Feigao 540XL in UL-1 !

[ncornacchi]

Now, here is the hot setup.....a Nue 1515/1Y/S, Castle Creations 240LV, 4S, dual water pickup rudder, JW .078" wire drive..Grim 40x57/3, under-propped again (having a real hard time understanding and choosing the right prop) Cavatates at first, then when she hooks up, look out, starts dancing and chine walking...i'm going to air dam her today and eagle tree the speed...BTW, the dual water pickups are amazing,,after running hard and soft for full duration of 5400mAh batteries, the esc and motor aren't even warm to the touch...i think i hit a home run on the rudder setup.....

[ncornacchi]

now this is an even better setup: Nue 1515/1Y/S, 4S, CC 240LV, JW .078" wire drive (I'll never go flex again), custom dual water pickup, under-propped again with a 40x57/3 Grim (still don't know what to use for a prop)..I think I hit a home-run with the dual water rudder design, when i run this hard and soft for full duration of 5400mAh, the motor and ESC aren't even warm to the touch..Today I will be installing an air dam and the eagle tree to check speeds

[ncornacchi]

Sorry, same boat, double post....

[detox]

Try the new ABC 1518 3 blade prop or ABC S-15 2 blade prop then hold on. You will need to add more weight in front of the hull to reduce chine walk.


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[Jeff Wohlt]

If that is a Etti 2mm coupler it could slip. Did oyu get that from me? It looks differnt than an Etti. . A person can rough the wire up a bit to help but let me know if it does and I will get you something else.

Just check the wire and see if it is shiney after running some laps and that will tell you. You really do not need the twin thrust bearing on that. It could be causing some drag for you at the strut.

Nice friggin ride buddy!

[Fluid]

BTW, the dual water pickups are amazing,,after running hard and soft for full duration of 5400mAh batteries, the esc and motor aren't even warm to the touch...i think i hit a home run on the rudder setup.....

Actually your motor and ESC are cool because you are under-propped and the boat is running so loose. All the rudder does is supply water (which is pretty cold this time of year); it does not take much to cool a motor pulling low amps. With a larger prop and warm pond water your results may vary.

BTW, the thrust bearing on the strut is a bad idea. First, because it is larger than the strut it will cause a lot of drag and prop cavitation. Even worse, when the flex cable winds up it shortens, putting the whole cable in a bind adding drag and eventually pulling the strut out of alignment. Take the thrust at the motor mount and be certain to leave a gap equal to the cable diameter between the drive dog and the strut.



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[Diesel6401]

Here is my UL1 with a 540 7XL, Etti 150, JW wire drive, custom dual water pickup rudder a friend makes for me. Boat is under-propped, running a grim 40x57

What's your strut depth on this setup?

[Brushless55]

[QUO?

Here is my UL1 with a 540 7XL, Etti 150, JW wire drive, custom dual water pickup rudder a friend makes for me. Boat is under-propped, running a grim 40x57

you think the boat is under propped with the 40x57?
what are you going to try next, and have you put a gps in it to see how fast?

[Diesel6401]

Try the new ABC 1518 3 blade prop or ABC S-15 2 blade prop then hold on. You will need to add more weight in front of the hull to reduce chine walk.

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You had a AoA build thread a little while back to help reduce the chine walk. I did the battery splaying mod that properchopper mentioned to my ul. It really reduced the chine walk, but speed really suffered. I am going to have to figure something out with the 7xl because the chine walk is only going to get worse.

[Jeff Wohlt]

He is running a wire drive. Contraction is virtually nothing. I still leave 1/8" in mine at the strut.

[Diesel6401]

I set the strut depth to 1 1/16" and strut angle is neutral as possible. Too much? I will be using 2x 2s and 2x 4s lipo's with a 40x57/3. I'm thinking I may need to come down a little bit for the lighter 2s and maybe more depth for the 4s's, is this proper thinking?

[detox]

I have ran as much as 1 3/16" strut depth . Works well with everything. Reread your UL-1 instruction manual...IT HAS LOTS OF VALUABLE INFO.

[Diesel6401]

I have ran as much as 1 3/16" strut depth . Works well with everything. Reread your UL-1 instruction manual...IT HAS LOTS OF VALUABLE INFO.

Yea I ran pretty deep with the stock set-up before. I just can't wait till get this thing in the water and start testing.

[Brushless55]

Yea I ran pretty deep with the stock set-up before. I just can't wait till get this thing in the water and start testing.

I can't wait either man!

[ncornacchi]

Try the new ABC 1518 3 blade prop or ABC S-15 2 blade prop:: Thanks Detox, I'll grab these props and hope to get them tuned by Egneg. I also had written in my notes from this past winters posts were the 2047 or the M448...I'm still a newbie and still don't understand the whole prop setup dia/pitch/cupping magic....wish there were a simple comparison chart