RC India

Hey guys !!
 Started a new scratch build project HAL HT2 aircraft designed by HAL,Bangalore in 1953 for Indian Navy and Indian Air Force...didn't got plans online so used some pics for creating it....
its a Work In Progress..

Great going yash......would love to see this in person

More pics

Help needed with canopy i am using transparent files for making canopy but would love to get some other suggestions...

looks good man! i'm probably going to build it too ;D

Cut it out of some 2lt coke or pepsi bottle, whichever bottle suits.

thanks man really i couldn't think of that :P

not into for some days waiting for my hk parcel to arrive with motors,cleves and other building materials...

Painted main wing,elevator and rudder(silver paint)

If you're looking into buying some small rc stuff like clevises, motors or props, check out www.rcbazaar.com and www.rcdhamaka.com located in bangalore, they usually have basic stuff in stock all the time. might save you excessive shipping costs and customs hassle ;D

looking good, i painted my air boat silver too, today ;D
http://www.rcindia.org/boats/my-first-boat-build/msg145481/#new

hey thanks for the appretiation....was wondering how u have written the boat name on the body?

I painted a black patch, masked it off with that text sticker i got cut from a local sticker shop and then sprayed silver over it and the removed the text sticker to  reveal the black underneath. basically, just masking.

Progress in the fuselage :)

Done just a temporary taping... will hot glue it after i receive the motor and battery...... :)

looking good, waiting for the flight :D

Hi Yash,

wow! design

i am building my first foamie,

may be a stupid question but i want to know how the wings are attached to the fuselge, i am struck there plz suggest.

U can use hot glue or foam safe glue to attach...many people also use magnets to give extra strength... And don't forget to use carbon fiber rod for reinforcement.....
GL for ur build
Regards
Yash

Hi Yash,

Thanks for the reply, how ever my query was attaching 2 independent wings to the fuselage as against the simpler single piece wings.

Your wings look like flat wings the doubt  that i had was since the contact area of the flat wing against the fuselage is very less will it be a rigid fix?

so the carbon fibre rod/ bamboo rod be glued(inserted in to the two separate wings) through the fuselage

also wanted to know if flat wings generate lift equivalent to airfoil shaped wings???

Pls suggest. :help: :help: :help: :help: :help: :help:

Sharath

you could try using bicycle spokes for strength.

In the image, i used angled bicycle spokes to get a proper dihedral angle and also strength, it will give you an idea of how to do it.  :thumbsup:
and you can see how it turned out in the completed wing, pretty sturdy.

Airfoil wings generate more lift than flat one that a simple answer..but acc to my design i can't use airfoil one i have used 10mm depron for wings for airfoil i need a more than one 5mm sheet to make wings...u can say i was saving sheets as i have to bring it from delhi..but as u wish both have pros and cons and anjan idea is also interesting u can try that..
If any more query call me +91-9651790707
Regards
Yash

i dont understand why you say your models cannot have an aerofoil profiled wing. besides depron isn't the only way you can build strong wings!
Time for you to build a hot wire cutter, brother. i get  my 2'' thick high density styrofoam from a local shop, they sell it as insulation thermocol, pretty cheap compared to depron. you can hot wire nice wing ribs with it, i glue the ribs together and use an aluminium U-channel at the CG line for strength and use packing tape over the styrofoam to prevent it from cracking and breaking in a crash.

very good - you are better than many in your craftsmanship

Man u give us some much inspiration thanks for telling me i am wrong i will definately try that :D

Progress  :)
Recently installed motor mount with araldite will leave till morning  8-) ....made pocket for battery will stick it with velcro  :giggle: ...having some problem on installing servos for elevator....can't decide about putting two and connecting with Y-Cable or making a custom Y Bend wire  :headscratch: :headscratch:.. Any suggestions????   :help:

Connect the split flaps of the elevator with a bicycle spoke through the fuselage and just use one servo, it'll be alright. Use Araldit to glue the spoke to the elevator flaps.

didn't get u any pic or diagramm...

You want both flaps of the elevator to work in synchrony, for that you're planning to parallel two servos each connected to one half of the elevator. That's your idea, if I understand correctly.

My idea is, for both halves me the elevator to work together, they have to be connected together. To connect then together, glue a bicycle spoke cut to the end-to-end length of the elevator flaps. Glue it on the hinge side. To glue it on the hinge side, the fuselage is obstructive, so make a small hold through the for the bicycle spoke to pass through and connect both halves of the elevator.

Sorry, I can't post pics. On my phone.

so by that connecting to one side of the elevtor will move both?
can i use .9mm steel wire instead or spoke or push rod??

Use anything that's stiff enough to not bend.

ok will try that

It's looking really good. Great work, Yash

Thank You sir  :bow: :bow: :bow:
Will appreciate any suggestions on the electronic part and more information about CG don't know much about it..  :headscratch:

Take CG @ 1/3rd the Wing Chord from the leading edge.

Re.: electronics, what's the model weight?

Around 750gms

A 1000grams thrust motor-prop setup should work.

Cant u tell me more abut cg i have to place cf rod for reinforcement

The CG usually lies at 25-30% from the leading edge.

Installed the main wing servo and engraved the line for CF rod...

Anjan: I disagree with you, For a high winger, 33% is OK. And Yash, in this case, because of the swept back wing, you may have to go 35% +

You might be right, sir ji. ;D

I usually go with 30% behind LE and I build only high wingers. Works well for me.

the engraving parallel to servo wire is final one and i used one cg calculator for that...as my battery will be at the end of the main wing so i think it will counter balance the nose heavy motor....

What's the CG calc estimation? Just curious ;D

30% Vs 33% - what are we discussing here - nano technology? Just fly the damn things and post the videos here - or else, you will end up like me - one dozen virgin models, all waiting to be maidened.

One dozen virgin models :rofl:

Nice choice of words  :giggle:

Yes VC, only a few more virgins, and Paradise has come to you  :giggle:

"and wilderness is Paradise enow"

hehehe ;p ..i had just asked for information on CG not on 30-33% leading edge..fact is i couldn't understand the concept of cg does it make the plane more stable or make it able to fly?? :)

I guess you try it out

Problems in my way  :banghead: :banghead:
I have connected the horns of the both seperate elevators but they are moving in opp direction so need some help in that case and also on the landing gear bought reinforced plastic one from rcb how to set up as i know the basic one but is their any specific way???

I didn't quite get you... why don't you put a torque rod between the 2 elevators?

Sent from a potato using a lamp

Turn one servo backwards

aniket do u mean join both elvator with a rod instead of joing with the horn???  and plz help for the landing gear

@sanjay sir .. used one servo for elevator as suggested by anjan...if i reverse it will be same

yash I am not getting your problem.
can you please post proper photos of how your elevator is rigged and of your landing gear...

Sent from a potato using a lamp

yash : don't make it more complicated  just do it in simple way, as aniket said, make a hole in fin and join the both elevator with CF rods or thin plate. ;)
still if you want to continue with that you can refer this image.

Your servo linkages are not proper. The torque rod must ad placed at the pivot/hinge of the elevator!

...

Aniket these landing gear need help on how to install plz explain by a diagram

anjan i didn't get you i was thinking abut joining both the elevators by a push rod or cf rod by making a hole in the fuse...will try dont know if it will work

These L/G are normally screwed in to the base of the fuselage, or fixed with a nut/bolt. Have used them on a corro model. Strong, but no springiness

@sanjay sir i got that thing of screwing but do u have to drill it cause it got no holes it it...

yes. To the diameter of the screw you want to use

this is the image of joining elvator

So put that rod at the hinge point, or with the current setup, you'll have to but one space for that rod to travel freely as it will take the path of an arc when the elevator moves

yeah made an arc angle for the moving space but will it work???

Try it!

update:-
just got my hand cut by blade...  :-\
lost 10ml of my precious blood hehehehe.... :giggle: :giggle: :giggle:
got little scolding from mom but its ok it happens..  ;)
will hold this project till 19th july will then continue and also got test on monday will try my best for it with my hand cut  :thumbsup:

Yash  :hatsoff:

Comepleted the fuselage,horizontal stabilizer and vertical stabilizer and its ready for paint only have to complete the canopy waiting for shipment with scale pilot...
Maybe finish everything by sunday..:)
Regards
Yash

Landing gear also installed.... home made the wire is hanger one pretty easy to bend.. :giggle: :giggle:
Now only paint some decals and canopy.. :thumbsup: :thumbsup:
Regards
Yash

With ref to your post nos. 66 and 67:

1. This is a beautiful model - DON"T RUSH IT. You will ruin it and won't be happy with yourself.

2. Don't push yourself to a deadline unless you are building for a competition or some other event that has a target date attached to it.

3. ENJOY THE BUILD PROCESS.

Well done!

Thank You sir will surely keep it mind the hurry of finishing it is because i have to concenterate on my studies so its better to finish it as early as possible then thinking about the model day and night.. :P

My models have sat gathering dust for months and years in a half completed stage. Get down to modelling ONLY when you want to do it. The HAL HT2 is a beautiful build - take your time on it. You have a rare talent. God bless.

Thank You sir   :hatsoff: :hatsoff: :hatsoff:
 it is only because of all the senior members suggestions and helpfull nature that i have been able to build this i have learned many mistakes from my first one with loads of hand cuts  :giggle: :giggle: :giggle: but for gaining something u have to sacrifice something..   :bow:
So i dont mind these small cuts with the satisfaction of self build model which is indian made and not any fancy warbird  ;D ;D ;D
Will put some IAF decals for the tribute to their greatness and courage...  :salute: :salute: :salute:
Regards
Yash  :hatsoff:

Excellent progress  {:)} {:)}

Thank You sir!

sacrifice and all is all okay, but please don't sacrifice your fingers... :P

will keep that in mind aniket  :thumbsup:
currenty planing for a home made stand for this beauty  :giggle:

Update:
Display stand made for HT2  :thumbsup:

Fiber glassed the fuselage :)
One question  :help:
How much time do have to leave it to set???

Regards
Yash

Depends on what epoxy your using.

Painted the fuselage ;D
The wide angle one shows my painting area my rooftop  :giggle: :giggle:

Regards
Yash

Coming along real good! Keep a check on the weight :D

Thank You Sir... ;D
it would be around 2 - 2.25 kg with all electronics installed... will post a new topic about specification.. and will try to make a plan for this for other people who are willing to build indian made planes with the help of sketchup....
Enjoy :)

Joined the wing section nearly complete....just need to do the decals and canopy...not getting time for the build busy in studies so i will be able to make the canopy by Monday...

2 ~ 2.25 Kg.....ouch! :o :(

Yes, ouch.
My models of similar size are usually 400 grams, at max.

what did you use to make it? sunboard??
also, 2 kg without aerofoil is bordering on risky isn't it?

2-2.5kg is not known i just did guessing  :giggle: :giggle: maybe it would be 1-1.5kg dont really know :D will need someone weighing scale for that and most of the weight is of electronic... all included with battery. will ask someone to lend me weighing scale then will confirm :P

Overview of the plane and just forget that weight part ;D  
http://www.youtube.com/watch?v=T2-OdHg3Pwo&feature=youtu.be
Test Run (At home) :P  with just 30% throttle
http://www.youtube.com/watch?v=bLhR5VjiihI&feature=youtu.be