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Chris McG F-86 Sabre Dog build blog

my first attempt to a soaring bird for the PSSA MB 2020?

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McG 696907/08/2020 13:02:12
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3365 forum posts
1282 photos

Thank you both, gents. yes

Hope your commuting went ok, Dwain.

Even a bit hotter today here as well... I'm afraid I'll have only a 'short' session at La Grotte this afternoon. wink

Cheers & keep cool all

Chris

McG 696907/08/2020 21:02:35
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3365 forum posts
1282 photos

Hi there for those still alive,

As predicted, La Grotte was like a kiln oven when I got there. surprise

I still managed to have the TE fixed part ‘channeled’ to get over the torque rod.

1458_fixed_te_900.jpg

I used a homemade tool again to help me sanding the recess to be just over the bearings diameter.

I just forgot the take a pic, but no State Classified Secret at all… angel

It’s just a long Allen key receiving a layer of sanding paper to form a 5mm diameter unit, close to an ‘agricultural’ look but still a very usable sanding device.

1459_adjusting_aileron_900.jpg

I then made the final adjustments and sanding of the ailerons now being ready to be glassed later on.

With the hope to survive the session, I made a quick mix of my favourite Bob Smith epoxy, but alas the 30min-type started its polymerisation after just 15 min.

Not a great time to start glassing some bits at all here in BE… frown

Hakuna matata & stay cooled all

Chris

BRU - BE / CTR Temp #2 Control

john stones 107/08/2020 21:10:44
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11645 forum posts
1517 photos

Aye been a warm un Chris, hope yer Chocolates not melted. sad rose

McG 696908/08/2020 11:58:41
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3365 forum posts
1282 photos

Thanks, John.

Regarding the chocolates, as we consider our 'national' ones as being our 'Brown Gold', we are very cautious with them. wink

They now are safely stored in the refrigerator... yes

Together with our Belgian Jupiler Pils, albeit for a very different reason. cool

Cheers & best of luck with your Fantasy GP predictions

Chris

McG 696911/08/2020 17:59:46
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3365 forum posts
1282 photos

Hello again, gents.

No, I'm not having any holidays, neither was I charged in court for those seaside 'hot' riots in Blankenberge... angel

Talking about 'hot', well, that's the real culprit.

We do have an Official Heatwave here in BE with more than five consecutive days of a national average temp of more than 30°C... hot

The temp inside La Grotte is between 31 > 32°C on a constant base and even at night it's not really cooling down.

As this is supposed to be an hobby with some fun related to it, I'll patiently wait for the crisis to 'evaporate'.

Cheers beer & "we shall overcome..." note

Chris

Bob Jennings 114/08/2020 11:34:22
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163 forum posts
311 photos

A really spectacular build you have here Chris. Impressive craftsmanship and attention to detail. Where do you keep all your balsa dust and shavings???

McG 696914/08/2020 19:58:57
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3365 forum posts
1282 photos

Thanks for your kind comment, Bob.

Regarding the shavings, that's an easy one as I don't even own a small modelling razor plane.

I do have an 'adult' one - it belonged to my late dad back in the late fifties - though, but just being six y/o, I never was allowed to even touch it... crying

As for the balsa dust, my nose starts to itch quite rapidly, so I'm cleaning it up as soon as I can. angel

Cheers & stay safe, gents

Chris

McG 696918/08/2020 20:10:25
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3365 forum posts
1282 photos

Hello everybody,

Those who might have been thinking that I was having some hippie-style holidays in Kathmandu are totally wrong… angel cool

With some decreasing temps in BE, I finally had a session at La Grotte and decided to start it the ‘soft & easy-way’…

I was wondering if my aileron shrouds would allow the needed throws.


1465_aileron_throwup_900.jpg

GM Models’ plan states 20mm up and 8 down. I just needed to sand them back 1mm to obtain 21mm up and down bringing it back to 20 when glassed and some Sauce applied.

I suppose Phil’s ‘flaperons’ intention will be possible with the extra 12mm down?

1467_aileron_throwdown_900.jpg

Hakuna matata & stay safe all

Chris

BRU - BE / CTR Flaperons Control

Phil Cooke18/08/2020 23:01:14
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2647 forum posts
1851 photos

The fit on those looks great! On a low wing model like the Sabre I'd be in preference for draggerons over flaperons just to avoid damage on landing, that said a little droop for flap during flights on days with lighter lift wouldnt be a bad thing!

McG 696919/08/2020 13:31:06
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3365 forum posts
1282 photos

Thanks for your comment and advice, Phil.

To be honest, I have no clue regarding programming a Tx for either flaperons or draggerons... blush

In fact my knowledge of Tx / Rx stuff is very close to zero, but I guess some kind PSS-ers will assist me in due time...

Cheers & keep safe

Chris

McG 696920/08/2020 19:49:40
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3365 forum posts
1282 photos

Hi to all,

… a bit warmer again today in BE with 28>30°C, but nevertheless, being brave, I went to duty. angel

As I don’t have a razor plane - nor the supposed skills to handle it - I went for a template of rib R13 including the chord line with an excess ‘’safety’ of 2mm all around for the rough shape of the wingtips.

1472_wingtip_profile01_900.jpg

If I understood Phil’s idea correctly the thin ply reinforcement between the balsa blocks should end just between the LE and TE on the chord line of the wing. Hopefully… indecision

The coordinates were drawn accordingly and the excess blocks are removed with the fretsaw leaving just 2mm to sand.

1475_wingtip_profile02_900.jpg

One could easily get lazy with these temps, isn’t it? … blush

Hakuna matata & stay safe and cool

Chris

BRU - BE / CTR Laziness Control

Phil Cooke20/08/2020 22:26:12
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2647 forum posts
1851 photos

Yep spot on Chris, the thin ply should run right through the extreme L/E and T/E just as you've drawn. Will produce a lovely crisp and damage prove T/E!

McG 696921/08/2020 14:35:56
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3365 forum posts
1282 photos

Thanks for your confirmation, Phil.

Looking forward to attack them with the Permagrit block. wink

Cheers & keep safe all

Chris

John H. Rood21/08/2020 15:44:13
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272 forum posts
391 photos

Chris, all that detail discussion with Phil about the aileron torque rod linkage is very helpful for me.  Your workmanship looks very good.

Q: Have you thought about using an AIR CONDITIONING unit device in your workshop? Seems the heat is a real problem for you there.

 

Edited By John H. Rood on 21/08/2020 16:29:55

McG 696922/08/2020 18:01:18
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3365 forum posts
1282 photos

Thanks for visiting, John.

Been quite a long time now, so how is your Sabre build progressing?

Did you have a start with Dirk's canopy frame?

A: ... regarding the airco, I don't think it's really worth it as they are just 'heatwaves' but BE having a Continental climate it feels 'hotter' than if we had some seaside air/wind.

Anyhow, I'm not allowed to drill big holes in the walls at La Grotte.

Cheers & keep safe as well over there

Chris

McG 696923/08/2020 18:39:36
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3365 forum posts
1282 photos

Hello again,

The temps here in BE are slowly getting back to normal for this period of the year.

Nevertheless, next wasn’t the job I was ‘waiting’ for… frown

That is definitely gluing the fixed part of the TE around the aileron torque rod bearings.

I used what seemed tons of Vaseline, very carefully added epoxy to glue just one TE at the time.

I was also lucky with the second one moving totally free and consequently even thought it could be the right time to have an - well deserved - apéro… blush

This couldn’t be just luck, so instead of having ‘an early beverage’, I decided to glue the pre-shaped wing tips as well.

1480_wingtip_gluing_900.jpg

Hakuna matata & stay safe, gents

Chris

BRU - BE / CTR Epoxy Control

Dwain Dibley.23/08/2020 20:45:23
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1523 forum posts
1506 photos

Nice work Chris, as usual......winklaugh

Weather here is torrential rain, then more rain......................Cycling to work is very interesting............LOL

Cheers.

D.D.

McG 696924/08/2020 12:36:26
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3365 forum posts
1282 photos

Thanks for commenting, Dwain.

I can project that cycling isn't that fun in torrential rain, but I can imagine it wouldn't be during a heatwave, with 35°C in the shadow, either... hot hot hot

Cheers & keep 'dry', young man

Chris

McG 696925/08/2020 18:52:25
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3365 forum posts
1282 photos

Hello out there,

I had a quite long session, but unfortunately nothing much to show. blush

The wing got completely fine sanded both sides, a few dents & blemishes were filled with a mix of lightweight filler mixed with diluted PVA (25%). This gives a nice ‘sticky’ but light filler after drying.

I ended with the masking of the wing next to the wingtips.

1482_wingtip_sanding01_900.jpg

1487_wingtip_sanding02_900.jpg

Permagrit, here we come… wink

Hakuna matata & stay safe

Chris

BRU - BE / CTR Filler Control

McG 696926/08/2020 19:45:39
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3365 forum posts
1282 photos

Hi again,

An afternoon totally filled with balsa dust, I afraid… frown

Not a lot of words needed, I guess.

1489_wingtip_sanding03_900.jpg

1492_wingtip_sanding04_900.jpg

I must admit I’m well chuffed with the result. cool

Thanks again for the ‘ply-trick’, Phil. yes

Hakuna matata & stay safe all

Chris

BRU - BE / CTR Tips Control

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