received a ABC 2015-17-45 & 2016-17-45 prop.

And since I placed the order before you commented back, I also got a 1819 & 1917 prop. Both are ABC props in the 17-45 series.

Better to try more props than less I say. And I also plan on doing SAW runs later, so one of them might be The Prop...

Sent from my SM-G950U1 using Tapatalk

[sammyha]

I find that it is best to have the bottom of strut level with the table when both front & rear sponsons are sitting flat on the table.
That puts it horizontal with the waterline when on the plane.

Just my thoughts on the matter. However I run the RSX310 not the 380.

Cheers.

Yeah, that's where I started off the bench. I plan on going back to that with these props. It ran on rails there, so probably both the RSX380 & the RSX310 have similar design characteristics.

Also, it took a long time to warm up here. The lipos run so much stronger above 75 degrees or so. I may have changed my trim settings too soon. Should have just waited for warmer weather, the speed would have came.

I'll be testing more soon...

Sent from my SM-G950U1 using Tapatalk

[rol243]

you can buy cheap lipo heater bags or place your lipos on the car floor and turn on the heater as you drive to the lake.

[sammyha]

Got out again for a SAW run and some laps. And used steering dual rates. Got lucky and nailed it at 50% on the first attempt. At least it's right with this setup and running on glass.

Sure is nice cranking the wheel all the way and knowing it's gonna carve the turn...

https://youtu.be/ytlN5A1DhCc

Sent from my SM-G950U1 using Tapatalk

[sammyha]

So, before I received feedback here on props, I had ordered a ABC 1820-22-45(2)-CLL, because that was the only higher rake prop OSE had in stock at the time. And I was wanting to try a higher rake prop.

I had it prepped, so that's what I ran in my latest video. And I set the strut level with the rear shoes with a slight positive angle (.010). So basically back to a bench tune.

I came close to matching my top speed (81.4mph) on the SAW run.

Then I ran laps with the goal of figuring out steering dual rates. With 50% dual rate it made what looks like right the size turn. And I ran close to the right size laps for heat racing (I've paced 230' off on shore, crude I know, but gives me some reference anyway).

Here's my question... What speed should this rigger run on laps on 8s? My GPS showed 67.9mph on fairly consistent speeds on the straights and turns...

Sent from my SM-G950U1 using Tapatalk

[Peter A]

In race water if you can keep those speeds and not wipe out you would be doing well. There is a big difference between running approximate laps on your own, and racing around bouys with 5 other boats. It brings a totally different dynamic. in oval racing having the fastest boat doesn't mean you will win!

[sammyha]

In race water if you can keep those speeds and not wipe out you would be doing well. There is a big difference between running approximate laps on your own, and racing around bouys with 5 other boats. It brings a totally different dynamic. in oval racing having the fastest boat doesn't mean you will win!

I can believe that. It's tough enough with my limited experience at these speeds to lay down uniform laps. I was just curious to how my setup is running. I've watched some racing videos, looks crazy. Thanks

Sent from my SM-G950U1 using Tapatalk

[rol243]

with the best prop set up i would think you should average around 70 mph with the 8s rigger. also set up for saw with the best prop should give you 100 mph providing you also have a good run up lake.

[sammyha]

with the best prop set up i would think you should average around 70 mph with the 8s rigger. also set up for saw with the best prop should give you 100 mph providing you also have a good run up lake.

Thanks for the feedback... Whew! From what I've seen so far, those are pretty impressive numbers. At the same time, I've seen how much difference the setup makes.

That's exactly what I was wondering. Laps and SAW runs. It takes time and effort to test setups. I need to get after it, our season is short...

Sent from my SM-G950U1 using Tapatalk

[sammyha]

For the record I want to note that all but one of the runs I've made on this rigger is posted on YouTube. So I only have about a half a dozen runs or so on it. It's been a busy summer for me with overtime at work and projects at home.

The only run not posted was of a day I ran all three of my boats, and I had my head cam tilted down and filmed nothing but water... [emoji2955]

I say this as a testimony to the quality of Mike's design. Lazer cut kits. And all the details he spends time on to get right before releasing it.

It has no bad habits...

Sent from my SM-G950U1 using Tapatalk

[rol243]

just like any boat hull being mono to outrigger hydro, they all need fine tuning so maximum performance is gained and this does take time.

[vvviivvv]

Any updates on this?

Just read it fully and contemplating one for some left over 6s equipment... more would be a sport setup with a quick prop change to SAW capabilities... just undecided on this or trying to package in the smaller boat a 6s setup.