RC India

RC Models => Multirotors => Topic started by: dheerajramaraju on December 05, 2014, 06:00:00 PM

Title: Who can build a multirotor for given specs and how much it will cost?
Post by: dheerajramaraju on December 05, 2014, 06:00:00 PM
Payload: 5 kgs
Flight Time: 45 - 55 minutes.


Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: allthatido on December 05, 2014, 06:02:11 PM
It will cost you a bomb..that is for sure :p .  You would need U8 motors and 26 inch props and lots of them.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: sooraj.palakkad on December 05, 2014, 06:10:31 PM
5Kg payload and 50Min flight time ???
Can this be called hobby or is it for Military use ? :giggle:
How ever, Allthatido(don't know your real name sir.) is right.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: dheerajramaraju on December 05, 2014, 06:10:52 PM
Let me put this way:

System should be capable of lifting 5 kgs.
Total Flight time should be 45 - 55 minutes with or without payload.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: sooraj.palakkad on December 05, 2014, 06:12:13 PM
is this 5Kg all up weight or just the payload ?

all up wait : means the total weight of aircraft + payload.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: dheerajramaraju on December 05, 2014, 06:13:40 PM
its only payload..
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: RCNeil21 on December 05, 2014, 06:15:26 PM
Whats your budget? Are you already a multicopter pilot?
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: dheerajramaraju on December 05, 2014, 06:17:25 PM
No limit on budget...
Piloting not needed.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: sooraj.palakkad on December 05, 2014, 06:24:46 PM
Well, then I could say it can be done (as you said no limit on budget :thumbsup:)
But what d'you mean by no need of piloting   :headscratch: is this for safe keeping in a shelf after building ? Some one have to fly it one day, isn't it ?
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: dheerajramaraju on December 05, 2014, 06:26:48 PM
Please don't worry about piloting.

Just post average cost, if it can be done...
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: sooraj.palakkad on December 05, 2014, 06:32:42 PM
Here i found this data from RC groups,
http://www.rcgroups.com/forums/showthread.php?t=1372744 (http://www.rcgroups.com/forums/showthread.php?t=1372744)

with some mods on that and may be an Octo, you can definitely achieve that payload carry capacity and flight time.
if you want I can search and find a suitable platform.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: sooraj.palakkad on December 05, 2014, 06:37:05 PM
Rough calculated an AllUp weight of around 10 - 12 Kg.
You could go for an Octacopter for more stability.
So AUW be 12Kg, each motor should provide more than 3Kg Lift.
Let me search.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: RCNeil21 on December 05, 2014, 07:00:16 PM
What is your intended payload? It can definitely be done with limitless budget. Use t-motor electronics, custom made CF frame, some A-spec nano tech batts, cf props ofcourse and a dji a2 or wookong flight controller. I would say around 4-5 lakhs. About $8000+.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: dheerajramaraju on December 05, 2014, 08:58:41 PM
Thats a good price.

How much does it take, for someone to build it and deliver.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: sooraj.palakkad on December 05, 2014, 09:03:24 PM
What is your time frame ?
As 4-5 lacks is a good price for you it's easy to build one.
p.s not my business, still can't wait to ask, what is your purpose with this heavy lifter?

4-5 Lacks is not at all needed if you know where to and how to source parts.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: dheerajramaraju on December 05, 2014, 09:12:08 PM
What time you can deliver?
Purpose is confidential.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: rohan123 on December 05, 2014, 09:22:58 PM
4-5 lacks ,woah thats a nice budget you got!!!
can you share the purpose of building this expensive machine?
and do you want the multirotor to have higher stability or higher motion??
i think this is the thing you are looking for: https://www.youtube.com/watch?v=vxoQaaI3-7A (https://www.youtube.com/watch?v=vxoQaaI3-7A)
you can buy it ,its 6,999$: http://onlyflyingmachines.com/product/ofmgq8octa/ (http://onlyflyingmachines.com/product/ofmgq8octa/)
regards
rohan
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: sooraj.palakkad on December 05, 2014, 09:24:33 PM
Rohan, his purpose is CONFIDENTIAL .!

OFM products are good, but the link you gave, can it load 5Kg on it's belly and keep it's wings spread wide in air for 50 min.s ???
If yes, that's what this guy is looking for.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: rohan123 on December 05, 2014, 09:26:46 PM
i didn't read that reply(was typing at that time)
regards
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: dheerajramaraju on December 05, 2014, 09:29:17 PM
That's a nice platform...
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: dheerajramaraju on December 05, 2014, 09:30:53 PM
I am looking for something smaller in size...
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: rohan123 on December 05, 2014, 09:31:39 PM
it can lift 6-7 kg ,you can add a couple of batteries ,will increase the flight time.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: dheerajramaraju on December 05, 2014, 09:33:56 PM
How confident are you, in terms of reliability of such a build. Have any of you really built such platforms in past.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: rohan123 on December 05, 2014, 09:34:14 PM
then ,i will suggest a X8 configuration,it is a quad in which you mount 2 motors on one arm so the as in a octa the size increases because there are 8 props ,in a X8 there will be just 4 up and 4 below so the arm size can be reduced.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: rohan123 on December 05, 2014, 09:36:36 PM
well i have never build such a machine but i think there will be a few people who would spend that much money on a project.
but you should ask alishanmao ,the guy is a lot experienced and if you dont want to build the multirotor yourself ,maybe he can build it for you.
regards
rohan
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: dheerajramaraju on December 05, 2014, 09:38:24 PM
Thank You all of you..
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: SK1701 on December 05, 2014, 09:43:09 PM
A multirotor like this can be seen as a serious security risk by government agencies. It can cause real panic if people find that it can cary payloads of up to 5 kg for such a sustained time. In the RC/ drones debate, one of the best arguments modellers have is the limited flight time and payload capacity and a machine like this would get rid of both limitations. I think that it is important to know the purpose of such a machine before proceeding.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: dheerajramaraju on December 05, 2014, 09:44:23 PM
The purpose is only for getting an idea how much it might cost in real world for anyone to get it done.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: sooraj.palakkad on December 05, 2014, 09:46:54 PM
I like that. !
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: rohan123 on December 05, 2014, 09:57:54 PM
well,i agree with @SK1701 but we can't force you to tell the purpose so buying or getting it built from a professional would be better as a professional like alishanmao sells these big machines ,so has information about legalisation of such multirotors.
may i know what size of multicopter are you looking for ?,as the one i recommended has more than 5kg payload capacity and 30+ flight time which can be increased by adding a lipo.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: dheerajramaraju on December 05, 2014, 10:02:26 PM
I am only studying on what are the possible builds for such a capable system and how many really think it can be built.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: rohan123 on December 05, 2014, 10:08:13 PM
with resources and experience anything can be done ,you have the resources but if you need advanced experience in multirotors to build it yourself
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: dheerajramaraju on December 05, 2014, 10:14:38 PM
ok.. what is advance experience means..
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: santhosh-r on December 05, 2014, 10:20:24 PM
The advance experience refers to the frame design and manufacture(if you're going to make it yourself) , motor sourcing ,  battery sourcing ,advanced flight control board like DJI NAZA,A2 ,WOOKONG - as nothing is made in INDIA and everything is imported and importing -> customs , bribe to customs to release a such a costly and important shipment ....and so on
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: dheerajramaraju on December 05, 2014, 10:22:58 PM
ok..
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: rohan123 on December 05, 2014, 10:40:40 PM
i meant if you have alot of experience with multirotors and flight controllers ,like an electronic engineer has knowledge about the electronics  and the knowledge to program some flight controllers like the ardupiolet ,multiwii ,and if you have built several UAV's before you gain alot of experience ,as the first multicopter is considered the hardest one for someone without experience.from how long have you been in this hobby?
regards
rohan
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: dheerajramaraju on December 05, 2014, 10:46:05 PM
Quite a while...
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: cyberhack on December 05, 2014, 10:53:07 PM
did u see that idea internet network advertisement :P juss kidding ( talking quad ) lol bdw if u r serious u can build it ...........
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: IndianHobbyShop on December 06, 2014, 01:02:59 AM
Just talking from Technical Point of View, The biggest hindrance that i see in such a multirotor is "to design a setup which can fly at 1C (including Payload)"
Otherwise, how are you going to get 50-55mins flight time?

Not sure why people are recommending Nano Tech A-Spec LiPo's, when you actually need just the opposite. :giggle:
Low C Rating LiPo's would be better due to lesser weight when compared to higher C Rating counterparts.

Even if someone is able to design a super efficient multirotor which can hover with it's weight + Payload at 50Amps, he would still need to add in a whopping 50,000mah LiPo (that's 1/3rd of what the battery in your Home UPS can store) which would weight another 6-10KG (6S LiPo)

Basically you need something with AUW 15-20KG with flight time of 1Hr.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: akhilzid on December 06, 2014, 01:15:03 AM
Quote from: IndianHobbyShop on December 06, 2014, 01:02:59 AM
Just talking from Technical Point of View, The biggest hindrance that i see in such a multirotor is "to design a setup which can fly at 1C (including Payload)"
Otherwise, how are you going to get 50-55mins flight time?

Not sure why people are recommending Nano Tech A-Spec LiPo's, when you actually need just the opposite. :giggle:
Low C Rating LiPo's would be better due to lesser weight when compared to higher C Rating counterparts.

Even if someone is able to design a super efficient multirotor which can hover with it's weight + Payload at 50Amps, he would still need to add in a whopping 50,000mah LiPo (that's 1/3rd of what the battery in your Home UPS can store) which would weight another 6-10KG (6S LiPo)

Basically you need something with AUW 15-20KG with flight time of 1Hr.

Exactly Pointed the facts..
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: chintal on December 06, 2014, 03:00:21 AM
Its possible all you need is a huge battery pack made out of panasonic ncr batteries
Double the cost and half the weight
Using tbs 3-6s lightweight escs
And u8 motors
With a custom made cf frame
Will take around two months of research to get the perfect thing and price can go upto 20 lakhs
But its possible

I have a 40 mins flying copter with a gopro two axis gimbal and video tx
Title: Re:
Post by: rcrcnitesh on December 06, 2014, 12:32:21 PM
Foxtechfpv`s d130 and k130
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: chintal on December 06, 2014, 01:26:47 PM
I guess he needs 50 mins flight time
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: rcrcnitesh on December 06, 2014, 02:07:00 PM
Well they offer 7kg payload and 38min flight time.
So if you add another battery of 2kg you can easily bring the flight time to 50min.

Experts please correct me.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: chintal on December 06, 2014, 03:35:27 PM
I have flown them u dnt get 38 mins
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: rcrcnitesh on December 06, 2014, 03:38:17 PM
Oh!!! Wow You have flown them.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: chintal on December 06, 2014, 03:51:01 PM
http://youtu.be/U3vbSLkZIrI
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: RCNeil21 on December 06, 2014, 07:26:53 PM
If this is just to know if it can be built, yes it can. You can get 2-3 hrs flight time 5kg+ payload and require approx limitless budget. Most of the quad will be classified military equipment not available to the public, so you will also need connections to get it. And yes 2-3 months time to design and build it to your specific needs by a expert team of electronics, mechanical and aeronautical engineers.

Bhavesh sir, my bad forgot the batts need to be highly efficient rather than have a high output.
Title: Re: Who can build a multirotor for given specs and how much it will cost?
Post by: chintal on December 06, 2014, 08:03:53 PM
@rcbeil21 thats exactly what i said buy some people prefer taunting then sharing knowledge