RC India
Welcome Guest, please login or register.
 
Pages: 1 [2] 3  All   Go Down
0 Members and 2 Guests are viewing this topic. Topic Tools Topic Tools 
Read
« Reply #25 on: October 15, 2020, 01:19:01 PM »
Turbo20
Plane Lover
Active Member
**

Reputation Power: 1 
Turbo20 has no influence.
Offline Offline

City: Mumbai
State: Maharashtra
RC Skills: Intermediate
Posts: 13
Join Date: Jun, 2020



Sir newbie here,

For foam I understand that you have to cut it using hot wire but how to go about Balsa? how to cut the wing profile on it or even the foam. Any easy way for foam without hotwire?

Logged
 

Read
« Reply #26 on: October 15, 2020, 03:15:24 PM »
K K Iyer
Global Moderator
Forum Hero
*****

Reputation Power: 54 
K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Intermediate
Posts: 4558
Join Date: Jan, 2012



@turbo20,

1mm foam (disposable dinner plate) can be cut with scissors

Depron sheets and balsa can be cut with a razor blade, but safer to use surgical blades #11 or #24 with matching handle.

For balsa 5mm and above, (and plywood) you need a baby saw or razor saw.

Thermocol upto about 1Ē thick can be cut with a new razor blade.

Hot wire cutter is needed only if you want to cut curved profiles, like wing aerofoil.

Hope this helps.
Regards

7F2376E3-D3F3-44A6-A7C3-8CB1F3B424D1.jpg
Re: 2nd Chuck - Lunchbox
* 7F2376E3-D3F3-44A6-A7C3-8CB1F3B424D1.jpg (18.34 KB, 320x246 - viewed 92 times.)
Logged
 

Read
« Reply #27 on: October 15, 2020, 08:03:30 PM »
K K Iyer
Global Moderator
Forum Hero
*****

Reputation Power: 54 
K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Intermediate
Posts: 4558
Join Date: Jan, 2012



Materials for balsa kit build

The plan says 3/32Ē for wing, 1/8Ē hard for fuselage and 1/32Ē for stab and fin.
In the kit Iím using 2.2mm for wing, 2x2.2mm for fuselage and 1.5mm sanded to 0.75mm for tail.

The wings are already sanded to an airfoil section, though not as sharp as in the plan, as it would have made the wings too delicate.
The wing centre is already beveled for dihedral.
The fuselage has an extension below the nose for the catapult, and a 1/2Ē extension at the back for pulling back in catapult launch.
All parts already doped and finish sanded with 600 grit sandpaper as specified in the plan article.
Included is a small Feviquik, pin and thread for balancing, plasticine for nose weight and some rubber bands for an initial catapult.

So it can actually be ready to fly in 5-10 minutes. (However see wing fuselage joint reinforcement in a following post)

Edit:
Not able to load pics for some reason.
Will post assembly instructions and pics tomorrow
« Last Edit: October 15, 2020, 08:20:01 PM by K K Iyer » Logged
 

Read
« Reply #28 on: October 15, 2020, 08:30:20 PM »
K K Iyer
Global Moderator
Forum Hero
*****

Reputation Power: 54 
K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Intermediate
Posts: 4558
Join Date: Jan, 2012



Hereís a pic of the kit contents

A65A9282-C98B-4F8C-9ADF-7FCA85320F02.jpg
Re: 2nd Chuck - Lunchbox
* A65A9282-C98B-4F8C-9ADF-7FCA85320F02.jpg (19.29 KB, 320x239 - viewed 86 times.)
Logged
 

Read
« Reply #29 on: October 15, 2020, 08:46:36 PM »
K K Iyer
Global Moderator
Forum Hero
*****

Reputation Power: 54 
K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Intermediate
Posts: 4558
Join Date: Jan, 2012



Assembly

Use a grid, graph paper or at least draw two perpendicular lines to ensure that the stab is perpendicular to the fuselage in top view.

Hold the fuselage in place with the plasticine. Ensure fuselage and fin are perpendicular to stab.

Put a few dots of Feviquik on both sides.
Wait and check if everything is square.
Then put a small amount of Feviquik on both sides.

350102D4-FDF2-4716-BBFD-FDF997D1E8C3.jpg
Re: 2nd Chuck - Lunchbox
* 350102D4-FDF2-4716-BBFD-FDF997D1E8C3.jpg (10.04 KB, 320x129 - viewed 82 times.)
Logged
 

Read
« Reply #30 on: October 15, 2020, 08:52:02 PM »
K K Iyer
Global Moderator
Forum Hero
*****

Reputation Power: 54 
K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Intermediate
Posts: 4558
Join Date: Jan, 2012



The wings are temporarily taped at the bottom, and BEVELED AT THE TOP OF THE JOINT to accomodate the bend for the dihedral.


19293F13-511B-493B-9E97-B599363C451C.jpg
Re: 2nd Chuck - Lunchbox
* 19293F13-511B-493B-9E97-B599363C451C.jpg (13.76 KB, 320x228 - viewed 87 times.)
Logged
 

Read
« Reply #31 on: October 15, 2020, 08:55:59 PM »
SI74
Plane Lover
Forum Veteran
****

Reputation Power: 7 
SI74 has no influence.
Offline Offline

City: Muvattupuzha
State: Kerala
RC Skills: Beginner
Posts: 499
Join Date: Jun, 2015



Thank you sir for the detailed instructions! And we expect more on launch , trimming etc .
Logged
 

Read
« Reply #32 on: October 15, 2020, 08:59:07 PM »
K K Iyer
Global Moderator
Forum Hero
*****

Reputation Power: 54 
K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Intermediate
Posts: 4558
Join Date: Jan, 2012



Place one wing flat with the other tip raised 3Ē

Put some Feviquik down the joint.

After a few seconds, pick it up and put some Feviquik down the bottom of the joint.

867A5AA0-1237-4DFB-AA7F-8C00F10958A5.jpg
Re: 2nd Chuck - Lunchbox
* 867A5AA0-1237-4DFB-AA7F-8C00F10958A5.jpg (10.62 KB, 320x158 - viewed 82 times.)
Logged
 

Read
« Reply #33 on: October 15, 2020, 09:56:06 PM »
K K Iyer
Global Moderator
Forum Hero
*****

Reputation Power: 54 
K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Intermediate
Posts: 4558
Join Date: Jan, 2012



Now we have fuselage with the tail parts, and a wing with dihedral.

And we have stick them together.
IN PROPER ALIGNMENT!


62C47C97-3071-4749-ABAC-D2CF28182183.jpg
Re: 2nd Chuck - Lunchbox
* 62C47C97-3071-4749-ABAC-D2CF28182183.jpg (70.87 KB, 640x500 - viewed 22 times.)
Logged
 

Read
« Reply #34 on: October 15, 2020, 09:58:18 PM »
K K Iyer
Global Moderator
Forum Hero
*****

Reputation Power: 54 
K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Intermediate
Posts: 4558
Join Date: Jan, 2012



For once I see several guys watching this thread...

So letís finish the assembly...
Logged
 

Read
« Reply #35 on: October 15, 2020, 10:13:23 PM »
K K Iyer
Global Moderator
Forum Hero
*****

Reputation Power: 54 
K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Intermediate
Posts: 4558
Join Date: Jan, 2012



Mark a point at the top of the fuselage 2” from the nose.

This is where the leading edge of the wing will be.

Set the wing on the fuselage with packing under each wing.

The wing has to be DEAD SQUARE to the fuselage
and its center line should be DEAD CENTRE on the fuselage
And both wingtips at equal height.

See pics.



DFBFD499-0E63-435B-898A-E1608C0BF1AE.jpg
Re: 2nd Chuck - Lunchbox
* DFBFD499-0E63-435B-898A-E1608C0BF1AE.jpg (57.15 KB, 640x481 - viewed 24 times.)
This post has 1 more images(s)/attachment(s). Please login or register to view them.
« Last Edit: October 20, 2020, 02:39:18 AM by KALYANPRODHAN » Logged
 

Read
« Reply #36 on: October 15, 2020, 10:15:42 PM »
K K Iyer
Global Moderator
Forum Hero
*****

Reputation Power: 54 
K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Intermediate
Posts: 4558
Join Date: Jan, 2012



Does it look okay?

Actually the alignment is NOT GOOD ENOUGH

So Iíll adjust it till itís as accurate as I can get it.
Logged
 

Read
« Reply #37 on: October 15, 2020, 10:26:57 PM »
K K Iyer
Global Moderator
Forum Hero
*****

Reputation Power: 54 
K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Intermediate
Posts: 4558
Join Date: Jan, 2012



Once aligned as best as possible, put a dot of Feviquik at the leading edge and trailing edge.

Wait a few seconds, then pick it up to check alignment.

If not satisfied, the wing can be removed easily as it is stuck at only two points, and realigned.

When satisfied, pick it up and run a bead of Feviquik on either side of the wing/ fuselage joint under the wing.

ASSEMBLY COMPLETE !  Grin
Logged
 

Read
« Reply #38 on: October 15, 2020, 10:43:31 PM »
SI74
Plane Lover
Forum Veteran
****

Reputation Power: 7 
SI74 has no influence.
Offline Offline

City: Muvattupuzha
State: Kerala
RC Skills: Beginner
Posts: 499
Join Date: Jun, 2015



Okay sir , understood .Thanks .And where should be itís CG ( with the plasticine)?
Logged
 

Read
« Reply #39 on: October 15, 2020, 10:48:48 PM »
SI74
Plane Lover
Forum Veteran
****

Reputation Power: 7 
SI74 has no influence.
Offline Offline

City: Muvattupuzha
State: Kerala
RC Skills: Beginner
Posts: 499
Join Date: Jun, 2015



Assembly

Use a grid, graph paper or at least draw two perpendicular lines to ensure that the stab is perpendicular to the fuselage in top view.

Hold the fuselage in place with the plasticine. Ensure fuselage and fin are perpendicular to stab.

Put a few dots of Feviquik on both sides.
Wait and check if everything is square.
Then put a small amount of Feviquik on both sides.


Sir , one doubt here . Should we glue the whole fin on top or on one side of the fuselage? If fully glued , how to trim the rudder ?
Logged
 

Read
« Reply #40 on: October 15, 2020, 10:52:55 PM »
K K Iyer
Global Moderator
Forum Hero
*****

Reputation Power: 54 
K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Intermediate
Posts: 4558
Join Date: Jan, 2012



Balancing

Start by putting enough plasticine (~1gm) on the nose, to balance it 1.75Ē from the leading edge.

Then test glide. Add or reduce nose weight till you get a floating glide, with no dive and no stall.
(BTW, this is harder than it sounds!)

12BDC8EF-4FE7-43AB-9F5F-0C3CAAAE0272.jpg
Re: 2nd Chuck - Lunchbox
* 12BDC8EF-4FE7-43AB-9F5F-0C3CAAAE0272.jpg (53.29 KB, 556x640 - viewed 24 times.)
Logged
 

Read
« Reply #41 on: October 15, 2020, 10:58:31 PM »
K K Iyer
Global Moderator
Forum Hero
*****

Reputation Power: 54 
K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Intermediate
Posts: 4558
Join Date: Jan, 2012



Sir , one doubt here . Should we glue the whole fin on top or on one side of the fuselage? If fully glued , how to trim the rudder ?

In the kit itís already stuck on top.
If you make it a bit taller, you can stick it to one side.

Very little rudder is required, soyou can still bend it in.

Like this

DE051A24-C618-4B64-A892-30BDCC724836.jpg
Re: 2nd Chuck - Lunchbox
* DE051A24-C618-4B64-A892-30BDCC724836.jpg (64.38 KB, 565x640 - viewed 26 times.)
Logged
 

Read
« Reply #42 on: October 15, 2020, 11:01:51 PM »
K K Iyer
Global Moderator
Forum Hero
*****

Reputation Power: 54 
K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Intermediate
Posts: 4558
Join Date: Jan, 2012



Ipad battery down.
So bye till tomorrow
Regards to everyone
Logged
 

Read
« Reply #43 on: October 15, 2020, 11:08:37 PM »
SI74
Plane Lover
Forum Veteran
****

Reputation Power: 7 
SI74 has no influence.
Offline Offline

City: Muvattupuzha
State: Kerala
RC Skills: Beginner
Posts: 499
Join Date: Jun, 2015



Balancing

Start by putting enough plasticine (~1gm) on the nose, to balance it 1.75Ē from the leading edge.

Then test glide. Add or reduce nose weight till you get a floating glide, with no dive and no stall.
(BTW, this is harder than it sounds!)

Yes! Thatís the most difficult part ! Smiley Now every step is crystal clear ! Thank you!
Logged
 

Read
« Reply #44 on: October 16, 2020, 08:55:02 PM »
K K Iyer
Global Moderator
Forum Hero
*****

Reputation Power: 54 
K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Intermediate
Posts: 4558
Join Date: Jan, 2012



Took a bit of trial and error to get it to fly properly in my drawing room.

Then I tried it with 2 x 2Ē rubber bands.
Wow. What a surprise!

For testing with 2 x 2Ē rubber bands, youíll need at least a tennis court size area.

With more rubber bands and more pull, youíll need a football field!

Be warned. Donít fly it in a restricted space...

Best wishes

168F4A86-C4EF-4AF4-A3A1-EDA26DF07D45.jpg
Re: 2nd Chuck - Lunchbox
* 168F4A86-C4EF-4AF4-A3A1-EDA26DF07D45.jpg (76.89 KB, 640x632 - viewed 18 times.)
Logged
 

Read
« Reply #45 on: October 16, 2020, 11:22:06 PM »
K K Iyer
Global Moderator
Forum Hero
*****

Reputation Power: 54 
K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Intermediate
Posts: 4558
Join Date: Jan, 2012



Query from aspersid

If possible can you also add some rubberbands to the kit? The long ones especially or the tan sport ones if you have them, I don't think they are available where I am currently. I'm willing to pay extra for them.

Reply

Included.
Didnít you see the pic of the kit contents?

I was surprised at the performance with 2x 2Ē rubber bands.
With 4x2Ē rubber bands, I think 30 seconds is possible.

Tan rubber, eh?
Iím not sure, but I think a 9Ē loop of 1/8Ē Tan super Sport is the standard for catapult launch gliders.

I have some, but not enough to distribute to all participants...
Logged
 

Read
« Reply #46 on: October 22, 2020, 09:54:40 PM »
K K Iyer
Global Moderator
Forum Hero
*****

Reputation Power: 54 
K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Intermediate
Posts: 4558
Join Date: Jan, 2012



I have some Tan Super Sport rubber, but not enough to supply to all participants as part of the kit.

Freeflight has agreed to limit himself to office use rubber bands and not use Tan.

The prototype and the first four kits weighed 8gms with nose weight.

In the next four, Iím trying to get it down to 7gms. I can skip the dope finish (0.5gms), but I donít want to do that. Plus Iím planning to use silicon polish!

The next 4 wings are 2.5gms each.

25F15644-DFC2-44C6-A971-D5FA65D73200.jpg
Re: 2nd Chuck - Lunchbox
* 25F15644-DFC2-44C6-A971-D5FA65D73200.jpg (75.86 KB, 626x640 - viewed 7 times.)
Logged
 

Read
« Reply #47 on: October 22, 2020, 11:22:36 PM »
K K Iyer
Global Moderator
Forum Hero
*****

Reputation Power: 54 
K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Intermediate
Posts: 4558
Join Date: Jan, 2012



The balsa one is 8 gms
The foamy is 1 gm (shows zero on my kitchen scale)

Their performance is identical!
In test glides in the drawing room.

The difference will show up when the speed increases.
As in full power hand launch or catapult launch...

CB320C88-4101-488A-83E2-69735715AF53.jpg
Re: 2nd Chuck - Lunchbox
* CB320C88-4101-488A-83E2-69735715AF53.jpg (68.02 KB, 612x640 - viewed 12 times.)
Logged
 

Read
« Reply #48 on: October 22, 2020, 11:45:25 PM »
K K Iyer
Global Moderator
Forum Hero
*****

Reputation Power: 54 
K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Intermediate
Posts: 4558
Join Date: Jan, 2012



Wonder if anyone would be interested in this TLG LAUNCH SPEED ESTIMATE, posted by me 6 yrs ago...

http://www.rcindia.org/kites-trains-free-flight-and-all-others/tlg-launch-speed-estimate/

Twelve stop action shots here

http://www.rcindia.org/kites-trains-free-flight-and-all-others/for-the-5th-sweepstakes-first-model-k-k-iyer/msg181491/#msg181491



« Last Edit: October 22, 2020, 11:57:59 PM by K K Iyer » Logged
 

Read
« Reply #49 on: October 25, 2020, 11:26:04 PM »
K K Iyer
Global Moderator
Forum Hero
*****

Reputation Power: 54 
K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.K K Iyer is on the verge of being accepted.
Offline Offline

City: Indore
State: Madhya Pradesh
RC Skills: Intermediate
Posts: 4558
Join Date: Jan, 2012



4 kits sent
6 kits under way
4 booked.
2 available
Logged
 

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

Related Topics
Subject Started by Replies Views Last post
First Chuck Glider « 1 2 3 4  All »
Kites, Trains, Free Flight and All Others
rajathv8 91 40771 Last post January 08, 2019, 10:25:33 PM
by VC
Tamiya vanessa`s lunchbox demolition derby, extreme tuning.
Cars
cookies racing team 1 2688 Last post January 09, 2015, 12:22:01 AM
by sundaram
Chuck gliders
Wanted
satz flying 0 834 Last post June 12, 2015, 06:09:12 PM
by satz flying
Chuck key stuck with chuck. How to separate?
Chatter Zone
taksh 9 1385 Last post April 15, 2018, 08:56:11 PM
by K K Iyer
Various type of Chuck gliders and Chuck glider parts for give away
For Sale - Completed
Mohammed Naveed 3 558 Last post January 13, 2020, 09:43:10 PM
by Mohammed Naveed