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: December 02, 2009, 03:39:08 PM »
tg
Plane Lover
Forum Hero
*****

Reputation Power: 1 
tg has no influence.
Offline Offline

City: Bangalore
State: Karnataka
RC Skills: Beginner
Posts: 553
Join Date: Oct, 2009




Hi,
    In several posts on this forum and also in the specs of many listed models we see the wing span and fuse length specified. Is there any specific relationship between the two? When building a model of your own specs how do we choose the two?? For example, what would be the flying characteristics of a model with a long wing span and short fuse or vice versa.
Logged
 

Read
« Reply #1 on: December 02, 2009, 03:49:18 PM »
gauravag
Plane Lover
Forum Hero
*****

Reputation Power: 23 
gauravag barely matters.gauravag barely matters.
Offline Offline

City: Allahabad
State: Uttar Pradesh
RC Skills: Advanced
Posts: 1604
Join Date: Mar, 2009

RC Plane Designer / Test Pilot @ Team Vortex-RC



would be interesting to know about this.
For me, I prefer planes with a long tail. most of my planes have a fuse length equal or more than wingspan. Helps in pattern
Logged

 

Read
« Reply #2 on: December 02, 2009, 04:21:36 PM »
izmile
Plane Lover
Forum Hero

*****

Reputation Power: 7 
izmile has no influence.
Offline Offline

City: Reading (England)
State: OUTSIDE INDIA
RC Skills: Intermediate
Posts: 591
Join Date: Mar, 2009

I am a Corogamist!



That is an interesting question. Here is what I inferred from my experience.

I usually have the plane fuse about 1.5 to 1.75 times the wing span. The tail moment would be moderate for this configuration. This would yeild a plane with normal response on the tail feathers. So, you can have relaxed flight with or without requirement for exponentials (depends on the control surface area). Normal trainers, warbirds and most other aerobatic sport planes fall under this catagory.

For planes with longer fuse more than or equal to the wing span. The tail moment is quite high. The tail has to travel longer displacement to make the same effect comparted to a short tail airplane. So, they tend to be a bit slow and has finer resolution on tail control surfaces. This is desirable for precision flying as the pilot would have sometime to react and plan the maneuver. High tail moment will be desirable for sharp, precise and crisp aerobatic maneuvers and they are also good for 3D flying. esp during hovering.

As a simple analogy, its easier balancing a longer pole on your finger tip than balancing a pencil. You can make a few errors in balancing a longer pole as the moment is high. But for a pencil even a small displacement is enough to topple it.

I observed that most patterns have fuse length equal to wing span.

-Ismail
Logged

"Anything can fly" - SPADs just prove that!
 

Read
« Reply #3 on: December 02, 2009, 04:46:59 PM »
rcforall
Plane Lover
Forum Hero

*****

Reputation Power: 22 
rcforall barely matters.rcforall barely matters.
Offline Offline

City: Chennai
State: Tamil Nadu
RC Skills: Beginner
Posts: 1663
Join Date: Mar, 2009



That is an interesting question. Here is what I inferred from my experience.

I usually have the plane fuse about 1.5 to 1.75 times the wing span. The tail moment would be moderate for this configuration. This would yeild a plane with normal response on the tail feathers. So, you can have relaxed flight with or without requirement for exponentials (depends on the control surface area). Normal trainers, warbirds and most other aerobatic sport planes fall under this catagory.


-Ismail

I suppose you mean 0.5 and 0.75  not 1.5 and 0.75
Logged

www.zuppa.io : vehicle telematics, ADAS, IoT , Drones
 

Read
« Reply #4 on: December 02, 2009, 04:52:56 PM »
izmile
Plane Lover
Forum Hero

*****

Reputation Power: 7 
izmile has no influence.
Offline Offline

City: Reading (England)
State: OUTSIDE INDIA
RC Skills: Intermediate
Posts: 591
Join Date: Mar, 2009

I am a Corogamist!



Yes, that was a mistake. Thanks Sai.

I meant 1.5 to 1.75 times of half the wingspan. Sorry for the confusion.

-Ismail
Logged

"Anything can fly" - SPADs just prove that!
 

Read
« Reply #5 on: December 22, 2009, 05:17:22 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



When we determine the length, is the fuse length calculated along with the elevator end?
Anyrelation of the wingspan to the chord?

Pankaj
Logged

Spektrum DX6i | EP Pusher Trainer | EP CUB |
 

Read
« Reply #6 on: December 24, 2009, 12:43:08 AM »
Rao
Plane Lover
Forum Veteran

****

Reputation Power: 5 
Rao has no influence.
Offline Offline

City: Tadepalligudem
State: Andhra Pradesh
RC Skills: Beginner
Posts: 410
Join Date: Mar, 2009



 Pankaj

I am attaching a diagram which I hope would be of some help.Using that diagram I have successfully built a trainer plane. It is not my drawing but copied from a book named Building & Flying Radio Controlled Model Aircraft written by DAVID BODDINGTON. I purchased it from a second hand Pavement Books shop in Hyderabad approx about a decade ago when I was just beginning in this hobby.It is a wonderful book for RC Modelers.
Hope the drawing would be of some help to you.

Rao.

RC Plane Design_1_1.jpg
Re: Relationship between wing span and fuse length
* RC Plane Design_1_1.jpg (39.06 KB, 800x349 - viewed 3411 times.)
Logged
 

Pages: [1]   Go Up
Jump to:  

Related Topics
Subject Started by Replies Views Last post
Wing span and fuse length
Electric Planes
tg 3 4806 Last post October 15, 2009, 12:31:12 PM
by tg
Fuse length
RC General Topics
Dreamliner 2 3702 Last post January 04, 2010, 02:06:08 PM
by ankur
Build Log : Ellipso V2 High Wing 36 Inch Wing Span
Electric Planes
Mjet 19 13644 Last post July 20, 2013, 11:27:15 AM
by Mjet
slow flyer-magnum 24 wing span full fuse for rci 6th 2015 sweepstakes
Electric Planes
romanxdsouza 18 9914 Last post March 03, 2018, 08:47:15 PM
by romanxdsouza
LARGEST RC KITE.....8 FT wing span....!!!
Kites, Trains, Free Flight and All Others
madaquif 19 6483 Last post May 27, 2020, 11:50:22 PM
by madaquif