RC India
Welcome Guest, please login or register.
 
Pages: 1 2 [3]  All   Go Down
0 Members and 1 Guest are viewing this topic. Topic Tools Topic Tools 
Read
« Reply #50 on: October 24, 2010, 11:51:05 PM »
Harveer
Heli Lover
Senior Member

***

Reputation Power: 3 
Harveer has no influence.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Advanced
Posts: 195
Join Date: Apr, 2010



This is exactly what I was referring to.  The first tank is always sort of unpredictable in terms of tuning (ie, dead-sticks).

Starting trouble is another issue anwar, may be due to flooded engine bcoz the engine is running rich.
« Last Edit: October 24, 2010, 11:54:52 PM by anwar » Logged
 

Read
« Reply #51 on: October 25, 2010, 10:22:14 AM »
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: 1603
Join Date: Mar, 2009

RC Plane Designer / Test Pilot @ Team Vortex-RC



Thanks. Any hints to the pull-pull setup ? How taut should the wires be ? and what to do about the little slop wue to the amplication of the servo play, caused by the long horn on the servo ?

Also, to secure the ends of cables should i put a drop of epoxy on them ?
Logged

 

Read
« Reply #52 on: October 25, 2010, 11:02:27 AM »
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: 1603
Join Date: Mar, 2009

RC Plane Designer / Test Pilot @ Team Vortex-RC



Also, any hints/tips on cowl installation ? Its got a huge inlet in the front, should i attempt to baffle it ? I wouldnt like the engine to over heat !
Logged

 

Read
« Reply #53 on: October 25, 2010, 12:15:03 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: 1603
Join Date: Mar, 2009

RC Plane Designer / Test Pilot @ Team Vortex-RC



One more quick question. Should i attempt to mount the tank close to CG ? or does it need to be close to the engine ?
Logged

 

Read
« Reply #54 on: October 26, 2010, 09:46:22 AM »
flatspin_king
Plane Lover
Senior Member

***

Reputation Power: 3 
flatspin_king has no influence.
Offline Offline

City: New Delhi
State: Delhi
RC Skills: Intermediate
Posts: 175
Join Date: Feb, 2010



hi gauravag,
     congrats on the maiden. I would recommend using the standard tygon gas fuel line if you are not already doing so - but even this will eventually harden with exposure to fuel and you will have to replace it.
As for the pull - pull I as far as I understand it should not be drum tight or tight like a guitar string but tight enough that it makes a "thwak" sound when you pluck it - I dont know if this makes sense. btw a little slop in metal gear servos is a fact of life -just make sure you have enough grease on the gears so they dont wear out prematurely.
It is always a good idea to baffle the engine - there can be high pressure in the cowl which prevents adequate airflow over the engine despite the big opening - and air extraction is equally important -here is link which I found useful
http://www.prme.nl/forum/viewtopic.php?p=506#506

as for the tank ideally it should be as close to the cg as possible. The carburetors on gas engine have a built in pump -so the tank doesnt have to be close to the engine
cheers,
Nishad

      
Logged
 

Read
« Reply #55 on: October 26, 2010, 10:21:03 AM »
flatspin_king
Plane Lover
Senior Member

***

Reputation Power: 3 
flatspin_king has no influence.
Offline Offline

City: New Delhi
State: Delhi
RC Skills: Intermediate
Posts: 175
Join Date: Feb, 2010



ps. I did not notice that you were using titanium gear servos - there should not be so much slop with titanium gears  -if the plane is wagging its tail there is definitely too much slop in the set up.
it would be best to first determine the exact source of the slop -is it in the servo or the pull pull set up or both - then you can go with a smaller servo arm and compensate for the loss of throw either mechanically or by adjusting throws through your radio.   
Logged
 

Read
« Reply #56 on: October 26, 2010, 01:25:18 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: 1603
Join Date: Mar, 2009

RC Plane Designer / Test Pilot @ Team Vortex-RC



Thanks Flatspin. I get it what you mean by the sound of the cable. not tight like a guitar string, but tight enough to make a low freq sound.

Will try to tweak this today and also replace the horn on the rudder with a smaller one to see the effect of it on the slop.

BTW I am going to do some work on the airplane this week. I got my SDSHobby parcel today and i have got a smoke muffler, lots of tubing, spinner, opto gas kill switch, etc etc.

My plan is to add a smoke system. I have a TME pump lying around and plan on using it.Will keep you posted with pictures and updates !
Logged

 

Read
« Reply #57 on: October 27, 2010, 10:34:15 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: 1603
Join Date: Mar, 2009

RC Plane Designer / Test Pilot @ Team Vortex-RC



I am thinking of putting the cowl back on, when flying next, this weekend.
Concerned about the huge opening in the front, and not sure if i should leave it like that or work on the baffling.

Harveer, since you have a similar Yak, please suggest if baffling is needed, or if it would be OK just the way it is.

Thanks !
Logged

 

Read
« Reply #58 on: October 28, 2010, 01:05:47 AM »
Harveer
Heli Lover
Senior Member

***

Reputation Power: 3 
Harveer has no influence.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Advanced
Posts: 195
Join Date: Apr, 2010




Harveer, since you have a similar Yak, please suggest if baffling is needed, or if it would be OK just the way it is.

Thanks !

There is no baffling in cowl. Some part of the head is out of cowl, can see in the pix. Thats all.

ACI (31).jpg
Re: My First 50-CC Gasser - Build thread
* ACI (31).jpg (46.05 KB, 800x600 - viewed 1279 times.)
This post has 1 more images(s)/attachment(s). Please login or register to view them.
Logged
 

Read
« Reply #59 on: October 28, 2010, 10:37:01 AM »
flatspin_king
Plane Lover
Senior Member

***

Reputation Power: 3 
flatspin_king has no influence.
Offline Offline

City: New Delhi
State: Delhi
RC Skills: Intermediate
Posts: 175
Join Date: Feb, 2010



My plan is to add a smoke system. I have a TME pump lying around and plan on using it.Will keep you posted with pictures and updates !

cool! need video with smoke on  Grin
« Last Edit: October 28, 2010, 10:59:00 AM by anwar » Logged
 

Read
« Reply #60 on: October 28, 2010, 10:43:36 AM »
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: 1603
Join Date: Mar, 2009

RC Plane Designer / Test Pilot @ Team Vortex-RC



Lots of work being done on the airplane. Had to take out the fuel tank, cabling etc and redid it all.
Added an Opti-Kill switch, an RCExel tachometer ( reads off the ignition ) , installed the TME pump, added a 16 oz tank for smoke, added fuel dots I got from SDSHobby, and also smoke muffler.
Also mounted all switches on the side of the fuse, opposite the exhaust for easy accessability.

Only thing now that I do not have is a big 4.8V battery pack for ignition. The one i have is only 1000mah and I need more.

Next task is to enlarge openings in the cowl more, and also to make a hole in the cowl to help access the needles.

Got a spinner too, and will mount it on the plane after the cowl.

SDShobby rocks. Got real good stuff  from them at pretty reasonable prices. Quality of spinner is amazing, the smoke muffler is also too good - for < $20 .

Plan is to fly again this weekend with all enhancements.
For smoke, planning to use 50% kerosene - 50% diesel mix. 

Still lots of work to be done, will post pictures later today.
Thanks
Logged

 

Read
« Reply #61 on: October 30, 2010, 11:26:29 AM »
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: 1603
Join Date: Mar, 2009

RC Plane Designer / Test Pilot @ Team Vortex-RC



Spent nearly the whole week trying to puti onthe smoke system, but given up the hope now. Will atempt it sometime later. Problem was with the smoke tanbk mounting. There wasnt anough space within the fuse to mount both tanks and I tried all options and it didnt work. THe only optionremaining is to cut the covering and install the tank within the canister tunnel below the main tank.

Will work on that next week.

Flew the plane today . I am addicted to gas now, for sure. Though the plane snaps on giving even 60% elevator so thats the only bad tendency i have found so far. Or is it usual for big planes to snap out ? I never had this in my other planes.
Logged

 

Read
« Reply #62 on: October 30, 2010, 12:19:37 PM »
flatspin_king
Plane Lover
Senior Member

***

Reputation Power: 3 
flatspin_king has no influence.
Offline Offline

City: New Delhi
State: Delhi
RC Skills: Intermediate
Posts: 175
Join Date: Feb, 2010



cant you get a smaller tank for smoke? As for snapping have you already put some negative expo on your control surfaces?
Logged
 

Read
« Reply #63 on: October 30, 2010, 06:37:21 PM »
bmanoj2
Plane Lover
Forum Veteran

****

Reputation Power: 4 
bmanoj2 has no influence.
Offline Offline

City: Dubai, UAE
State: OUTSIDE INDIA
RC Skills: Advanced
Posts: 372
Join Date: May, 2010



Though the plane snaps on giving even 60% elevator so thats the only bad tendency i have found so far. Or is it usual for big planes to snap out ? I never had this in my other planes.

Did you adjusted the expo settings or just reduced the travel to 60% ?.
Negative exponential (-) decreases initial servo movement. Positive exponential (+) increases initial movement. (For Futaba).
Logged

"Learn from yesterday, live for today, hope for tomorrow."
 

Read
« Reply #64 on: February 07, 2018, 05:27:10 PM »
prabu85
Plane Lover
Senior Member
***

Reputation Power: 2 
prabu85 has no influence.
Offline Offline

City: Trichy
State: Tamil Nadu
RC Skills: Beginner
Posts: 125
Join Date: Dec, 2016



Yak 55 Kit For sale https://drive.google.com/open?id=1uAyqOlbLtibr_eQb4w0TWvqBW_T9cWXM

Laser cut Wooden kit.

Regards,
Prabu
Logged
 

Read
« Reply #65 on: June 29, 2018, 01:41:17 PM »
prabu85
Plane Lover
Senior Member
***

Reputation Power: 2 
prabu85 has no influence.
Offline Offline

City: Trichy
State: Tamil Nadu
RC Skills: Beginner
Posts: 125
Join Date: Dec, 2016



Rs 16000
Yak 55 Kit For sale https://drive.google.com/open?id=1uAyqOlbLtibr_eQb4w0TWvqBW_T9cWXM

Laser cut Wooden kit.

Regards,
Prabu

Sent from my XT1068 using Tapatalk
Logged
 

Pages: 1 2 [3]  All   Go Up
Jump to:  

Related Topics
Subject Started by Replies Views Last post
HK 450 MT build Thread. « 1 2 ... 8 9 »
Helis
vinay 218 88955 Last post August 29, 2012, 12:05:23 PM
by vinay
HK 500 CMT TT build Thread. « 1 2  All »
Helis
vinay 41 29781 Last post December 11, 2011, 08:54:59 AM
by vinay
Spaddy - build thread « 1 2  All »
Self-designed, DIY and College Projects
izmile 28 15439 Last post June 06, 2011, 07:12:07 PM
by SunLikeStar
My First Gasser - IBIS 1.20 (MLD 28cc) BUILD
Gas/Glow/Nitro Planes
Sahevaan 13 8162 Last post November 25, 2012, 09:45:09 PM
by Sahevaan
gnome build thread - my first balsa build
Kites, Trains, Free Flight and All Others
Suyash 12 5345 Last post February 19, 2017, 08:23:45 PM
by sanjayrai55