RC India
Welcome Guest, please login or register.
 
Pages: [1]   Go Down
0 Members and 1 Guest are viewing this topic. Topic Tools Topic Tools 
Read
« on: July 01, 2013, 06:57:54 PM »
agpraneet
Plane Lover
Active Member
**

Reputation Power: 1 
agpraneet has no influence.
Offline Offline

City: Ghaziabad
State: Uttar Pradesh
RC Skills: Beginner
Posts: 5
Join Date: Jul, 2013




Influenced by the plans for blubaby, we have tried to build a plane. We had a lightweight fuselage available, taken out from a wooden model. So decided to use that. So scaled the whole thing down to the fuselage size. So, the 42" wings are now 52 cms or 20". Now, the problem is we don't know if it can fly. If it can, can someone suggest the appropriate electronics. We are in this hobby for long and would prefer components that can be used afterwards as well. Like a 4 channel radio with sim etc.

Specs:
52 cms wingspan
flat bottomed aerofoil
chord length 10.5 cms
Material: Polystyrene (thermocole)
Total weight: 70gms

Thanks in advance

Pics: https://drive.google.com/folderview?id=0B7otepoRGh0QRHFWM3BkZVE1ZFk&usp=sharing

20130701_081358.jpg
Need advice on a scratch built plane
* 20130701_081358.jpg (8.09 KB, 800x600 - viewed 528 times.)
This post has 1 more images(s)/attachment(s). Please login or register to view them.
Logged
 

Read
« Reply #1 on: July 01, 2013, 07:41:57 PM »
kaarthic.r.b
Plane Lover
Active Member

**

Reputation Power: 1 
kaarthic.r.b has no influence.
Offline Offline

City: coimbatore
State: Tamil Nadu
RC Skills: Beginner
Posts: 25
Join Date: Apr, 2013



9 gram servos:

http://www.rcbazaar.com/products/794-avionic-av9a-9g-servo.aspx

motor :

http://www.rcbazaar.com/products/1476-odin-2730-kv1300-thrust-440-gms.aspx

ESC:

http://www.rcbazaar.com/products/806-avionic-20amp.aspx

battery:

http://www.rcbazaar.com/products/1212-wolfpack-1000mah-20c-74v.aspx

Tx and Rx:

http://www.rcbazaar.com/products/1773-avionic-rcb7x-7ch-tx-with-7ch-rx-and-wireless-simulator.aspx
Logged

RCB7X | home made trainer| old fogey|
 

Read
« Reply #2 on: July 01, 2013, 07:51:50 PM »
kaarthic.r.b
Plane Lover
Active Member

**

Reputation Power: 1 
kaarthic.r.b has no influence.
Offline Offline

City: coimbatore
State: Tamil Nadu
RC Skills: Beginner
Posts: 25
Join Date: Apr, 2013



If you want to know the result then fly it..... Giggle Giggle
Logged

RCB7X | home made trainer| old fogey|
 

Read
« Reply #3 on: July 01, 2013, 08:15:42 PM »
agpraneet
Plane Lover
Active Member
**

Reputation Power: 1 
agpraneet has no influence.
Offline Offline

City: Ghaziabad
State: Uttar Pradesh
RC Skills: Beginner
Posts: 5
Join Date: Jul, 2013



Thanks Karthic. I guess we will do that. Just wanted to know if he 20" wingspan with that weight can fly :-). Most of the plans are 40-42" models only

Thanks for the components. Can you explain how the brushless motor is selected? And can you suggest a cheaper tx/rx?
Logged
 

Read
« Reply #4 on: July 01, 2013, 09:00:23 PM »
kaarthic.r.b
Plane Lover
Active Member

**

Reputation Power: 1 
kaarthic.r.b has no influence.
Offline Offline

City: coimbatore
State: Tamil Nadu
RC Skills: Beginner
Posts: 25
Join Date: Apr, 2013



6ch channel radio :

http://aeroworks.co.in/store/index.php?id_product=115&controller=product

you can select the motor depending  on weight of the plane
Logged

RCB7X | home made trainer| old fogey|
 

Read
« Reply #5 on: July 24, 2013, 04:16:10 PM »
agpraneet
Plane Lover
Active Member
**

Reputation Power: 1 
agpraneet has no influence.
Offline Offline

City: Ghaziabad
State: Uttar Pradesh
RC Skills: Beginner
Posts: 5
Join Date: Jul, 2013



okay. now that I have purchased the rx/tx (a 6 channel flysky ct6b), I am back to choosing a power system. What I am currently lookin at is

http://www.rcdhamaka.com/index.php?main_page=product_info&cPath=100_93&products_id=273

or the one suggested by kaarthik.

for the prop, I am thinking of a 8x6 prop after reading on the internet. And this is supposed to be a trainer. For the ESC, I plan to go with the one suggested by kaarthik

for the battery, i plan to use a 900mah battery to save on some weight.

http://www.rcbazaar.com/products/1737-wolfpack-900mah-20c-74v.aspx

I am looking for a go ahead for the above mentioned scratch build. Is it good to go?
Logged
 

Read
« Reply #6 on: July 24, 2013, 08:06:42 PM »
sanjayrai55
Plane Lover
Forum Hero

*****

Reputation Power: 85 
sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.sanjayrai55 is a force to reckon with.
Offline Offline

City: Gurgaon
State: Haryana
RC Skills: Intermediate
Posts: 8337
Join Date: Dec, 2011

Don't wake a Tiger until you've factored the teeth



I do not agree with your basic premise. A 20" span model is always difficult to fly. As a beginner you will have difficulty in all 3 x-y-z dimensions, and should have a large wingspan, the larger the better. Choose your equipment around this. The better quality equipment you get, the happier you will be. Don't go for cheapest.

I suggest for the first model buy a good kit, or enlist a very seasoned modeller to guide you. Keep it simple at first. Trust me, when you are in the air for the first time, your hands will be literally very full. The last thing you want is faulty equipment or a faulty model.

Don't be in a hurry to scratch-build. There will be plenty of time for that. First get familiar with the basic fundas, both of flying, and of a flying model's characteristics. If you must, go with a proven design, which is easy and uncomplicated .

Good luck!
Logged

 

Read
« Reply #7 on: July 25, 2013, 12:52:54 AM »
shauviks
Plane Lover
Forum Veteran

****

Reputation Power: 7 
shauviks has no influence.
Offline Offline

City: Bhubaneshwar
State: Orissa
RC Skills: Intermediate
Posts: 380
Join Date: Mar, 2012

#get_set_fly



+1 Sanjay sir
Definitely 20 inch wingspan is a very difficult plane to control.As a beginner i would suggest you to go for some tested begginer models like easy star 2 from RC Dhamaka or sky surfer from RC Bazaar.

Keep the scratch built model aside for a few days learn to fly in a trainer model. Get the experince then try a scratch built coz in scratch built model u will never come to know what went wrong and eventually u will loose interest in the hobby .........



Chheeeers
Logged

+91-8093863974
#Bring it on flyer
 

Read
« Reply #8 on: July 25, 2013, 01:38:29 PM »
PankajC
Plane Lover
Forum Hero

*****

Reputation Power: 13 
PankajC has no influence.
Offline Offline

City: Delhi
State: Delhi
RC Skills: Beginner
Posts: 1022
Join Date: Jul, 2009

Learning to Fly



@Agpraneet - my few bits of information on scratch builds....

The plane with dimensions that you have posted already has a wing cubic loading close to 6 oz/cu-ft. as per the calculations available online. This is close to the limit of the loading necessary for glider category.

Do not power up, it will increase the wing loading e.g. even a 30 gm increase in wt would make the wing loading close to 9 which is somewhere in the range of acrobatic planes, further I do not think battery, motor, prop, receiver, servo all could ever total to under 30 gm...

At best use this as a chuck glider and enjoy your creation.
Logged

Spektrum DX6i | EP Pusher Trainer | EP CUB |
 

Pages: [1]   Go Up
Jump to:  

Related Topics
Subject Started by Replies Views Last post
My second Scratch Built plane
Electric Planes
lastRites 19 11758 Last post December 01, 2012, 09:12:19 AM
by kamaraj74
my first scratch built plane
Self-designed, DIY and College Projects
rockmania.89 5 4762 Last post May 03, 2013, 01:57:21 PM
by aniket210696
My First Scratch built plane Cessna 182
Electric Planes
ayub 2 2576 Last post October 14, 2017, 12:25:47 AM
by ayub
My second scratch built plane AJ Slick
Electric Planes
ayub 8 4737 Last post October 17, 2017, 11:55:22 PM
by ayub
Dragonfly : My First RC Plane [Scratch Built]
Electric Planes
Kaptain Kool 13 2666 Last post July 07, 2021, 07:31:06 PM
by Kaptain Kool