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Author Topic: Y-BAR.  (Read 998 times)
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gossie
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« on: November 05, 2012, 12:58:49 AM »

Y-BAR 40in span power model from 1954 just about finished.

  I have a choice of DC Spitfire/Sabre or Webra Piccolo to fly it.  They are all the same width radial mount.  I have captive nuts behind the firewall.

With DC it weighs 220 grams/7.75 ounces, with the Piccolo 180 grams/6.35 ounces.  Weights are all up including prop, Seelig mini timer and eye dropper tank.
The CG is just in front of the TE with the Piccolo as per the plan.  It's about 65% with the Sabre. The model "feels" rather nose heavy with the DC engine in it so it shall be flown with the Piccolo to see how it goes.
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Y-BAR.
Y-BAR.
Y-BAR.
Y-BAR.
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DTox
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« Reply #1 on: November 05, 2012, 08:12:18 AM »

Hope your braces are up to it ... :}
(sometimes someone catches some really good pictures at the field)


Before and after .. actually, the 'after' was near the end of the climb.
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Re: Y-BAR.
Re: Y-BAR.
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gossie
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« Reply #2 on: November 05, 2012, 03:57:34 PM »

Nasty DTox, very nasty.  Guess it's fixed by now.

Braces on mine should be okay......well I hope so.  Time will tell I guess.

As a matter of interest what engine in yours and were is the CG?   Did it need any down or side thrust?  And how much does it weigh?
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PeeTee
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« Reply #3 on: November 05, 2012, 05:08:36 PM »

Gossie

Nice looking build.

A number of us in Blighty have had them on the go under the auspices of the Y Front challenge. An esteemed lurker (hello John) has built 2 or 3 in that time, powered by increasingly pokey motors - starting with an Elfin 149 and finishing with a Profi if I recall correctly. I've built the tail and wing panels, and have recently acquired a TeeDee 09 for power. Perhaps OTT, but I can cut down on the nitro and save money.

I have a few other models to finish beforehand - so what's new Roll Eyes

Peter
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gossie
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« Reply #4 on: November 05, 2012, 06:58:52 PM »

Thanks Pee Tee.   I have a spare TD.09 here but doubt I would be brave enough.  Maybe a TD.049 for Open Power as they are nice and light.....I have a radial mount for one as well......

I can't see me using one of the DCs in it.......It's just too heavy.  Piccolo is only 1/2 the capacity but starts and runs well so will stick to that for the moment anyway.

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Ployd
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« Reply #5 on: November 06, 2012, 01:49:29 AM »

Hi Gossie

I think DTox (hi Harry) is using a Webra 1.5 but he will confirm actual motor used. We all saw that flight so you have to build the wings STRONG!

Ployd in OZ
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DTox
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« Reply #6 on: November 06, 2012, 07:05:41 AM »

Yes, Webra 1.5, 300gm ready to fly (after repairs), about 5 deg left thrust and CG about 65-70%

With a 1.5 it is a tad overpowered, but that's what the plan says and it's good for Oz diesel and Vintage Smiley
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gossie
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« Reply #7 on: November 06, 2012, 07:10:03 AM »

Hi Pete.  I did suspect it might be Harry but was not sure.  It has a Webra Rekord in it and has been mentioned it's a "crazy thing".   He's a nice builder and the model looked good on launch was another clue that it was him.

The wings are not all that strong and as it is I'm reluctant to over power it.  It's nice and light and should be safe and docile with the Piccolo in it.....But who knows if it looks good?Huh

Hi Harry.   Did that rod fit I sent you down via PG?   See you in January I guess?HuhHuh
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DTox
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« Reply #8 on: November 07, 2012, 05:05:35 AM »

Rod is in the parts packet, with all the other bits, waiting for attention.
Unless otherwise instructed, by SWMBO, I'll be there in January Smiley
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ddock
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« Reply #9 on: November 09, 2012, 11:26:08 AM »

I used to fly a Y-bar in every Nostalgia class...TD.020 to OS .35...  Love em Smiley and had moderate success (not the airplanes fault). Stabs get pretty big as you enlarge them. Even with all the spars, you have to constantly check for warps.
DDock
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SP250
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« Reply #10 on: November 11, 2012, 12:42:43 PM »

Flew one as a youngster in Shrewsbury late 60's with a PAW 1.49 and I recall it being a very consistant flyer.  Didn't have any warp or trimming problems over the couple of years I had it. 
Then I discovered motorbikes and girls so modelling took a back seat.

John
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Ployd
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« Reply #11 on: November 25, 2012, 01:15:54 AM »

Another one bites the dust. DeTox flew his Y-Bar Saturday afternoon at out field at Springhurst and proceed to find the only tree in the field.
Note to self: add liberal amounts of "black balsa" in the fuselage for the inevitable tail slid out of the tree and on to "firma terra"

Ployd in OZ
Attached files Thumbnail(s):
Re: Y-BAR.
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gossie
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« Reply #12 on: November 25, 2012, 02:54:18 AM »

Mmmmmm, no good.   Remember last time there for me I hit a tree in the Open Power flyoff that left me in second place. Roll Eyes
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