Very well done! The final motor "test" is done at the flying field: the motor should not get hot. A little warm is OK, but not hot. If the motor runs hot, you must reduce the diameter/pitch of the prop so that the motor turns at a higher RPM and draws less current. This is especially important if you don't know the wattage rating of the motor.
@konoacda9935
2 жыл бұрын
Man you are awesome. All this people online are always trying to make it as complicated as possible which is pointless for a beginner like myself. I be asking simple questions which you have discussed and asnwerd delcuintly in this video, and the answer I always get from people online is "It depends" and they start explaining way too complicated stuff for me which drives me crazy I just want a simple answer! Awesome video thanks!
@bobmabel8543
4 ай бұрын
Hi Simon, I really appreciate this video. Fairly new to RC and have an ambition to start building my own planes. I'm familiar with design principles and techniques re airframe but the power side (electric) is a mystery to me. What you've demonstrated here is a massive help. Thanks!
@SimonWebbRCandModellingChannel
4 ай бұрын
So glad you found this video helpful. Thanks for your comment! 😊👍
@russc3288
9 ай бұрын
Excellent presentation and without a doubt one of the easiest to follow and use in real life plane set ups.
@SimonWebbRCandModellingChannel
9 ай бұрын
So glad you enjoyed it and gained knowledge from it Russ 👍 Thanks for your comment!
@richardfernandez6770
Жыл бұрын
Simon this is fantastic!!! your level of details is so important in designing your own plane. Absolutely necessary to know abs substantiated with numbers Richard
@Idefix70
2 ай бұрын
Looking forward to part 2 how to select what a 400W out runner is! and what prop to choose. Great explanation in simple to follow steps on how to get your output power. Thanks 🙂
@SimonWebbRCandModellingChannel
2 ай бұрын
I haven't filmed a Part 2, and that information is out there for people to research. A 400w electric motor is one which has the quoted power rating of "400w". My advice would be to choose one with has a slightly higher max power rating. (450w for example) That way you are always within the safe maximum. For prop choice, you need to connect a watt meter to see what is "going on" numerically with the chosen load you have put on your motor.
@mikeonb4c
23 күн бұрын
Nicely presented and very helpful. I think reference should have been made to choosing the right C rating for your Lipo battery and I think also there could have been discussion about prop sizes and which to go for. This last point, along with choosing the best motor KV rating, crucially links to how you want the plane to fly (big draggy slow scale biplane, STOL plane, 3D plane, high speed plane, electric glider etc as each has different needs)
@SimonWebbRCandModellingChannel
23 күн бұрын
Thanks Mike - Yes I knew when I filmed it I didn't touch on everything. I can expand on this video soon to give more guidance on watt meter use, prop selection and so on. 👍👍
@mikeonb4c
23 күн бұрын
@@SimonWebbRCandModellingChannel You could always do a quick addendum video and link to it in comments. Your overall presentation was very good and helpful so it would add to its value. My particular challenge is converting a 10lb weight 72" span slowish flying Tiger Moth biplane to electric. I probably want a low KV motor driving a big prop (scale diameter suggests 15"). 6S 5000mah lipo I suspect. I'm busy mugging up on what I'll need to be buying!
@SimonWebbRCandModellingChannel
23 күн бұрын
@@mikeonb4c Yes I will sort something out! At least with your Tiger Moth you have 2 wings to cope with the ballast of 5000mah capacity. I think a low revving low kv motor and a bigger prop would suit the Tiger Moth, and it would behave much more "scale" like in the air. The real aircraft engine wasn't revvy and it plodded about the sky. The model should do the same with sensible electronics selection.
@mikeonb4c
23 күн бұрын
@@SimonWebbRCandModellingChannel Agree! I'm working on it. Id have loved to fly it with the ASP91 FS it came with but its such a pig to start and fuel leaks every that at 72 I've decided nostalgia is getting less and less important. I just want to be flying! 😆👍
@kingkong60001
Жыл бұрын
well made, well explained. especially for a beginner who wants to design from ground up. keep up the good work. very appreciated!!!
@ESS284
2 ай бұрын
What a fantastic video, answered the niggling doubts, thank you.
@SimonWebbRCandModellingChannel
4 жыл бұрын
Sorry about the flicker - 4 overhead strip lights and the camera are to blame!
@unclebobsbees4899
Жыл бұрын
Brilliant! As a new kid, you answered a ton of my questions.
@SimonWebbRCandModellingChannel
Жыл бұрын
Great stuff I am glad you found my video useful 👍
@chrishard7616
Жыл бұрын
A good intro…… I think you missed mentioning a very important part and that is Pitch Speed. I see a few questions about propeller and KV choice and Pitch Speed must be considered when choosing the motor prop combo. You can have the desired wattage but the model could fly too slowly if the Pitch Speed is insufficient! It’s all about calculating how fast the air speed is coming off the prop.
@SimonWebbRCandModellingChannel
Жыл бұрын
Yes you are right I haven't mentioned everything. This video gives a background to the basics. I have addressed some things in some replies though. I am considering doing a Part 2 of this video because it has garnered such interest.
@kellio48
5 күн бұрын
Nice video and well explained but just a couple of points. When weighing and calculating the overall weight including all components, and while it won't make much difference, you didn't include the weight of the receiver. However, what I'm trying determine, is how to know the optimal motor, ESC, combination size for the weight of an airframe with only battery, servos, pushrods and landing gear included?
@SimonWebbRCandModellingChannel
5 күн бұрын
I included a note on not including the Rx.....but I did increase the power of the motor (which more than covers it). Weigh all your components, determine the performance you require, apply P=I x V and work out each one, as I have done. You will get a good idea from doing this.
@stampatur
Жыл бұрын
Hi, thank you for the Video, it is so informative and inspirational even for those with some experience. It would be ideal to make a spreadsheet with data and formulae using the info you gave for future calculations made easier.........:)
@SimonWebbRCandModellingChannel
Жыл бұрын
You are very welcome Joseph! 👍
@DirtyBob2001
Жыл бұрын
Cool video. The only thing I knew about motor selection was that I don't know anything about motor selection.
@boxlessthinker1973
7 ай бұрын
Thank you for explaining this! Once we add landing gear our kit parts exceed the plane weight. I have wondered about this relationship. What about mixing of brands? Can we pick an esc from company A and a motor from company B? Is this standardized and interchangeable now?
@SimonWebbRCandModellingChannel
7 ай бұрын
I have never paid attention to brands - I always look at the technical specification of the item I am buying.
@desertblbuesman
Жыл бұрын
Thank you very much.. I'm totally new, understand the units and such but just starting to chew on rc applications and loving it.
@BoyzeGames
3 ай бұрын
I love your accent man
@SimonWebbRCandModellingChannel
3 ай бұрын
👍😊
@theeastman9136
8 ай бұрын
Great explanation; that sure helps a newbie like me and I will apply it to the 1/9 scale Spitfire I'm beginning. Thank you. One question though, why do you abbreviate the word "cell" with an S ?
@SimonWebbRCandModellingChannel
8 ай бұрын
That is what the battery companies do!. I asked that question years ago, and never got an answer! The letter "C" is used for the capacity, so maybe they chose the phonetic version "s" for "cell"?!
@robertgoldbornatyout
6 ай бұрын
👍👍👍💯💯💯Excellent presentation and without a doubt one of the easiest to follow and use in real life plane set ups.💯💯💯👍👍👍 I AGREE BEST HELP ON KZitem , THANKS SO MUCH , NEW SUBSCRIBER.
@pbtvproduktionen
4 жыл бұрын
Well done! Keep on RC!
@alanb.4383
2 жыл бұрын
Hi Simon really enjoyed your video. So well explained. Thank you.
@SimonWebbRCandModellingChannel
2 жыл бұрын
Thanks so much Alan for taking the time to comment! So glad you enjoyed it 👍
@RobertStanfordCambridgeUK
Жыл бұрын
You did miss something critical out - Really useful apart from missing the last critical step of finding the correct sized prop i.e. all your components can be correct according to the calculations but if you put too coarser pitch or too bigger prop on you will burn out the esc and or motor. The way I do it (which probably isn't the correct way) is by using the ammeter and running the setup on the bench to make sure that the current is within the rating of the motor and esc if it isn't I fit a finer pitch prop and if that doesn't work drop to a smaller diameter prop. I am sure there must be a better way.
@SimonWebbRCandModellingChannel
Жыл бұрын
Read the comments because I think somewhere I mention the use of Watt Meters.....the video was to show esc batt and motor only.....an update is needed. Thanks for commenting.
@RobertStanfordCambridgeUK
Жыл бұрын
@@SimonWebbRCandModellingChannel Thank you for producing informative and useful videos.
@nevillecreativitymentor
2 ай бұрын
Excellent video ... although you do need to get out of the fllat spin !!!!!!
@SimonWebbRCandModellingChannel
2 ай бұрын
Sorry I don't understand your comment - Please expand!
@Hyperxgaming637
8 ай бұрын
I think so you should add one "okay" counter on the screen 😂😂,but the information is very nice
@SimonWebbRCandModellingChannel
8 ай бұрын
I am just an amateur at it sorry....but glad you enjoyed the content.
@Hyperxgaming637
8 ай бұрын
Really informative thankyou
@NathanHamer-pm4if
Жыл бұрын
Brilliant sir. Thank you!
@williamhoenstine5057
Жыл бұрын
Very well done instructional video. What source did you get the motor watts that you use in the equation(s)?
@SimonWebbRCandModellingChannel
Жыл бұрын
Those values 100w 150w 200w per pound weight of model, were from an article in an RC magazine based on the author's research. I then set about powering the exact same model in each of the 3 power to weight set ups, and was in complete agreement with the author's findings. I should have mentioned this in my video.
@hansverhagen4186
8 ай бұрын
great info. cheers
@geordienufc3132
Жыл бұрын
Excellent explanation. Thanks
@SimonWebbRCandModellingChannel
Жыл бұрын
You are very welcome mate!
@jaybrewer7215
Жыл бұрын
Great JOB !!!!! Thank you very much. Great information.
@tonyjohanningsmeier5597
4 ай бұрын
Do these theories and formula work for Electric Ducted Fan models as well as propeller?
@SimonWebbRCandModellingChannel
4 ай бұрын
I am not experienced in flying ducted fan models, but the P = I x V formula will still apply.
@budmartin8297
3 ай бұрын
As a general rule you will find that ducted fans are less efficient than props, so fans take more power.
@cgcgcg69
Ай бұрын
Thank you 🎉l
@Recovery12Life
Жыл бұрын
Very nice friend thank you.
@mikethomas8445
Жыл бұрын
To a newbie I am totally lost on how to decide what components to purchase for my airframe so I can weigh them ????
@SimonWebbRCandModellingChannel
Жыл бұрын
I mention in the video to go online and find a typical item, and get that weight. So for example if you have a mid sized model, choose a mid-sized motor, a mid-sized ESC etc etc...and get those weights online. I have to say that you are very brave designing things like this if you are a newbie....well done!
@konoacda9935
2 жыл бұрын
Hi so this video is so well done, could you make another one about servos and servo sizes please.
@SimonWebbRCandModellingChannel
2 жыл бұрын
Hi. Glad you enjoyed it. I could make one about servos and servo sizes, but generally I use the rule of get the best you can afford. A nylon geared servo can achieve decent torque but may not last very long. The obvious upgrade is to get a metal geared version. Personally my models have always been "club size" so I haven't actually used larger servos myself, so I feel I am not best qualified to comment about such things. So, in summary get the best servo your budget can afford. 👍
@konoacda9935
2 жыл бұрын
@@SimonWebbRCandModellingChannel well said thank you!
@djmjr77
Жыл бұрын
Where did 175watts per pound come from? Is there some standard of weight to watts? Also how does the size and pitch of the propeller come into play? This vid left me with more questions than answer's..lol
@SimonWebbRCandModellingChannel
Жыл бұрын
I chose that value as an in between 150w and 200w. You can chose ANY value......but 400W per pound will be a bit ridiculous IMO. There have been magazine articles about it all. Play around with it all and see what suits you best. Less than 100w per pound is a slow model IMO. The propeller size is decided with a Watt meter. You need to link up your new design and open the throttle with various propeller sizes. When you reach 80-90% of your motor's max power output rating then stop. If it exceeds it then you are overloading your motor. So you have to experiment.
@SimonWebbRCandModellingChannel
Жыл бұрын
If it has confused you then my advice is forget everything I say in the video.......life is too short!.......lol
@djmjr77
Жыл бұрын
@@SimonWebbRCandModellingChannel sorry, wasn't intending to be harsh. The whole concept interests me. I don't have the experience you do so it make sense I would not understand everything. Thank you for the additional information, that will give me something to research more. Is this concept usable for multi-rotor also? I would think it would be from the power/current requirements but would the watts per pound be different due to vertical take off and landing?
@SimonWebbRCandModellingChannel
Жыл бұрын
@@djmjr77 I don't fly rotors quads or drones so I can't comment on them. Physics won't change but how to select motors and how to monitor loadings and current draw is alien to me where helicopters and their like are concerned. Good luck!
@garyshoell9245
5 ай бұрын
Omg you dont remember where the watt meter, it always goes between the battery and esc. A 45amps is to small and it would be better to be over 20% above 45a
@SimonWebbRCandModellingChannel
5 ай бұрын
You have misunderstood, I meant I don't remember where the Watt Meter is IN MY WORKSHOP!!!!
@daveg5729
Жыл бұрын
That looks like a fun airplane. Are there any plans out there for it?
@SimonWebbRCandModellingChannel
Жыл бұрын
Not that I know of...I think it is an own design by the builder. It flies really well and is shown in flight in one of my recent videos.
@daveg5729
Жыл бұрын
@@SimonWebbRCandModellingChannel - I'll have to find/watch that video. Thanks for the info.
@tarunks4500
Жыл бұрын
Very well explained....Great
@tntv8834
Жыл бұрын
What is the right battery for 1400kv motor 40esc?
@daniellyne9420
Жыл бұрын
Well explained, cheers!
@kamleshchavan7451
Жыл бұрын
Sir have you made the circuit diagram of the ESC
@SimonWebbRCandModellingChannel
Жыл бұрын
No, I just use standard ESCs suitable for the current I have calculated.
@eduardoserrano5453
Жыл бұрын
How about the propeller?
@SimonWebbRCandModellingChannel
Жыл бұрын
Use a Watt Meter and try different sizes . The load of each prop will draw more or less current, and you will see it in real time on the display, but aim for a steeper pitch with a lower revving motor if you can (usually but depends on the model). Also IC sizes..... so if it is a 40 size model try 10 x 6 etc. It needs experimentation, so you don't overload your motor. I might do another video on that actually. Some design models suit low pitch longer props, others vice versa. Personally I like torquey set ups shifting a lot of air with each revolution, so steeper pitch.
@saadasim572
Жыл бұрын
what was 2.2 lb in this?
@SimonWebbRCandModellingChannel
Жыл бұрын
2.2 Ibs in a kilo!
@abbeyuptown-sd4ry
Жыл бұрын
hi, would the power to ratio work for a quad copter ?
@SimonWebbRCandModellingChannel
Жыл бұрын
This is for fixed wing - I don't fly quadcopters!
@petertuccitto9322
Жыл бұрын
How do you choose the size of the propeller?
@SimonWebbRCandModellingChannel
Жыл бұрын
Use a Watt Meter! Scroll down as I have answered this already for somebody.
@shayankumarnag8650
Жыл бұрын
Plz give the relation between kva of motor and battery power
@SimonWebbRCandModellingChannel
Жыл бұрын
Can you be more specific?
@budmartin8297
3 ай бұрын
kva tells you the theoretical rpms of the prop per volt of battery. As you add cells the rpm goes up. you could say that battery power goes up with higher kva, but that's not the point of the kva rating on the motor.
@Labyrnthdom
2 ай бұрын
How is this only 2 servo plane when it has ailerons? Rudder Elevator Ailerons Isn't that 3 servos? Oh, I see it. There is no rudder😅
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