Proboat release new Blackjack 42" catamaran

[UpliFT-RC]

Installed my Dual rudder pick up cooling system on my BJ42.

Day 1 of testing out my new dual cooling system on my #blackjack42.
i have one of these exit water outlets on each side of my boat.

[jhurlbert]

Update

Im running 2 4s 9000mah batteries that weigh 736 grams each. Fully forward with the strut down and i put 70 grams in front of the esc.

I am convinced this boat still is not nearly heavy enough for its size.

At full throttle it still starts to bounce then blows over.

[UpliFT-RC]

For test run # 2 on 6s I had 2oz's up front. For my next test, I am going to put in another 2oz which will equal a total of 4oz's up front including my 4s lipos pushed all the way to the front on each side of the my boat. Also, I am tossing on an Dasboata Sonic2 / X447 Prop and see how she runs today..

[Raydee]

Update

Im running 2 4s 9000mah batteries that weigh 736 grams each. Fully forward with the strut down and i put 70 grams in front of the esc.

I am convinced this boat still is not nearly heavy enough for its size.

At full throttle it still starts to bounce then blows over.

Have you tried moving the strut and a different prop. Sometimes just a prop change will make a big difference.

[alvinm]

I agree. My current setup with stock prop barely bounces. When I changed to a larger prop, it bounced uncontrollably.

[jhurlbert]

Update

Im running 2 4s 9000mah batteries that weigh 736 grams each. Fully forward with the strut down and i put 70 grams in front of the esc.

I am convinced this boat still is not nearly heavy enough for its size.

At full throttle it still starts to bounce then blows over.

So all i had was another 70grams i put in front of the esc. There was a slight chop and some wind but i feel like i am getting close. Still blew over once but almost made a full wot 8s pass

[Raydee]

Really starting to think I may cancel my order with my local shop. I have not seen a single video where this hull stays on the water unless its running 35mph. Really bummed because I really like the hull and power system.

[Peter A]

Really starting to think I may cancel my order with my local shop. I have not seen a single video where this hull stays on the water unless its running 35mph. Really bummed because I really like the hull and power system.

Check out HOTMPBC on Fb. They have a couple running well at speed on the oval.

[Raydee]

Do you have a link, I did a search and it turned up no results.

[Peter A]

Do you have a link, I did a search and it turned up no results.

https://www.facebook.com/groups/330511467426467

[Raydee]

Thanks for the link. Looks like they Def have the hull figured out. Now I feel a little better about keeping my order.

[jhurlbert]

Water conditions were better today not perfect but i was able to do full wide open throttle 8s passes only a little bounce but no blow over. Still going to put another 70-100 more grams in it

[jhurlbert]

Also ever since i damaged my prop shaft and strut bushing after hitting something in the water. I replaced them and now when greasing the bushing slides out of the strut no problem. I don’t think there was any damage to the strut, but it has made the greasing process allot easier. It seems to fit in there nicely like it should with no play or vibration that i can tell

[ACKopter]

Thanks for the link. Looks like they Def have the hull figured out. Now I feel a little better about keeping my order.

Ray, I saw your post in the FB link asking what the secret was in keeping the nose down. I'm not 100% certain but a good starting point is they are using 9000mah batteries. It has been mentioned twice here in this thread that using nose weight might magnify the issue and I personally find this to be true from my own testing. I bought new batts for this boat and am not looking to buy more (9000mah vs the 5000mah I already purchased) so I have some lead sheet that I intend to wrap my 5000mah batteries with to achieve a good balance and remove the nose weight I already have, hopefully solving the issue.

Might be a week or so before I can get it sorted out but I'll let all here know how it goes when I get rountoit.

[Raydee]

I heard those guys are running 9000mah packs and a ton of weight up front. Their boats are def running good and stuck to the water but I can't imagine the damage there is going to be if you blow one over at full speed with all that extra weight. Proboat was so close to having a great boat with this one....maybe the next one will be the ticket? For now I cancelled my order but I am not ruling out buying one in the future.