Quick Air Dam Idea Blackjack 42, Two Shapes Tested - Speed Run Tips FE Rc Boat

[@55steviegreene]

AiR Dam . Battery Looks like a loaf of bread. Love the videos

[@IRONCLADRC]

Lol, yea it did looks even more odd now that the puff has subsided.

[@79ltd]

Really cool of you to post this. I think you are working on the cure for the inherent issue with this boat, width and too much air being trapped underneath. Looking at these runs there is no porposing at all so you've fixed that by squaring the hull and proper set up. No more warpage. Now it's air management. As you have stated. If you like to tinker, this is the boat for you. It's why I bought it. Anyone can stick batteries in a Zonda and go 100 +. This boat makes you think and your sharing is really appreciated by us who ate less

[@79ltd]

Who are less creative, not ate less. LOL

[@richardlmcgee707]

I think you're doing great that's how things got faster in the first place with people experimenting with things that you are doing faster and faster buddy

[@joshbsz]

Can we get a video with all just full trigger cuts!!! The Big B Trademark phrase is the best!! Thanks again brother for all the setup tips, picked up a blackjack 24 and have started modding it. I haven't had a boat in years & figured it's time to switch it up from my go fast cars.

[@quadpop4643]

Cool channel bro my adoptive grandparents lived in Jacksonville when I was a kid back in the 80s

[@VetteWay2Fast]

Interesting and appreciate the testing to eliminate the blow overs. Maybe an rc car wing on the top in front to create some downforce when speed picks up?

[@SteveLane61]

Really interesting experiment Big B, thanks for going to the trouble to test out the idea. Seems to make quite a difference. Looking forward to seeing the next stage of the air dam 😉👍

[@IRONCLADRC]

The square one actually did pretty good I took it out again yesterday evening with no blow Overs.

[@Buellerwtfman]

Good stuff man. Hope I get to stop by some time and make some runs with ya.

[@paintendaveextremecollisio8057]

Going to try this on mine BJ 42 Great Video today👍 hope the wife is cool about the lipo puffing .

[@IRONCLADRC]

She doesn't know yet I'm a scared to tell her lol. 👊 🤜 🤛

[@paintendaveextremecollisio8057]

@@IRONCLADRC lol did it puff because of the timing? Or? She will be fine…..

[@casconie]

i am NOT a rc boat owner as yet but i watch ALL your videos for sum tuning, creativeness & ideas for rc modding. i will own a bill oxidean 42 or 45 RTR very soon to add to my rc stockpile. stay safe mr ironclad rc. 👏

[@VetteWay2Fast]

Funny im now trying stuff like this on the bj24. So tough to keep it down over 80. Put an rc car wing in the front and going to try it soon lol. May try a piece of square foam if that doesn’t work (guessing the added drag is gonna be tough to overcome)

[@nealstarling5422]

note to self: do not click on the links in the foreign language… oh hey BigB yep just love watching your videos. I do believe your onto something with that smaller square shape, it seams to defuse the air flow in the proper amount. As one of your subs pointed out to me, we are looking for lower pressure under the boat. So in my humble opinion- bring the blunt front end to a more downward point creating a little down force from the top, keep that square defuser underneath in the tunnel “1 or so more forward 🤔 or not, seams to have worked where you put it (intuitiveness is you super power) I believe you will have your self a race capable rc boat

[@georgegonzalez9281]

Yeah, what's up with the porn trolls in the comments - KZbin is so trashy!

[@IRONCLADRC]

I've reported every "scam comment" I ca t catch them all I apologize pleas report spam comments

[@stevestonacek7128]

Good one "B" I just got the BJ 42 it's still in the box no time to unpack. Owning a boat shop conflicts with hobby time and the fact it's been over 105 deg every weekend this summer puts a damper on things. I have been watching videos for the last year on this boat I have wondered if some kind of air dam might help this blow over problem so when I get this boat unboxed I will try something like this on the BJ42. I have had a little problem with the Miss Geico 36 blowing over into the wind but I think that most of the problem with it getting the cg right. Most 6S packs won't fit forward under the deck but I found some Tindling 5200 120c packs on Amazon that fit under the deck and will allow me to move the CG forward a bit. The air dam might be helpful as well. I have got to get some testing time here soon. Hope this heat wave ends soon 45 days over 100 as of today it's tough on a old guy like me. I watch all of your boat videos and love them all. Boat Gang Baby.

[@Artimus55]

at 12:21 a fish jumps in the lower left hand corner.....lol

[@User3eighty4]

I did this the day it came out. You can see me mention it on the horizon hobby website. I ended up running lead tire weights 4 inches back and 8s3p 27ah packs. 74mph with an octura 545 I modded about 15 years ago.

[@IRONCLADRC]

Did the air dam help with keeping the boat on the water? 74 mph awesome 👌 glad I could help!

[@User3eighty4]

@@IRONCLADRC hard to say as I’m sure you’ve noticed. Sometimes it runs amazing sometimes it just wants to blow over. An air dam has usually fixed my cats blow over issues. This one not so much. This would easily be my favorite boat if it ran good. I love the size.

[@jared6072]

This is pretty cool. Its got me wondering if taping different foam shapes to the front of the boat to manage air would change anything. I mean compaired to other cats that have a nice sharp leading edge, this one is just flat. There could be a pure symetrical one, one that curves down and flip it around to curve up. Im just getting started with tuning my bj42. Just got the rcbitz goodies and looking forward to getting that mid speed porposing out along with the random blow over. Lovin these vids that show what works and what doesnt.

[@dimalranasinghe8152]

Thank you very much.

[@mikehamilton7697]

Cool idea man

[@georgegonzalez9281]

Very interesting video Big B! You ventured upon uncharted territory with this stuff. How about making some sort of rail system where you can install the air dam and be able to slide it forward or further back and then lock it into whatever position works. There I go - over complicating things again. Thanks for getting the wheels in my head spinning this morning :)

[@IRONCLADRC]

Yes sir a rail system would be a great idea 💡 along as the air dam stays flat I think it's a great idea. The foam was a spur of the moment deal, giving guys something to ponder

[@peteroosterhoff8850]

Just wondering... when you changed strut height, there is no comparison anymore i would think. Youre not able to adjust strut angle so is stays planted..? I don't have this boat, but got myself a small cat a few weaks ago . Put a 5mm wedge under first (front) step on a flat table, then push strut flat on table and tighten it. Then tested cg a bit and was spot on in just 2 runs....

[@IRONCLADRC]

Yes sir I get the same effect by moving the strut position, she's been running great.. personally my boat doesn't need the air dam I was trying to inspire & give ideas for others who are experiencing extremely high speed blow Overs with catamaran & or hydroplanes.

[@peteroosterhoff8850]

@@IRONCLADRC I think a blow-over is always a risk with speeds above 60mph and finding the sweet spot. The more the boat runs light, the more speed and the more risk... Don't believe disrupting an air flow is a solution but needs to be adressed in the setup. But, nice off you to try those things out. Keep on boating...

[@hoodatdare7039]

GOOD MORNING BIG B. JUST A THOUGHT WHAT ABOUT SMALLER AJUSTABEL TRIM TABS ON THE FRONT OF THE HULL BETWEEN THE SPONSONS. IS THAT TO OUTSIDE THE BOX?

[@mildtowildrc7343]

I make adjustable wings on the front of the tunnel hulls and been thinking of the same concept for this boat😏

[@IRONCLADRC]

Now that's an idea. I actually like this one. 👌 thanks hoodat

[@VetteWay2Fast]

I’m confused. What would tabs on the front do? Can you elaborate?

[@JR-ew6ek]

Can you please do an update video on the overall best setup and want your current BJ42 is set up as? I just got one, and would love to see a summary of overall best mods. Thanks!

[@IRONCLADRC]

Roger that, try to get to it sometime this week

[@simonjandrell5897]

always wondered the cause when a battery goes like that (like a balloon) its also freaky to look at..

[@flopackrc5452]

What about a wing on the rear putting down force on front ?

[@IRONCLADRC]

Yea if could work they use the. on hydroplanes to help lift the rear end

[@scottconnors7901]

Use your duel rates to turn your steering down, it's to much and not needed. Keep up the great work.

[@IRONCLADRC]

Thanks brother.

[@matthewwilken2051]

may i suggest disrupting the air flow over the top also. ive had alot of luck using things like windshield wiper bubble packing for air dams i've also run them from front to back along each side sponson.....like a runner sled

[@IRONCLADRC]

Thanks for the info I'll definitely keep that it in mind. Great idea

[@chriscraft3126]

Great idea B big!! I enjoy watching all your test videos. Only have the swv2 but you have saved me so much time trying to tune that thing in! Random question where do you buy those 3d printed prop stands? Was gonna make one but those are amazing that you have!

[@IRONCLADRC]

Email Rob he custom 3d prints them to order [e-mail]

[@rodneyrasmussen1199]

^^^^dito on that remark

[@larygrassmeier4980]

My new boat has EC8 connectors,do i have too buy batteries w/EC6 conn. and then solder on the EC8s? Thanks,Lary

[@IRONCLADRC]

Yes sir, you may have e to go that route. Some battery vendors will solder your choice of connector on for a small fee or possibly free

[@larygrassmeier4980]

Thanks bud!

[@raymondkelly4065]

I'm having trouble getting the nose to stay down on my mg36 so I'm going to try that on mine what is the square one measurements it looks like 1/2×1/2

[@IRONCLADRC]

It's actually more like 1/4 inch. I don't think the 36 will need 1/2 inch 1/4 should do it maybe a little thinner? Good luck brother other

[@raymondkelly4065]

@@IRONCLADRC okay thanks I'll let you know how it goes

[@99ville]

Where do I get the square damn from

[@IRONCLADRC]

It's just a peace of foam trimmed to size

[@99ville]

@@IRONCLADRC like a pool noodle?

[@InterstateremovalsAuFurniture]

Until you try an RC boat you can NOT understand how much fun they are. My mate and I brought a couple of boats and honestly I didn't think we would love it as much as we did.... I dont know why exactly but the RC boats have something that pushes the fun level to the extreme. Try it... What do you fellas think?

[@IRONCLADRC]

I agree 100000% any time your on the water it's a good day.

[@paulocapelo]

I know this is not a cienific test, and what you did is very useful, but it seams that with the square foam you didn't run against the wind as faster as you did with the round one. Just saying.

[@jaycevessier7554]

That’s why I don’t run my high rake props much, they create so much heat, even more than my 3 blade props

[@dana2750]

I love the R&D but wouldn’t just changing the strut angle a bit to run the boat a little more “Wet” accomplish the same thing. I see the point of the adjustable airfoil on a hydroplane but never seen anything on a real tunnel hull/Catamaran style boat. Someone should design a servo controlled strut that could be adjusted on the fly with a 3rd channel. Basically adjustable trim like a real boat has.

[@IRONCLADRC]

Yes adjusting the strut will keep the bow down to a certain extent/ speed if your experiencing HIGH SPEED Flips the the air dam could be a game changer

Hi