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: April 21, 2010, 07:16:11 PM »
avijit17basu
Plane Lover
Senior Member
***

Reputation Power: 3 
avijit17basu has no influence.
Offline Offline

City: CHENNAI
State: Tamil Nadu
RC Skills: Beginner
Posts: 214
Join Date: Mar, 2009




What reciever should one use on a gasser with a 72MHz radio.
Are PCM recievers an absolute MUST?
Avijit
Logged
 

Read
« Reply #1 on: April 21, 2010, 09:01:15 PM »
anwar
Administrator
Forum Hero

*****

Reputation Power: 141 
anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!
Offline Offline

City: Doha (Qatar) & Thrissur
State: Kerala
RC Skills: Advanced
Posts: 11619
Join Date: Mar, 2009

RC India - Flying and racing with open minds !



PCM would be strongly advisable for couple of reasons.

1.  It is less susceptible to glitches than regular FM (PPM).  A glitch during landing would not be pretty.

2.  PCM provides "failsafe" capability.

Not much personal experience on gassers, but PCM versus PPM was one of the first ever issues I had to learn in RC (while troubleshooting glitches on a Trex 450 heli).
Logged

Hangar : Please see my introduction.
RC India forum and me : About this forum.
 

Read
« Reply #2 on: April 22, 2010, 01:38:34 AM »
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!



It should be noted that both PPM and PCM uses frequency modulation (FM). So, whatever be the source of interference would affect both PPM and PCM equally. However, PCM is a more resilient as it transmits the stick information as digital data (with CRC) rather than just pulse duration (PPM). So, PCM is better than PPM.

As pointed out by Anwar bai, in event of continuous interference or loss of signal PCM has an advantage of failsafe settings which PPM does not offer.

Logged

"Anything can fly" - SPADs just prove that!
 

Pages: [1]   Go Up
Jump to:  

Related Topics
Subject Started by Replies Views Last post
Getting into Gassers « 1 2 3 4 5 »
Gas/Glow/Nitro Planes
chanvivek 101 42952 Last post April 20, 2010, 07:04:21 PM
by @@Ron
How to get into Gassers
Gas/Glow/Nitro Planes
harsh 6 5825 Last post May 13, 2010, 10:19:08 PM
by harsh
Type of foam to be used.
Tools, Materials and Building Techniques
DixantRc 6 4979 Last post December 02, 2013, 02:51:06 PM
by anwar
Small & Compact Gassers
Fuel and Engines
sanjayrai55 0 2455 Last post December 01, 2014, 06:49:50 AM
by sanjayrai55
You might have never seen this type of quadcopter
Multirotors
Dream Innovation 8 5067 Last post May 22, 2015, 07:36:34 PM
by Dream Innovation