Jump to content
ericg

RAAF CAC Sabre. Finished. Thankyou Brick!

Recommended Posts

A quick break from the Hornet (I tend to jump around a bit) lead me to having a good think about a major problem that I was having with the Sabre. Running a straight edge along the bottom of each wing was revealing that the port wing had a fairly decent warp in it. Not just visible with the straight edge, it was easily visible with the eye and just wasn't acceptable for my display cabinet. I was offered a new wing from a good mate of mine but declined due to the fact that a lot of blending had taken place on the bottom fuselage between the wings to change the model into a CAC version. I thought it would be easier to fix the warp itself. Hot and even hotter water was poured onto it to attempt to straighten it but it wasn't working and that's where I left it.

 

IMG_72781-1_zpscjqrh61v.jpg

 

A more drastic solution was neccessary otherwise this model was going to spend alot longer on the shelf of doom. I cut the leading edge of the wing from root to tip and opened up the plastic and inserted a brass rod, glued it into position and straightened the wing before clamping the model with the wing flat on the workbench and re-gluing the join. A day of curing time and it is now as good as new.

 

One part of the model that I was keen to get right was Bricks name on the side of the aircraft. For that I enlisted my mate with an ALPS printer to print me up some decals. Will look really good once on paint. I am sure that high on Brick's bucket list is getting his name on the side of a 32nd scale Sabre, so there you go mate..... cross it off!

 

IMG_7280_zpsrb1yed5g.jpg

 

IMG_7281_zpsiwkfmx4n.jpg

Share this post


Link to post
Share on other sites

I dry fitted the model to its undercarriage and weapons etc to see how it is all fitting together at this stage. I often leave my model set up like this when I have finished the days work on it, just to keep me motivated when I am next back at the bench. It is pretty close to getting a coat of paint at this stage, and with only 2.5 weeks to run until Queensland model and Hobby expo, it has a good chance to make an appearance. Considering how much work has gone into the conversion, the small amount of work left seems insignificant.

 

IMG_7316_zpsqwbfubo3.jpg

 

I have almost finished the ejection seat. A little bit of a tidy up and a flat coat and it will be done.

 

IMG_7320-1_zpscaijefmu.jpg

Share this post


Link to post
Share on other sites

Eric..

 

EXQUISITE modeling and BRILLIANT build.

Its the BEST WIP thread I have followed... the Sabre looks GORGEOUS. . :wub:

 

Eric you are truly an awesome modeler... :bow:

 

To Mr Bricknell..

 

Brick... You know when you are a kid and being told a story ,where you sit cross legged

and mouth gaping ,following each syllable and word of the story as it gets more

and more exiting and AMAZING.... well Sir.... your accounts and reminiscing has ME hooked. .

 

 

truly Wonderful reading your posts about the Sabre.

 

and those photos of you show how you had fun flying such

a BEAUTY ..

 

 

THANK YOU. ..

 

Keep it coming..... I am happy to listen ... and this build is far more 'real' with you on board with Eric' s epic effluent modeling.

 

:yahoo:

Edited by MARU5137

Share this post


Link to post
Share on other sites

Good to see you are back at the forge, Eric.

 
Firstly, one small thing:  I noticed that, in your Rumpler build log, you mention that you encountered a vexing problem with the lozenge decals, as a result of which you spat the dummy and spent the next two hours in the foetal position underneath your workbench, refusing to come out.  So, may I ask a favour?  Next time you do that, could you get your better half to take a photo and send it to me?  I mean, I'd be prepared to pay good money to see that :)
 
For the folks following this build, I regret to say that the time has come for more reminiscing about my Avon Sabre days in South East Asia.  Yes, I can see the eye-rolls and hear the moans of dread at the prospect of being bored out of your minds by a fighter jock yet again; but, hey, I'm an old guy, so indulge me just a little.
 
On 17th October 1963, I was tasked to ferry a Sabre from Ubon in Eastern Thailand back to Butterworth in Malaysia for a major servicing.  With full internal and external (167 gallon) tanks, I took off on Runway 23, only to get a PV Ram failure just after the gear and flaps had come up.  The main symptom of PV Ram failure is pretty simple: you experience a sudden and rather annoying loss of thrust.  Quite a significant loss of thrust, in point of fact.
 
The PV Ram operates the swirl vanes on the Rolls Royce Avon, which are located just in front of the first stage of compressor blades.  It is operated by fuel pressure, causing the vanes to start opening, as I recall, at about 5300 RPM and finish opening at about 8000 RPM.  When the PV RAM fails at high RPM, the swirl vanes close, starving the engine of air.  Apart from the embarrassing loss of thrust, the other symptoms are pretty straight forward:  RPM stays the same, but Jet Pipe Temperature (JPT) almost immediately drops to about half what it should be.  There is no other failure that results in those symptoms, so I knew immediately exactly what had conspired to get my day off to a less than optimal start.
 
Take a look at that ejection seat of Eric's.  The full-sized one is vastly more comfortable than the Martin Baker seats in the Vampire Mk 35s I did my Wings training on, but also vastly less capable.  It was a pretty primitive device, even for the early sixties, and was not even close to zero/zero; in fact the minimum safe ejection altitude above ground was 1000 feet.  In any event, an ejection would have been out of the question with the built-up area of Ubon right in front of me.  That area also prevented me from immediately jettisoning the external tanks, which I desperately wanted to do, given that I just didn't know at that point whether I would be able to keep the bird airborne.  Everything depended on where I was on the drag curve at the speed I was at, so all I could do was nose-over and level the bird out right on the rooftops, keeping my eyes glued to the airspeed indicator, willing it to hold steady or perhaps slowly increase, and knowing that it could just as likely slowly decrease. I thought that, if I could just keep the bird airborne until I cleared the built-up area, I might be able to belly it in, if necessary, after I passed the Ubon jail and the Mun rivulet.  
 
I passed the jail below the level of the watchtowers (see photograph), and can still remember seeing the guard in the south eastern tower looking across at me with what was no doubt keen interest as I sailed past at pretty much the same speed I had when the failure occurred.  Good, I thought, at least I'm not going to make a fiery urban spectacle of myself today, even if I have to eventually belly this thing in to a rice paddy.
 
ubon%20map.jpg
 
Having made it to the edge of Ubon, I was about to jettison the tanks when I observed the airspeed increasing, albeit agonizingly slowly.  So I just held the bird on the deck for another couple of miles to see what speed I might be able to get up to before starting a very, very gradual climb and a very, very gentle turnback to the airfield.  Having decided what I was going to do, I called the tower controller to get my Flight Commander into the tower so that I could explain what had happened, what I intended to do, and hopefully get his blessing for that plan.  My Flight Commander agreed with my intentions, so I retained the external tanks (I was determined to recover the bird intact if I could) and orbited the airfield for about 50 minutes to burn out the fuel, always remaining in a position from which I could execute a forced landing if the engine finally gave up the ghost.  Eventually, when I was down to a safe weight, I landed the bird off a precautionary forced landing pattern.  
 
Next day, after the troops had replaced the PV Ram, I flew the bird back to Butterworth.  A glorious 2 1/2 hour flight out to Korat and then down over the Gulf of Siam in amongst the towering tropical cumulo-nimbus at 45,000 feet.
 
The reality was that, if the PV RAM had failed just a few seconds earlier, I would have spread myself and a jet laden with fuel all over beautiful downtown Ubon, no doubt killing and maiming a good many people.  But the curious thing is that the incident never affected me in the slightest.  I slept soundly on the night after the incident with not a worry in the world.  A couple of days later, I thought that this thing would catch up with me sooner or later, but it never did.  I guess that was because, when you're young, you not only think you're invulnerable, you actually know you are - even in the face of incontrovertible evidence to the contrary.
 
Nope, it didn't concern me at all back then.  But these days I very occasionally think back on the time I came, literally, within 10 or so seconds of buying the farm and almost certainly killing and maiming a lot of innocent people on the ground, and it makes me think a bit.  What would my last thoughts have been when I realised that I was about to clobber that heavily populated area?  I mean, there are few things worse than being faced with a really dicey situation and knowing that you can do nothing - absolutely nothing - but just sit there and await your fate.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.

×