Threw a Grim 42x55 on my MG. Here is some video!!

[Diesel6401]

M445 Detounged x445. Loosens up the load on the motor to allow for higher rpm.

X642 More pitch (increased load on the motor) and lifts the back of the hull up. Not a great choice for a cat IMO.

The x642's worked wonders on the BJ, but for this hull the less pitch the better. I'm running a grim 40x52/3 with a PB1800kv (stiletto motor) and the stock mg/bj 45amp esc.

[tiqueman]

The x642's worked wonders on the BJ, but for this hull the less pitch the better. I'm running a grim 40x52/3 with a PB1800kv (stiletto motor) and the stock mg/bj 45amp esc.

642 was amazing on the BJ26. Ive also had better luck w/ the 4 series on the MG.

[Diesel6401]

642 was amazing on the BJ26. Ive also had better luck w/ the 4 series on the MG.

Yea on the mg def 1.4 pitch on the mg is better. I tried a x440/3 but the hub wouldn't fit on the Drive dog, so I traded wizard for his grim 40x52/3 while we where at the pond. Same damn dimensions as the 440/3 but his hub was opened so it fit and I rolled with it.

[JackBlack26]

Thank you Alan and tiqueman for the input on the bouncing hull. I will try and adjust the strut as suggested. Honestly, I don't want to offset the rudder if I can fit the bouncing otherwise.

I marked the GOG on the battery trays at 9" from the rear of the boat as the manual suggests, then I marked the trays from there in 1/4" increments. I also marked the center of my batteries so everything matches up.

What is the "cob"? Is that Center Of Boat? Is that what I described above? 1/4 off the back of the tray sounds understandable but I don't know if our batteries measure the same. My Flightmax LiPos measure 5 5/8" long.

Diesel, I see you're running the PB 1800KV motor with the stock ESC. I just ordered a Castle 1512 1800kv before they run out. Do you think I can run that with the stock ESC, or should I ask, do you recommend it? I plan on getting a Hydra 120 for that motor but if I don't need to, I rather get some more LiPos with that mula!

[Diesel6401]

Thank you Alan and tiqueman for the input on the bouncing hull. I will try and adjust the strut as suggested. Honestly, I don't want to offset the rudder if I can fit the bouncing otherwise.

I marked the GOG on the battery trays at 9" from the rear of the boat as the manual suggests, then I marked the trays from there in 1/4" increments. I also marked the center of my batteries so everything matches up.

What is the "cob"? Is that Center Of Boat? Is that what I described above? 1/4 off the back of the tray sounds understandable but I don't know if our batteries measure the same. My Flightmax LiPos measure 5 5/8" long.

Diesel, I see you're running the PB 1800KV motor with the stock ESC. I just ordered a Castle 1512 1800kv before they run out. Do you think I can run that with the stock ESC, or should I ask, do you recommend it? I plan on getting a Hydra 120 for that motor but if I don't need to, I rather get some more LiPos with that mula!

CoB = Center of Balance, I work in aviation so we always say CG or CoG. Center of Gravity same thing. Usually 28% - 30% measure from the transom. Example MG is listed at 30" so 30 x .28 = 8.4" 30x .30= 9" measure from the transom forward. Just a good starting point. Now what you want to do is measure from the sponson tip to the end of the sponson not including the transom extension where the hardware is located so that number is prob going to be different. That was JUST a example! So your 9" is actually to far and needs to come aft some.

Naw don't do that. Get a new esc, save your money buy a swordfish 120 steve sells or for a few more bucks the swordfish 200 would be better. That CC will def blow that 45 amp esc IMO. I have that motor and I'm not even brave enough to try that one. I wouldn't even recommend using the PB1800kv on that 45amp esc. I have had the PB45amp esc before and have a spare pb45 amp laying around so I'm just pushing/testing the limits. I'm imagine a fail will happen, I'm just curious on how much pushing I can do. I plan on getting a Stiletto one of these days and the 60amp pb esc will go into the MG and i'll stick a bigger esc in that stiletto and run the 1512 1800 cc i have in it. I got the plans just need the boat, anyone want to buy me a Christmas Present

[tiqueman]

COB, center of balance. Easiest found by puting the boat on the end of a table w/ the transom hanging off just slightly. Slide the boat off teh table until it starts to tip to fall off. Slide back and forth accordingly so it just barely stays on the table and the slightest tap to the back downward will cause it to try and fall off. thats your COB, or COG... whatever you prefer to call it. (center of balance, center of gravity)

9" is way too far forward for stock speeds.

[JackBlack26]

Thanks for the explanation. See, I read the instructions and still managed to get to wrong


Thanks for that formula, Diesel.

Tiqueman, I'll try and do the balancing trick with the boat and see how far off the instructions are. So that's probably why she's still bouncing then, huh?.

So the Swordfish ESC in recommended over the Castle Hydra 120? Looks like the Turnigy 60A one. What kind of failure rate have you guys heard of with the Swordfish?

[tiqueman]

Thanks for the explanation. See, I read the instructions and still managed to get to wrong


Thanks for that formula, Diesel.

Tiqueman, I'll try and do the balancing trick with the boat and see how far off the instructions are. So that's probably why she's still bouncing then, huh?.

So the Swordfish ESC in recommended over the Castle Hydra 120? Looks like the Turnigy 60A one. What kind of failure rate have you guys heard of with the Swordfish?

Id say that and it could also be your strut, but I dont remember if you mentioned where its set.

Dont know about the Swordfish, From what i read quite often, the castle issue w/ popping on plug in kinda scares me... some will argue, "yeah but for the customer service blah blah blah..." All I can say is Ive become I diehard Turnigy fan. I love mine. And if someday it does go poof, Ill spend the 40 or 50 bux and get a new one...

[Diesel6401]

Id say that and it could also be your strut, but I dont remember if you mentioned where its set.

Dont know about the Swordfish, From what i read quite often, the castle issue w/ popping on plug in kinda scares me... some will argue, "yeah but for the customer service blah blah blah..." All I can say is Ive become I diehard Turnigy fan. I love mine. And if someday it does go poof, Ill spend the 40 or 50 bux and get a new one...

I agree, I am a hobbywing seaking (turnigy marine) guy, have had great luck at a great value and the seaking 180s are AMAZING. I won't and don't plan on buying a hydra esc ever really. And that's just me. I have had great success and fun with the seaking's. As far as the Hifei swordfish esc's I have had 2 of them. First one I killed when my ul1 split open and started sinking which was not the esc's fault. 2nd one I got smart and waterproofed it and added a extra cap and had great success with it then I sold it. I even ran a 540 7xl on it with great success. So choice is your's as always, but don't expect to see a hydra 120 in a Diesel boat anytime soon, now this CC Ice esc's maybe a different story . My twin HOTR cat im fixing up will run twin seaking 120s!