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Author Topic: Show Your Newest Creation  (Read 62742 times)
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MKelly
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« Reply #1050 on: March 20, 2017, 08:46:51 AM »

Steve,

Very cool, and beautiful workmanship!  Looking forward to a flight report.

Mike
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ironmike
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« Reply #1051 on: March 20, 2017, 12:35:45 PM »

Very nice SB
Always loved aircraft done up in Czech markings
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SBlanchard
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« Reply #1052 on: March 21, 2017, 10:14:30 AM »

Thanks guys,

I'm gonna wait as long as I can stand it to get her in the air. The ground is not ready to receive scale stick and tissue yet. Still throwing stick jobs and sport jobs up in the air right now.

Steve
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BG
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Me with F1B - epic retrieval (flew 10km after DT)




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« Reply #1053 on: March 21, 2017, 02:40:48 PM »

Nice work Steve, I like this design for rubber jet twin. So, what is the weight?
B
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F1B guy but its not my fault, Tony made me do it.
SBlanchard
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« Reply #1054 on: March 22, 2017, 10:12:29 AM »

The weight right now without rubber is 56g. That includes the two balsa props. I'm not sure of the wing loading as I haven't figured out the area of the wing yet. When I do I will post the results.

Thanks,
Steve
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dosco
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« Reply #1055 on: April 02, 2017, 08:10:59 AM »

Here's my latest I've been working on for a couple of months now. It's an Avia S92, the Czech version of the Me262. It is exactly the same as the 262 but different color schemes that I preferred. Anyway, it is a twin rubber powered jet. All I have to do now is work on the front ends for each nacelle. I have the props already. Two hand carved balsa props that turn in opposite directions. The wingspan is 27.5" and the props are 6.5" each. Should have half a chance to fly. I'll wait for the safety of tall grass to try it out though.

Steve


Steve:
That is super tasty. Well done.

-Dave
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billdennis747
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« Reply #1056 on: April 04, 2017, 12:48:21 PM »

I've now made a crude engine for this 46" rubber hawk Moth so should fly soon. I'm not going to weigh it.
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Mefot
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« Reply #1057 on: April 04, 2017, 01:32:21 PM »

It doesn't look heavy Bill, but it does look delicate !!! Unusual looking prop. Is it a commercial or hand carved item?
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billdennis747
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« Reply #1058 on: April 04, 2017, 02:22:42 PM »

No it's not delicate; in fact a little diesel would suit it very well!
The prop is borrowed from Ivan Taylor's 36" rubber SE5a. The photo in fact catches it at a peculiar angle but it looks good
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FFmodeller
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« Reply #1059 on: April 04, 2017, 03:08:07 PM »

Not looking so crude from here  Smiley
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SBlanchard
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« Reply #1060 on: April 05, 2017, 12:24:22 PM »

It looks quite nice to me!
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p40qmilj
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love that P40Q



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« Reply #1061 on: April 16, 2017, 03:24:55 PM »

 Grin BEHOLD my 22 inch hurricane developed from rc plan powered by 3 loops 1/8 rubber flies great

jim Grin
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billdennis747
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« Reply #1062 on: April 26, 2017, 08:07:17 AM »

Ready for testing. I did weigh it - 9.5oz without rubber (1oz?) so it's 6oz per sqft. No ballast will be needed. Hopefully it will go well and be entered in the Nationals.
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dputt7
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« Reply #1063 on: April 26, 2017, 08:35:49 AM »

  Really neat Bill, hard to keep coming up with things to say about the models on here except could we please have some more photos  Grin
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Prosper
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« Reply #1064 on: April 26, 2017, 09:07:37 AM »

Hi Bill, with your DH high-winger experience and seeming memory of every model that's ever flown, you don't happen to know whether a Leopard Moth can fly FF with scale dihedral do you? The Leopard Moth has zero dihedral along the bottom of each wing, so the taper in thickness towards the tips actually gives it slight anhedral.

Stephen.
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billdennis747
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« Reply #1065 on: April 26, 2017, 10:11:22 AM »

Hello Stephen. I've never done a Leopard Moth; it has less wing area than a Puss and with its zero dihedral it looks sad and droopy. I always think you can add a little dihedral if there is some there to begin with (ie Puss Moth) but if there's none, it stands out.
The only example outdoors I know of was Eric Coates' version, which had about three degrees. It looked wrong.
I've never been one to say 'It'll never fly' but I suspect a flat wing Leopard Moth would be tricky. I know you like tricky! But for me it would be extensible struts to go from zero to 2 degrees in flight. With the sweepback, you wouldn't notice it in flight except on photos. I've got such struts on the Hawk Moth.
Or...pendulum ailerons
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Prosper
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« Reply #1066 on: April 26, 2017, 12:06:15 PM »

Quote from: billdennis747
I always think you can add a little dihedral if there is some there to begin with (ie Puss Moth) but if there's none, it stands out.
Absolutely! The trouble is, I feel the amount you can add is much in proportion to what's there to begin with - so an Auster with 1° per wing will only bear a fraction of a degree extra until it looks bad - in other words not enough to help much - whereas an Me 109 with approx 7° will bear one or two degrees more, but it's not necessary in the first place!

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. . .for me it would be extensible struts to go from zero to 2 degrees in flight.
Smart, I might do that. It may be quite fitting because after staring at many many Leopard Moth pictures I'm near certain that the wings lift in flight anyway, just a degree or so. Not very surprising given that the struts are hinged at the bottom and the wing is held on by one hinge and a bent paperclip or something at the front. Surprising they don't fall to bits in the air really.

I was just wondering whether I could squeeze by without pendulum ailerons - a nice simple build. . .sigh. . .

Thanks,
Stephen. P.S. They do not look sad and droopy - signed, Eeyore.
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billdennis747
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« Reply #1067 on: April 26, 2017, 12:12:43 PM »

I've used extensible struts many times with success but two degrees is all I've ever needed, and had no stability problems.
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billdennis747
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« Reply #1068 on: April 28, 2017, 03:47:42 PM »

We took the DH75 out to Luffenham and once I stopped trying to force it right, it went well on 30g of 1/8 in 16 strands 25" long (as recommended by my personal trainer)
https://www.youtube.com/watch?v=QHhcQPk9SO4

PS if you look carefully you can see the extensible struts working at launch
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ZK-AUD
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« Reply #1069 on: April 28, 2017, 04:02:58 PM »

Very nice Bill - great subject.  Who is the PT?
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billdennis747
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« Reply #1070 on: April 28, 2017, 04:13:08 PM »

PT?  Ah, just realised. Ivan Taylor. He suggested 30g and 25" long. I began with 29" long and 12 strands which was taking it a quarter of a mile at 5 feet altitude. Gradually worked it up to what he said in the first place!
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Prosper
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« Reply #1071 on: April 29, 2017, 02:50:32 AM »

Very nice Bill. Good luck in the Nationals!

Stephen.
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DavidJP
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« Reply #1072 on: April 29, 2017, 09:32:53 AM »

Nice work Bill and there is nothing so pleasing and worthy of admiration as a FF scale rubber powered model flying so steadily.  Must be very satisfying for you!  I suppose Ivan could know a thing or two about rubber?
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p40qmilj
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love that P40Q



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« Reply #1073 on: May 03, 2017, 10:51:10 AM »

 Grin my latest is a He 100 by D Srull at 23 inch span.  The canopy is tough since I don't have molds.  Flight is still wobbly so I am still shaking it down . Has a nasty habil of rolling to the left which i counter with weight on left wing. Now to refine


BTW the black tissue is Crap so I lay down a sheet of white with grain vertical and then the black glued to it with grain lengthwise.


JIM Grin
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OZPAF
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« Reply #1074 on: May 03, 2017, 07:22:15 PM »

Amazing output Jim. It almost seems like one a day.

Happy flying.
John
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