New to VTOL

[mandrin13]

OKay,I just read this forum,and got interested in VTOLs.But first i have some questions.
1st What is a gyro,and where do i get one?

I would lke to build an EDF VTOL . How would i control the turn of the EDFs?

I am pretty sure that i will have a hard time trying to get this to go from hover to airplane mode.

More questions to come.

thanx

I have flown rc before

I just said that,because everytime i post something people ask if ive ever flown RC before.

[MustangAce17]

ok, here goes. A vtol is very complex and takes lots of time and money to design,test,and fly. I originally started my thread on the GWS Islander bash with the intent of finding a way to not use any gyros but i was very wrong. A gyro is a device that keeps different controls level. My vtol has them on yaw(rudder usually but motors on mine) and ailerons. Ived had to replace my servos a few times since during testing the wingtips which they were mounted on stuck the ground and busted the gears and my lhs canot get gear sets for the hs-56 servos. Good luck and you picked the right place to post since their are a lot of incredibly talented peple in this forum to help you to a sucessful flight.

[Osprey WannaB]

Yes yes yes... I my self have realised that a vtol project needs lots of money...one thing i don't have:D.. but yes as Mustang said a gyro keeps diffrent controls level..
eg. stop two mottors/servos from over powering the other and can make them move equaly.. am i right?
Good Luck,
Jamie

[MustangAce17]

Jamie, i think thats right i know it moves my yaw servos back to center when they get off track and also does the same with ailerons. Goodnight

[mandrin13]

K thanx,but where can i get one?whats a go0od price?

[MustangAce17]

i'm using the GWS PG-03 gyros since they are very cheap around $35 and are light at 9 grams. I got mine through my local hobby shop but tower hobbies is the place to order them yourself. A major thing to decide is whether you want to use an existing airframe and modify it like i did or scratch build one like Tumbler had done. When i got into my project,i knew absolutely nothing about these type of aircraft except how to fly the Oprey v22 on my simulator(g2 add-on 5). Through the months of my project i have changed things but kept the same basic principle in mind and it has flown a few times until the servos stripped recently. be careful in your equipment choice since it is very vital in the final set-up and how the crafdt will control. As soon as i can get new servos, ill test mine somemore and post results in my thread. A good source for the counter-rotaing props i use is Todd's Models(www.toddsmodels.com) and they are 10x4.5. Goodluck and let us know how its going

[v22chap]

Mandrian13
Welcome to VTOL's ,,all the advise given is good.

A couple guys have mounted the fans right direct to the arm of the controlling servo or you can use a carbon tube to keep the weight of the servo in the center and or to be able to use just one servo instead of two for the tilt process....the design is up to what you want to do.

With the mounting right direct you can only pivot the fans through about 60 degrees .... if you use a center servo it could be a retract servo that would give you the full 90 degrees ...but it has been proven that 60 degrees is enough to do fast forward flight and most people can't tell it is only 60 degrees from that far away.
Good luck and keep us posted
Larry

[Tuner]

And off course you have the Hitech 59995TG servo with 180 degrees of rotation and enought torque to rip a finger off.
That said these servos cost $130 and require their own power source seperate of reciever or you will have problems.

Just to give you a heads up I have watched $2500 go like the wind in testing my design. I have the money just no time something else that is required :)

Good luck Im doing this because helis and airplane are not so fun for me anymore kinda boring so I though Yah VTOL and UAV's should be a challenge.

Scott

[mandrin13]

Well i have read a lot about vtols and it sounds like no one has been able to gat there VTOL to go from hover to flying.

I thought that you could get to do it by hovering at about 10+ feet,and then you could try going into a shallow dive,and if it gets enough lift then it should be able to fly, right.

I am thinking of a delta wing EDF model.

Could I make it out of depron,or EPP?

Any good websites on were to get parts would help.

thanx

[v22chap]

I have got mine to go part way into airplane mode ,,far enough that I could turn off the heli cyclic and still fly... but there is a lot involved to get that far.... 10 ' high and then go for it isn't going to work as you loose a lot of altitude in the conversion unless you have a really light and overpowered bird ...which just is almost impossible to do.

You can build it out of depron ...but with the amount of strain on things in conversion I would think that it might be best to try balsa first ,but it all depends on what you want to do... that is the problem with VTOL's there just hasn't been that much done on them yet.
Ducted fans (especially electrics )just don't seem to have the power to weight ratio that is needed to do VTOL ,,,,most that do fan types do a ducted airplane prop. Now Robert Gorhamn did a twin ducted fan that did the full conversion ,,but he was using high powered .60 ducted fans and a light weight tube frame.
If I was just starting ,,I would try to build one that someone else has done and then try to imporve on it ....like the one that VTOLman did ,,,he has given all the specs to it and the list of build materials ,,,and a short search of the net for hobby shops that supply these should be pretty easy.
Here is the url to his thread.
Vtol mans bulild thread (http://www.rcgroups.com/forums/showthread.php?t=440470&highlight=VTOLman)

And this page of the build gives the parts ,,,about half way down the page.

VTOlmans build parts (http://www.rcgroups.com/forums/showthread.php?t=440470&page=6&pp=15&highlight=VTOLman)

And it is not to expensive ..
Good luck
Larry

[joao]

You might find it interesting:

http://www.vstol.org/wheel/wheel.htm

With Depron+Lipos, VTOLs are now more feasible :)

Best of luck with the projects
João

[mandrin13]

I thnk I will try an ultralight foamy EDF.

[joao]

EDF... I´m afraid that´s the hard way as Larry said (thanks for the link to Vtolman !).
I´m going try to build this type of bird soon and I´m going for 2 or 3 big open props, (11x4,7 GWS with 7:1 GWS brushed drive or similar) Lipos, Depron tape, and carbon. Light balsa would be great too but might be a tad fragile during the flight tests ;)

Regards, João

[mandrin13]

How about a delta wing model.Can you put wings like an airplane on a dela.I dontt know how to explain it.But I think it might work.