- Видео 67
- Просмотров 553 553
bjofuruh
Добавлен 3 янв 2007
RC Autogyro Panther
This is my Panther autogyro.
It has been somewhat modified from the original drawings:
* Rotor blades are hinged
* Rotor diameter increased to 144 cm
* Larger tail
* Longer front fuselage
* Increased weight
It has been somewhat modified from the original drawings:
* Rotor blades are hinged
* Rotor diameter increased to 144 cm
* Larger tail
* Longer front fuselage
* Increased weight
Просмотров: 254
Видео
RC canard plane on-the-rocks
Просмотров 4946 месяцев назад
My self designed RC canard plane Wingspan: 275 cm, weight: 6650 g.
Small Homemade Hydrofoil Boat
Просмотров 19 тыс.Год назад
First trials of a small homemade hydrofoil boat. The engine could not be run at more than 2/3 power because it was mounted too high. One can clearly see propeller spray, indicating the propeller runs too high in the water. Therefore the top speed could not yet be determined, but at around 2/3 power, it reached 21 km/h. More testing to be done after modification of transom.
RC Sailboat and a plane
Просмотров 106Год назад
Homemade RC sailboat, mainly built from model airplane left over materials. Roughly same dimensions as IOM sailboats. The plane is an Albatross from Hobby King.
Cierva C30 RC Autogyro from Astik
Просмотров 881Год назад
This is the Cierva C30 Autogyro from Astik. It is very easy and pleasant to fly. The video is shot on quite a windy day, surface winds are about 4-5 m/s, but gusting 10 m/s at altitude. The rotor is easily spun up to take off rpm by the wind alone.
Investigation into airflow separation of an R/C plane
Просмотров 244Год назад
Investigation into airflow separation of an R/C plane. The plane: 31% semi-scale model of the MC-30 Luciole by M. Colomban. The wing has a lower aspect ratio than the original. Otherwise, it is close to the full-scale plane. The wings and tail surfaces are equipped with wool tufts to visualize the airflow. The wing has no geometric washout, but it features drooped leading edge at the wing tips....
MC 30 R/C
Просмотров 86Год назад
This is a self-made Colomban MC 30 R/C semi-scale model. Ving span: 221 cm Length: 170 cm Weight: 4860 g Motor: Turnigy G60-300 Controller: 50A Battery: 6S-4500-35C Propeller: 18x10
Rainbow Autogyro RC
Просмотров 2,9 тыс.Год назад
This is the Rainbow RC Autogyro. Easy to fly with a full stabilization gyro.
R/C Flying Wing - Tailless Aircraft
Просмотров 4302 года назад
The BF-31 is a tailless aircraft. Self designed, but inspired by the ultralight Mitchell Wing B-10. Airfoil used is the MH81, designed for slow flying tailless aircraft. Wing Span: 2.75m Wing Area: 113 dm2 Flying Weight: 4.8 kg Filmed by myself with a helmet mounted camera. Therefore quite shaky video :(
Lett MC - øvingskjøring.
Просмотров 3,7 тыс.2 года назад
Denne videoen viser privat øvingskjøring til MC-lappen A1. Denne videoen er ikke ment som en guide for hvordan en skal øvingskjøre, men den viser hvordan vi har gjort det, kanskje kan noen plukke opp noen tips? Eller kanskje noen ser opplagte feil som vi gjør?
Grumman Albatross 1:14 Scale R/C
Просмотров 2073 года назад
Grumman Albatross 1:14 Scale. Wing span: 213 cm Scratch built from Ivan Pettigrew drawings
Emily, the happy snowdog
Просмотров 773 года назад
Emily is a happy mittelspitz. She enjoys playing in the snow. No need for costly ski lifts and prepared ski tracks.
Skipper in the skies - with a surprise ending
Просмотров 1,1 тыс.5 лет назад
Skipper XL and Dragonfly (same as Skipper) on water. No fish were harmed during the making of this movie. Unlucky photo-plane: FX-79 Buffalo, highly modified.
R/C Spitfire MK IX Floatplane
Просмотров 6795 лет назад
This is my 3D-Lab, 3D-printed Spitfire Mk IX, modified as a Spitfire Mk IX Floatplane.
R/C Flying Wing (...or Tailless Aircraft)
Просмотров 6467 лет назад
R/C Flying Wing (...or Tailless Aircraft)
Flying Wing (...or tailless aircraft...)
Просмотров 1,4 тыс.7 лет назад
Flying Wing (...or tailless aircraft...)
Well done Sir !!!
How's she work in rain and snow .
Looks amazing. Thanks for showing your beautiful build. This should totally go on Grin Techonolgies Project Gallery
Слишком здоровенные крылья.
lovely
Nydelig båt! Første du har laga? Løysingane såg utrulig gjenom tenkte ut.
Big fuel savings & way faster.
Cool design great to watch, as a point of interest the pusher set up seem to produce more noise.
A pusher prop will make more noise than a tractor prop, but it helps to use a low kV motor and large propeller to keep the RPM down, tip speed velocity should be well below 500 km/h. It also helps to keep the plane as aerodynamically clean as possible in front of the propeller.
Have you compared the efficiency or speed differences between using the same engine in a conventional boat versus a hydrofoil?
10kmh normal vs. 23kmh hydrofoil
6650 grams and floating like that? Have you invented an anti-gravity generator? Tell us your secret!
The secret is: Total wing area: 132dm2 Wing loading: 50 g/dm2 🎈 Slowest possible speed: 32 km/h (no stall due to canard) Max lift coefficient: 1.02 So, no magic, only physics.
@@bjofuruh That wing area is huge, didn't realize that. Thanks for the info!
Front and rear drive propellors?
The front propeller is driven by an electric motor. The main rotor is free spinning (wind milling).
First Panther I've seen fly off snow, great job and nicely flown
Birds only have their tails at the aft because their eyes need to be at the front😂
Birds don`t have propellers either.
@@bjofuruh if their wings don't propel them, then what does?
Seven words that make algorithms love You.
congratulations..... simple and it works
Does it turn?
Yes! It can turn at full speed. Not shown here because the aileron mechanism was not yet fully adjusted, so it was still a bit unstable in roll.
Wow I can fire myself. Tell the boss to shove his job.
Spooky microphone sounds😮 What dwells beneath?😅
Good day. This is the best DIY hydrofoil boat I've come across on the internet so far. I have had the idea of building such a boat myself for a long time. Could I ask you some details about your boat? For example, what airfoil did you use for the hydrofoils, what angle of the hydrofoils to the fuselage do you have, etc. Thank you for your reply and your time. Sorry for my english but I use google translate.
I use the good old versatile Clark Y airfoil for the hydrofoils. It works great at these low Reynolds number. Angle of attack is between zero and one degree positive measured along the underside of the hydrofoil. They must be adjustable so you can find the exact angle for your speed and weight.
And can I ask for at least the approximate width and length of the wings? Thank you@@bjofuruh
@@MrBrumla The area of the rear foils are: 0.090 m², The front foil is 0.035 m². That gives a total hydrofoil area of: 0.215 m² Rear foils: 0.90 x 0.10 m Front foil: 0.50 x 0.07 m The all up gross weight is: 136 kg.
@@bjofuruh If I calculate my weight, the weight of the engine and the fuel, then in these items alone I will reach about 120 kg. My engine is a 6hp Yamaha 6DM 2 stroke, 2 cylinder. If I am very handy, I will manage to make the boat up to approx. 80 kg in weight. So the total weight will be approx. 200-220 kg. I am wondering if the dimensions of the underwater wings as you wrote to me will be enough, or if it would be better to increase the dimensions in percentage terms.
@@MrBrumla I previously had a heavier boat with a 5 HP engine and the same hydrofoils. It had an all-up weight of 167 kg. The top speed was 32 km/h. I think you can size up the hydrofoils to get the same wing loading as I had with this heavier boat. It worked great, and with 6 HP it may be fast.
That is awesome!
Very cool! I am working on a similar project at University this year and would love to gain some insight from you if possible!
Love it. Hope you can share more.
Nicely done
Is there a damping/preload mechanism or some kind on the ailerons? What kind of waves can it take before a feedback loop persists? Super neat I applaude your wonderful efforts 👍
Ingenious ❤ it.
Hat off. You did a lot of work
Fred Marks CoPilot, nicely done!
Amazingly neat project! Such a nice, clean design and build. I'm looking forward to a (hopefully coming) follow up video! (Among other things) I'm curious about the performance of the thing with the engine mounted at the right height! Also, what is the (approx) take-off speed? Edit: I work with fluid mechanics at Technical University of Denmark, and hydrofoil boats are one of my side-projects. I have developed a simulation tool that should be able to handle hydrofoil setup performance (including first order spray and surface effects), and one of the setups we have simulated is a lot like what you have built: depth control on front, rear left and rear right side. It would be really fun to try to simulate your setup. One of my longer-term goals with my hydrofoil student projects would be to build and test hydrofoil setups using some sort of test-vehicle. Yours looks very nice indeed. If you have time and find it interesting I'd like to get in touch with you over email and/or skype. My email is macg@dtu.dk
This is the best thing I've seen today.
Wow very impressive. A flipsky motor and a flying rodeo prop with a VESC would make a very nice combination to make it electric
Lovely front strut setup. The leading skimmer works well. I'm very impressed with your pushrod controls slotted through the anti-ventilation fences. Well done.
👍👍👍！😲
How did you calculate the size of the foils as well as the balance?
I made a spreadsheet with all variable parameters for the boat, so I could calculate weight, weight distribution, lift, drag, engine power and so on. If you are interested in designing your own, you should purchase Ray Vellingas book on hydrofoil design.
@@bjofuruh Ray's book is the key!
Very cool! That looks like the Pacific Northwest. Impressive speed for a 3.5 hp!
Super cool! How does it behave when going through small waves?
I will comment on that when I have gone through some waves.
@@bjofuruh have you gone through some waves?
Very impressive build! Is there any way I can contact you?
Great video and Velomobile, any plans available?
How much was the cost + work hours?
Is this you own construction or did you bought is somewhere - and when true, where?
Go to: www.icare-rc.com/rainbow.htm
It really slices through the water nicely. I have been waiting on my plans but they were sent USPS which means that they were delivered to the Peruvian mail system. When that happens it usually means 6 months to never before I receive mail.
I do not understand how you turned. Did the whole aft end turn? Is that a shock absorber that I see for raising and lowering?
The motor shaft rotates in the aft end of the kayak and is steered by cables that goes to the joystick. The aft end is raised and lowered by an electric actuator.
Ankle bender 😜
Thank you for sharing and for including so much footage of you driving it. That's very helpful and most videos don't include it.
Wonderful! Amazing creation! What are its maximum measures? Did you do two different models (the yellow and the blue) or are they the same with modifications?
har vært der før
Trym???
@@LarsenMoto det er meg jq
Wow, what a great design! What's the total weight and cost and are there any unsolved issues left? Is a front trunk superior to a rear trunk (weight distribution etc.?)
Nice job!
Upload whole process, i.e how you made this amazing flying machine.
Go to: www.icare-rc.com/rainbow.htm
I think there would definitely be a market for this product....It looks like velomobiles in the EU are > $12,000....Need to take the cost out and make it an E- bike. Cyclists here want to be able to cycle in inclement weather and are willing to pay. It would be good to have a little heater in the bike. Perhaps place a flywheel to have regenerative braking.
how did you do the mechanics :-) did you use a original trike and build this stuff around it?
Var det lett å lage