How To Distinguish Low, Med, high Lift Props Fast Electric RC Boat Propeller Identification 

I have been running rc boats and watching rc videos on RU-vid for years. I just learned more useful information from your channel in 3 minutes than I've learned from all the other boat videos I've watched. Thank you.

Awesome video and explaining some of the differences on the hi and low lift props.

That was great. It's one thing to have knowledge but quite another to effectively share it with others. Well done.

After watching all your Blackjack 24 videos and seeing all the fun you've been having with it convinced me to order one.

Very informative video,who knew there was so much to know about props,but it all makes sense,great job.

Big B! Ive learned more from your vids than any other channel ive watched since gettin into boats last month! Keep turnin em out n ill keep watchin!!

Beg pardon. I didnt watch further beyond the break before my first comment. Keep it up! Im learning a bunch as i have recently subscribed.

Another great informative video. Keep them coming!

thanks for explaining this in detail

Great video! Thank you for this! Great info.

*Thank you for sharing this great video! 👍👍👍*

great video. lots of good info

Thanks bro. That’s alot of great info along with actual run footage. I think I need to pick up a few props and test them like you did , under controlled platform in same water condition s

thankyou this has puzzled me for years

Excellent video bro 👏

Love the new intro

Thanks for the vid !

Thank you very much.

Well done cheers, I thought I knew my props😂

From my past. My first real Hydro was was the Dumas , Drag N' Fly 20. IT was basically an experiment from beginning to end. THE DIRECTIONS were basically worthless after the initial build, and didn't even specify prop ( suggestions) , or prop depth or angle. AS built, we guessed, and we were wrong. THE boat , ran raked up, and was was too high, and sponson to thrust was only 1 and quarter inches,. ALL it did was bound up, and cavitate. Garbage. Next season, we broke the epoxy , and lowered the stuffing tube to almost 1 and 3 quarters of an inch. The boat planed, but still cavitated. THE people at the hobby shop. couldn't figure out what to do. Part of it was trying to figure out THE CORRECT prop . Submerged, or surface running. Bigger , or smaller diameter. IN the end, we settled on an Octura 1440. The Boat ran for about 3 years, and after the fiasco of up grading the Mill to a K& B 3.5 inboard, it never ran consistently after wards . WHEN the motor ran, it was a quick ride, close to 30. IT"S one boat, I wish , I had kept. IT would have been a good performer on electric. I have video from our second season, if any one would like to see it in action. Back to your videos. Stellar. AND , great explanation on prop dynamics. Have you run any of the Prather props? Thanks again , for your great videos.

You also need to compare some of the Octura 3 blade props on the mono, remember to reduce prop size by around 10% going from 2 blade sizes to 3 blade props to reduce the extra load & higher temps with 3 blades.

Awesome video this. Always run octura M442 on my mono hulls with great results and hardly any cavitation. Got me wanting to experiment now tho. Rebuilding my sr80 atm after trashing it on first outing trying to self right it on 6s with a 3s each side of hull after modifying it internally over a year ago. Also waiting for the Reedy v2 s2 to hit the shops end of this month apparently as all out of stock in the grey and teal everywhere here in the uk as yours is a beast 😂. Take a look at my SR80 build on my post before I trashed it if you get a moment. She be back but keep it at 5s as it was better balanced and would self right with a 2s on the opposite side. Keep up the good work mate. Knowledge is key and hard to find in this hobby 😊👍

Hi buddy! Great video, we need information on these things out ! I’m not sure that everyone defines “prop lift” in the same way. Some (including me) refer to lift as the lift produced by the prop, effectivly acting as transom lift. Lifting the transom will have the bow / front of the boat come down, thereby reversing your L/M/H classification. Also, i believe bigger props will always create more lift on the transom, effectively bringing the front down. Imagine having only two forces acting on the boat: One force would be the water acting on lifting the bow, second force would be the prop lifting the transom (high lift props lift the transom a lot, low lift props not so much). Then it’s all about how much or how little those forces are relative to each other, resulting angle the boat sits at. The different batteries used in your test have very different weights i assume. It would be cool to see more tests running the excat same packs and CG. Keep up your great work. Cheers 🌊🚀

Hey iron clad rc Appreciate your response thank you Opened up the collet with mini grinder fixed the problem next question is what steering sevro should I use on my TFL pursuit boat appreciate your response.

Do you have a video talking about cleaver vs chopper props? Love the channel!!!!!

You well and truly buried that thing, surprised you didn't crack the joint. 🤣👍👍

Awesome video. Big thumbs up! Do you ever run a three blade prop?

how did you measure thier pitch?

What prop do I need for top end for a black jack boat. Thanks iron clad love the you tube videos 👍

Great video I have a RC speed boat old have for years , I can't find propellers two props this size can you help? Diameter 36.4mm shaft with a tooth cut 2.8mm diameter Thanks

I think a way to measure torque would be helpful.

So what prop would be the most stabilized for a traxxas catamaran boat the M41? Fast but keep the nose down. I would be running straight 6s only.

A prop with a wider cone angle would create more stern lift. Think of the thrust cone angle as a up and down force vector. The down force acts against the water. As the vector is more perpendicular (wider), you get that force reaction back up from the water. Equal and opposite reaction. If the vector is at a 45 degree, you are not getting the same reaction up, as the thrust is on an angle. The force vector up is not met by the same water on the down vector, and you dont have the same opposite force as you do on the down side. You end up getting a larger force vector up on the bottom side than the down force created by the top side vector. Hence you have a lifting force up. The faster your hull goes, the more force you will have acting on the hull creating lift. More lift, the less drag from displaced hull. Speed is a function of prop size and pitch which will create the least amount of slip. Too small and you cant get enough thrust and you may cavitate. Too large and you cant get enough rpms. Same with pitch high and low. So its a balance act. The theoretical best running angle will be 3.5-4.5 degrees. So you want you hull balance at speed to be running between 3.5-4.5 degrees. Different props can change this angle. So adding stern lift or bow lift for example. Cupping creates bow lift. You may be seeing different total hull lift more based on the prop diameter and pitch reaching more rpms with less slip, and that creating your hull lift. You would need to get something that can measure RPM of the motors at the top speed to tune your diameter and pitch. The prop lift is determined on thrust cone angle. Wider gives stern lift, narrower usually creates bow lift. You can flare out the end of the hubs to create lift as well.

Ciao! Scusami se ti disturbo. Ma secondo te, quali meglio, di plastica, rame oppure alluminio? Tuo consiglio per favore! Grazie

Where do you get a new prop ? I also need a top cover cabin for my udi005

coooooooooooool

I'm using Udi1008 Gallop, any recommendation which propeller is best for mine?

Hi guys I am new to this hobby I have a joysway Alfa they recommend using 6s 5000 .50c packs can anyone recommend some good solid packs to use it's a minefield ?? Thanks guys

If the shaft uses a 4mm size, can it use a 4.76mm shaft diameter propeller? Thank you 🙏..

Can u get me a link I have an alpharev r308 and I can’t find a propeller that will fit it and find the right propeller to have it faster top end just need it to be 5mph faster if u see this can u help me

Are this the cheap Zeee Lipos from amazon? Would you reommend them for boats?

Your not in Colorado are you? Just getting into rc race boats, where is the best place to buy the octora props like that 448 👍

GOOD VIDDIO. I ALWAYS LIKE THEM. INFORMATIVE. DID YOU DAMAGE YOUR BOAT WHEN YOU CHRASHED THE SHORE. THE HOCKEY SOCK TAPE ON AMAZON LOOKS THE SAME AS THE STUFF YOU USE. IT"S CHEEP

Where can I buy a mold to cast propellers

Hello, please recommend me a propeller for the TFL F1 Caudwell tunnel boat, I have a 2960 motor with 1900kv and a 36mm propeller, pitch 1.9 The problem is that there is not enough power, the boat takes a long time to get out of the water. I ordered a 2968 / 3400kv motor and now I need to choose the propeller size and its pitch. I'm looking forward to your advice, thanks!

hey big B im considering a 3blade for my sonicwake 36 but im not sure if its left handed or right can help how i tell on that thanks

What's the difference between aluminum, brass,copper, radium

Will any prop fit on a Traxxas spartan boat

I put on a Hot Racing prop and trim tabs ,there’s a delay in the throttle ,so I went and put everything back to stock now no more delay any of you Pro boaters have any ideas ,on a M41 Traxxas cheers.

Hello sir... im new to boats. Im curently building an old graupner f1 boat with a inboard setup.. leopard 3674 2650kv 4s battery.. boat is about 70cm long and running weight is about 2.4kg... can you suggest a starting prop for a fast acceleration and stable boat.. would like about 60 miles.. what abc prop should i start with.. 2 blade 42 1.6 pitch and high rake... hope you can help me out kind regards René from denmark

kirim ke indonesia mister propelernya 😁

"It's like the Need for Speed," Until you run out of lake. Our Local boat club is using a man -made lake, and with odd dimensions. Maybe a half a mile in the sweet spot. A boat , running around 30 MPH. , runs out of realistate , pretty quick. AT 45, it's over fast. We've run M41's and a Miss Geigo, and they are clocking in +50. I'm still trying to figure out, how you managed 63, on the Black Jack 24.... and kept in the water. A guy dropped a Velos 29 once , and was right at 50. I think he was running 6 S, and stock , for the rest. THX, again for your great video work.

What exactly is a lifting prop? What does it lift?

I spent 50 bucks on a CNC prop and the factory plastic one out performs it

You need to make sure that you’re using the same types of batteries in every way for proper testing you went from using a 50 C battery to using a a 80c battery there’s going to be a significant difference in performance regardless of prop you could use the same prop and have different performance using a different sea rating. This video is useless.

I love this channel BigB your growing by testing and floating us a solid 👌 oh by the way 11:00 blaming the radio was so funny... I meant to do that would also have worked for a laugh 🤩🧑‍🦽BB