Author Topic: Yak-75 "Flapper"  (Read 28621 times)

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Offline Gondor

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Yak-75 "Flapper"
« on: February 10, 2014, 02:38:43 pm »
The Yak-75 "Flapper" is my entry for this group build. So far no pictures or back story other than what is below, just a fair amount of progress on the build and finally an aircraft manufacturer and aircraft number!

The basic idea is that Yak try to get back into the Fighter building game but for political reasons mainly they fail to gain support for their design loosing out the MiG with their Mig-29.

I will flesh that part out in time. So far the fuselage is together as are the wings and tail surfaces. Next step is a few little modifications and general cleaning up of the fuselage, filling sink marks and fixing seems etc.

Gondor
My Ability to Imagine is only exceeded by my Imagined Abilities

Gondor's Modelling Rule Number Three: Everything will fit perfectly untill you apply glue...

I know it's in a book I have around here somewhere....

Offline Captain Canada

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Re: Yak-75 "Flapper"
« Reply #1 on: February 10, 2014, 05:46:13 pm »
...so it's based on a Mig-29 ?

 :tornado:
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Offline Dizzyfugu

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Re: Yak-75 "Flapper"
« Reply #2 on: February 11, 2014, 12:23:59 am »
Yakovlev actually did a competitive design to both MiG-29 and Su-27 (the eventual concept winners for a tactical and heavy fighter), it did not look unlike the Bristol 188 with a Draken-style double delta wing. But this remained paper projects. Looking forward to see your take on this!  :thumbsup:

Offline Gondor

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Re: Yak-75 "Flapper"
« Reply #3 on: February 11, 2014, 11:12:20 am »
...so it's based on a Mig-29 ?

 :tornado:

errrrr no. I said "loosing out the MiG with their Mig-29"

I have based part of my design on a research aircraft by MiG but the rest is nothing to do with them even if it will look a little like a MiG 29.

Dizzyfuge, I always like to put an element of truth in any story, it helps confuse the JMN's. Neither the Yak-75 or Flapper designations were taken so I thought they might fit.

Gondor

My Ability to Imagine is only exceeded by my Imagined Abilities

Gondor's Modelling Rule Number Three: Everything will fit perfectly untill you apply glue...

I know it's in a book I have around here somewhere....

Offline Dizzyfugu

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Re: Yak-75 "Flapper"
« Reply #4 on: February 12, 2014, 12:42:07 am »
No doubt on both - I just wanted to throw in the fact that Yakovlev actually had something on the drawing board for your historic occasion "slot" - so it has that grain of truth that will make a good foundation. Looking forward on your take!  :cheers:

Offline Captain Canada

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Re: Yak-75 "Flapper"
« Reply #5 on: February 12, 2014, 04:41:37 pm »
...that's why I asked. Figured if it were in the same competition it would look like a Mig-29, and maybe you'd use a Mig-29 as a basis.

 :blink:
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Offline Dizzyfugu

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Re: Yak-75 "Flapper"
« Reply #6 on: February 13, 2014, 12:09:06 am »
No, certainly not. The Yak design had a much different layout - the Bristol 188 comes close for both fighter designs, but both had, IIRC, a tandem landing gear with outrigger wheels under the wing nacelles, and double delta wings with a very high sweep inside of the engine nacelles. The MiG-29 contender was a single-seater, while the Su-27 alternative was considerably larger, with a tandem cockpit. IIRC (too), those aircraft had the semi-official designation Yak-35/37. Both would be nice whif projects, too!

Reminds me that I have a MiG-33 (also a tentative name, it was a real F-16 style export aircraft, that never materialized) on the whif agenda myself...  :rolleyes:

Offline Gondor

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Re: Yak-75 "Flapper"
« Reply #7 on: February 13, 2014, 11:33:24 am »
The nearest to a MiG 29 that the Yak-75 is in some of its appearance. This should not be surprising as the TsAGI had come up with the basic requirements of an aircraft to meet the demands of the Soviet Air Force.
Twin fins, single cockpit with good all round vision, rough field performance and in the case of the Yak-75, canards and a chin intake.

Gondor
My Ability to Imagine is only exceeded by my Imagined Abilities

Gondor's Modelling Rule Number Three: Everything will fit perfectly untill you apply glue...

I know it's in a book I have around here somewhere....

Offline Gondor

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Re: Yak-75 "Flapper"
« Reply #8 on: February 25, 2014, 02:06:36 pm »
Some progress with this build. Putty has been applied to areas of the underside of the fuselage and locating holes started for the fins. Might post some progress pictures later this week.

Gondor
My Ability to Imagine is only exceeded by my Imagined Abilities

Gondor's Modelling Rule Number Three: Everything will fit perfectly untill you apply glue...

I know it's in a book I have around here somewhere....

Offline Captain Canada

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Re: Yak-75 "Flapper"
« Reply #9 on: February 25, 2014, 02:48:47 pm »
I like the sound of this !

 :cheers:
CANADA KICKS arse !!!!

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Offline Gondor

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Re: Yak-75 "Flapper"
« Reply #10 on: March 03, 2014, 11:01:26 am »
Some pictures to show that I am actually doing some work on this build and a helpful tip too.     :blink:

First up a picture of the filling that I talked about earlier.


That comes from converting a non eastern block aircraft to an eastern block aircraft!


       TIP of the Build !

So how do you make sure that a pair of twin fins are the same distance from the centreline of the aircraft?

Here is how I do it!

1) Start by making a slot there you are sure one of the fins need to go.


2) Cover and trim to shape some thin semi transparent material. I have used baking parchment here. Make sure that the material is secured in its position which should cover all of the slot that you have made.


3) Using your favourite sharp instrument, other than your wit, carefully cut away the material covering the slot. Shown here is a Swan-Morton handle with a fairly new number 11 blade. You may find that you need to perform the equivalent of some Brass-Rubbing over your locating slot to help define the edges. (why does everyone say use a "new" number eleven blade in the magazines?)


4) Remove the "template" you have now made and rotating it along the edge nearest the centreline of the aircraft, tape it into position. If you were careful enough to cut it to shape you should now have a mirror image of where the slot should be on the opposite side of the aircraft.


5) In this picture I have used a black pen to cover all the material that is within the slot I had previously cut into the template. I make sure that it is completely covered by marking over the edges of the slot.


6) In this picture you can see the resultant black area on the silvery grey of the plastic. When this is removed it should be an almost perfect match for the existing locating slot.


7) As you can see below, its not 100% accurate but it is certainly good enough for this aircraft.


This technique works just as well for anything that requires two or even more locations to be marked for any subject where they need to be mirrored from one site to the other.

Hopefully more progress pictures soon, just don't hold your breath.

Gondor
My Ability to Imagine is only exceeded by my Imagined Abilities

Gondor's Modelling Rule Number Three: Everything will fit perfectly untill you apply glue...

I know it's in a book I have around here somewhere....

Offline NARSES2

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Re: Yak-75 "Flapper"
« Reply #11 on: March 04, 2014, 07:08:25 am »
Good tip  :thumbsup:
Decals my @r$e!

Offline Gondor

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Re: Yak-75 "Flapper"
« Reply #12 on: March 04, 2014, 12:02:59 pm »
Another Tip!!
















Don't lean to far to one side or you will tip over!

Gondor
My Ability to Imagine is only exceeded by my Imagined Abilities

Gondor's Modelling Rule Number Three: Everything will fit perfectly untill you apply glue...

I know it's in a book I have around here somewhere....

Offline NARSES2

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Re: Yak-75 "Flapper"
« Reply #13 on: March 05, 2014, 01:08:58 am »
That's older then me !!!!!!  ;D
Decals my @r$e!

Offline McColm

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Re: Yak-75 "Flapper"
« Reply #14 on: March 05, 2014, 10:26:26 am »
Thanks for the tips.