Nothing, nothing, nothing flies like Senior Telemaster! Of course, this enthusiastic exclamation is advertising, but it should be sincere as well, even more than only a little.
Telemaster was likely designed by Karl-Heinz Denzin, a well-known German model designer. The rights on the model had Alexander Engel, who produced it in his own factory. Later, he gave license to Jim Martin, owner of HobbyLobby and the model was redesigned and produced by the well-known Joe Bridi.
Originally there were three sizes, the "standard" Telemaster, Senior Telemaster and Junior Telemaster. They had 1.8 m, 2.4 m, and 1.24 m wing span, giving the nice round numbers of about 6 ft, 8 ft, and 4 ft in Imperial units. Today there are also a Mini and Micro Telemaster and even the 12 ft Giant Telemaster.
Due to their high-lift airfoils, Telemaster and Telemaster-Senior are very well suited for special tasks like banner tow, leaflet or parachute dropping, aerial photography, etc., but they are suited only for rather simple aerobatics.The Telemaster became famous in Europe as one of the original planes was used to
carry a line across a chasm for building a bridge. First a small line was carried across and once done, larger and larger lines were pulled across. This is the claim to fame for the Sr. Telemaster. Probably the first industrial use for a model airplane.
This aircraft design has been around for a number of years in Germany, and has been
used to string telephone lines across deep ravines, which task would otherwise require
the use of a full-size helicopter
This model is - as far as is known - the first workhorse of the air and was rigged for banner and glider tow, photography, as well as candy or skydiver dropping. In the USA, the model even became famous because it helped running a power line across a chasm and saved hefty helicopter expenses.
Fuselage build
4 mm corro used, with 1.5 mm light ply. Front former and firewall are 8 mm Poplar ply, 2nd former 3 mm ply, all others 4 mm balsa. Triangular stock craved out and used for reinforcement
(https://i.postimg.cc/cHcdPn5N/IMG-20200701-182212.jpg)
(https://i.postimg.cc/90Fc2Qvw/IMG-20200701-182218.jpg)
(https://i.postimg.cc/qvC44YZw/IMG-20200701-182232.jpg)
(https://i.postimg.cc/m2nTxRVh/IMG-20200701-182248.jpg)
(https://i.postimg.cc/N0qYM43c/IMG-20200703-174232.jpg)
The table is 8 feet long
(https://i.postimg.cc/FFD9Z0Ly/IMG-20200703-174241.jpg)
(https://i.postimg.cc/PrJdFNWB/IMG-20200703-174257.jpg)
(https://i.postimg.cc/vBXd0dcY/IMG-20200703-174407.jpg)
(https://i.postimg.cc/qqqmYdS4/IMG-20200704-090046.jpg)
The history of this model was quite fun to read!!
Looking forward to the build sir!
Quote from: asperised on July 04, 2020, 05:34:27 PM
The history of this model was quite fun to read!!
Looking forward to the build sir!
Glad you enjoyed it!
Hoping for the best here. Weight is a challenge
plans available sir?
Plenty available. Outerzone, Aerofred ++
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Quote from: sanjayrai55 on July 04, 2020, 05:37:36 PM
Weight is a challenge
Sirji,
Weight is the last thing to worry about.
The original balsa one was under 6 lbs (2700gm)
I doubt if your Coro version will exceed 5kg (11 lbs)
It has nearly 10 sqft wing area, and can surely carry 2 lbs/sqft loading.
So you have 3-4 kg of spare capacity for payload!
BTW, what engine? 60?
Krunal has just built a lovely 10ft span Bird of Time airframe. I think he's still experimenting with the covering materials I sent him!
Now you're building an 8ft span Sr Telemaster.
And here I am, building another 24" Indore Bipe for the Guy asking for Telemaster plans...
Wonder when I'll grow up and build
real model airplanes ;D
Regards
The performance of the original @ 2700 gms was superior to the performance of the RCM/Joe Bridi? Hobby Lobby version, which would got to 4500+ gms. That's why I'm trying to make it as light as possible, though I doubt I'll be going below 4 Kg
Planning to use a OS 55 AX with 12*6 prop for now. Let's see how it goes
(https://i.postimg.cc/qqqmYdS4/IMG-20200704-090046.jpg)
Testing tank fitment
Tail feathers
The vertical stab is from 6 mm solid balsa
The horizontal "lifting" stabilizer is fabricated from balsa, and corro
(https://uploads.tapatalk-cdn.com/20200705/89c08c668c4172c2f04611d3d081f3a7.jpg)(https://uploads.tapatalk-cdn.com/20200705/e3e7148e1ee1d4648ac72ec61a0b9c38.jpg)
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The vertical stab slots into the provision made in the horizontal, and will be epoxied in later(https://uploads.tapatalk-cdn.com/20200705/e6f51eeffae4b037356613e74ac7e802.jpg)
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Neat and clean build as always!
Waiting to see it fly!
(:|~
:thanks: Prabal
Rai Sir,
Looking at your build on Senior Telemaster, I could not stop myself writing on your thread. It freshened up my memories about a Balsa Senior Telemaster I had in my possession 15 years back and one line that holds true about this model is
"Nothing flies like a Telemaster".
It is a dream machine.
Telemaster is a sheer pleasure to fly and watch. It is the best trainer that has ever been produced. It has good glide ratio and I was never able to land it in single attempt. Just at 4 to 5 ft height, it used cover the whole ground. It simply refused to land even on idle. Spoilers were badly needed.
I will eagerly watch this thread of a creation by a master builder as it takes shape of a Master of flying.
Wish you a good luck on your build and eagerly await flight vedeo.
Thanks so much Dreamliner
Stabilizer
Seat
(https://i.postimg.cc/DzvLr3pV/IMG-20200707-112703.jpg)
(https://i.postimg.cc/YSdg8DTv/IMG-20200707-182036.jpg)
(https://i.postimg.cc/HkCQLyQk/IMG-20200707-182113.jpg%5Bs%5D%5B/s%5D)
(https://i.postimg.cc/XYc9BY8c/IMG-20200707-182052.jpg)
Starting to Appreciate the size of this aircraft!!
Elevator
(https://i.postimg.cc/dtdK9pD6/IMG-20200709-161657.jpg)
(https://i.postimg.cc/WpdVdhvQ/IMG-20200709-161702.jpg)
(https://i.postimg.cc/kMLmKqMD/IMG-20200709-161707.jpg)
(https://i.postimg.cc/7LD1b17F/IMG-20200710-161446.jpg)
(https://i.postimg.cc/Sxc7y1XL/IMG-20200711-163628.jpg)
Tail assembly glued on to the fuselage
(https://i.postimg.cc/rFBN22pF/IMG-20200713-173839.jpg)
(https://i.postimg.cc/CLKJCpvc/IMG-20200713-173833.jpg)
:salute: :thumbsup:
One more super build coming out from sanjay sir
Thanks Shirsa and Manoj :thanks:
Been a bit buy. But finally started on the wing
(https://i.postimg.cc/g2Q48T5c/IMG-20200723-162913.jpg)
(https://i.postimg.cc/Dw8BWTxY/IMG-20200723-162925.jpg)
(https://i.postimg.cc/jjwBPNSN/IMG-20200723-183351.jpg)
Very nice work sir. Is this 6mm ply?
Thanks. No, actually it's hard wood, what they call locally "margin"
About 6 mm X 50 mm. Small layer of 1.5 mm balsa on top
Good build Sir, I have built many version of the telemaster.
You should add the Aileron servo ply mount before folding the wing.
regds
good going sir {:)} {:)} {:)}
Thank you Sandeep and Gaurang
(https://i.postimg.cc/7hGSbd50/IMG-20200725-124246.jpg)
Ready for gluing an folding
(https://i.postimg.cc/sfqpbjLc/IMG-20200725-154542.jpg)
Right wing folded and glued
(https://i.postimg.cc/26T0nsjt/IMG-20200725-154549.jpg)
You can see the cutout and reinforcement for both the Aileron and Flap
Wing folded over(https://uploads.tapatalk-cdn.com/20200725/53350715abfa5dbd8ca5c909a5115460.jpg)
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whats the total weight of the wings sir?
It's 1100 gms. Without servos which will be 200 + ~ 100 for horns pushrods etc. Plus the weight of Ailerons and Flaps which I still have to make
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sir as ur excellent in this job
i would to see linakage stopper and its push rod in this plane
kp
Quote from: kamalsahai on July 26, 2020, 09:56:09 PM
sir as ur excellent in this job
i would to see linakage stopper and its push rod in this plane
kp
OK, will take some close up shots when I install them
Started on the Flaps
(https://i.postimg.cc/hPnQ5MsX/IMG-20200730-181608.jpg)
(https://i.postimg.cc/mZCFjKYx/IMG-20200730-181624.jpg)
(https://i.postimg.cc/xTPNDHpt/IMG-20200730-181826.jpg)
Reinforcement (Balsa block) at Horn location
(https://i.postimg.cc/Y9Z5zPqm/IMG-20200801-121127.jpg)
Flaps and Ailerons construction completed
(https://i.postimg.cc/qqK9bGzD/IMG-20200801-172137.jpg)
Hinging done on Ailerons and Flaps
(https://i.postimg.cc/44hkxXBv/IMG-20200811-180623.jpg)
Nice to see your builds sanjay ji. What size engine are you planning to use ?
Regards
Sahil
Quote from: sahilkit on August 16, 2020, 09:30:30 PM
Nice to see your builds sanjay ji. What size engine are you planning to use ?
Regards
Sahil
http://www.rcindia.org/gas-glow-nitro-planes/senior-telemaster-(adapted-in-corrobalsaply)/ See Reply # 11
Testing the Servo set-up for 2 position Flaps and Triple Rates on Ailerons
https://www.youtube.com/watch?v=dOzamJ4wrWs
https://www.youtube.com/watch?v=pKXP7B4NhiY
Amazing Sanjay Sir.
Eagerly waiting to see it finished :)
Please take a bow!!
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Thank you
Testing after assembly
https://youtu.be/gA5nk5X8wMg
https://youtu.be/X7FKHpOseDU
Detail of linkage for Flap
(https://i.postimg.cc/yNxPfNRh/IMG-20200818-173324.jpg)
Making the Hatch Cover
(https://i.postimg.cc/2S8F650p/IMG-20200820-103951.jpg)
Hatch Cover
(https://i.postimg.cc/PJ0sqck9/IMG-20200822-092618.jpg)
(https://i.postimg.cc/440TwKhP/IMG-20200822-092637.jpg)
All parts which could be exposed to fuel/exhaust protected with Synthetic Enamel paint
After a long time - now in completion
(https://i.postimg.cc/FRL4QVww/IMG-20210320-170218321.jpg)
Decided to go with a 15 cc Evolution Gas engine
The additional weight was perfect for the CG
(https://i.postimg.cc/brr1Jd9X/IMG-20210325-181609731.jpg)
(https://i.postimg.cc/WzygJj5d/IMG-20210325-181532205.jpg)
Wing Top
Wing Bottom
(https://i.postimg.cc/mZpQnNTT/IMG-20210325-181416002.jpg)
Sanjay sir I am also thinking this pattern .Very beautiful build. How is its flying, and which engine your are using, what is total weight .
with regards
:thanks:
Evolution 15
Not maidened yet
About 4.7~4.8 Kg
Sir,
I believe 'nothing flies like a Telemaster'
Yours is about 8' span, right?
I was wondering why you added flaps, perhaps the last thing a Telemaster needed.
The original weighed under 6 lbs, had wing loading under 9oz/sqft and took off in 3 feet with a 60!
Then I noticed the weight. Over 4.5kg, eh?
But at nearly 10sqft wing area, it'll still only be 16oz/sqft loading, or only 80% compared to a 40 size trainer.
So why a 15cc engine and flaps?
Guess you plan to carry a huge payload!
I wish I could get a few minutes air time on your Sr Telemaster!
Regards
Thanks for reply ,evolution 15 that 15cc ? its petrol or glow.
Res.Iyer sir my senior Telemaster weight is 7.5kg and engine .90Super Tiger , it's fly well , but I want to know what should it's ideal weight.
Quote from: K K Iyer on March 26, 2021, 08:57:42 PM
Sir,
I believe 'nothing flies like a Telemaster'
Yours is about 8' span, right?
I was wondering why you added flaps, perhaps the last thing a Telemaster needed.
The original weighed under 6 lbs, had wing loading under 9oz/sqft and took off in 3 feet with a 60!
Then I noticed the weight. Over 4.5kg, eh?
But at nearly 10sqft wing area, it'll still only be 16oz/sqft loading, or only 80% compared to a 40 size trainer.
So why a 15cc engine and flaps?
Guess you plan to carry a huge payload!
I wish I could get a few minutes air time on your Sr Telemaster!
Regards
I compute Loading at 19 oz/sq ft, WCL at 6.5. About a trainer
But I've kept flaps because the ends of our runway have crops growing - sarson nowadays. Overshooting will create problems
Weights of modern STMs range from 4.5 Kg upwards. There really is no "standard weight"
The 15 cc Gas engine is because it balanced the CG perfectly!
A 15 cc Gasser, while being ~ 0.90 cu in displacement, does not have the power of a 90 Glow, more like a 60 Glow. The BMEP and RPM are both lower
BTW, the STM has a reputation of being a floater! It just doesn't want to land
I installed flaperon mixing. it really awesome .
:thumbsup: :thumbsup:
Really excellent build, Sanjay.
Colour scheme is your independant ?
Eagerly awaiting its maidening video... :hatsoff:
Thanks Projjal
I adapted the colour scheme from a photo on the net
Maiden planned soon
Finally complete
(https://i.postimg.cc/BvC0Lnhd/IMG-20210330-182057653.jpg)
(https://i.postimg.cc/R0mmZHT7/IMG-20210330-182036993.jpg)
(https://i.postimg.cc/jdGKB9wk/IMG-20210330-182048245.jpg)
(https://i.postimg.cc/DZyKq3Hm/IMG-20210330-182112430.jpg)
Sirji,
Do you post your builds internationally?
Like on RCG?
There will be a worldwide audience!
Regards
That is just plain Gorgeous ! Master Quality build.
The lettering appears to be vinyl? is that a correct guess? Can you tell us the source to get these vinyl sheets and you must be printing on your ink or a laser jet printer ? Love the design.
Wishing you the best on your maiden.
Hi Freefflight,
You can get Vinyl lettering Sheets from Office Depot stores.
Quote from: K K Iyer on March 31, 2021, 08:35:56 PM
Sirji,
Do you post your builds internationally?
Like on RCG?
There will be a worldwide audience!
Regards
Not really. I had posted a couple of times, but there is limited interest in Corro. There was another forum dedicated to SPADS but that shut down
Quote from: Free Flight on March 31, 2021, 09:14:31 PM
That is just plain Gorgeous ! Master Quality build.
The lettering appears to be vinyl? is that a correct guess? Can you tell us the source to get these vinyl sheets and you must be printing on your ink or a laser jet printer ? Love the design.
Wishing you the best on your maiden.
Thank you
The lettering (and the orange/red trims) are sign vinyl. For lettering, there are plenty of number plate/signboard manufacturers, who have a computerised machine. Just takes a few minutes, and costs hardly anything
Superb ! master craftsmanship , a legendary Telemaster built out of scratch. {:)}
I have always wanted to build a Telemaster.
How long did it take to built it ?
About 60-70 hours
good job rai sir
kp
Thanks Jeetu and Kamal Preet
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My version of Telemaster built of 3mm coro and DLE 26cc installed.