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Author Topic: Show Your Newest Creation  (Read 95752 times)
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Prosper
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« Reply #950 on: September 22, 2016, 03:15:48 PM »

I managed to sneak in another Martin Baker MB5 flight just now - not so good as the last flight I uploaded and disappointing since there were lots more turns - 1260 turns which is only a couple of hundred short of max - and the flight duration is no greater. But do I have excuses? Of course! The evening chill was descending very rapidly and the tissue was already wrinkled by the time the old crate landed. I think the air was probably sinking a bit, also that the model could have benefitted from a slight soup├žon of up-elevator (it was flying faster than expected). Never mind, it was good to see the ailerons at work. There is a very slight hesitancy of the ailerons at small deflections, which I can't correct until I open the wings up, and this can cause control problems, but they did their job this time. The picture shows how the model stopped: the contra-prop assembly has flipped out of the nose alleviating stress on the blades; it has tugged the torque-tube out a little bit - often the whole thing jumps right out - and the lead-tipped spinner cap is left behind the model despite being attached by a pair of neo dymy-minny-inyium magnets. The spinner cap helps to protect the blades too.

Stephen.
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Sky9pilot
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« Reply #951 on: September 23, 2016, 01:11:21 PM »

Thanks Stephen....beautiful model and your ailerons setup is great!
Sky9pilot
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Dr Spark
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« Reply #952 on: October 15, 2016, 09:21:28 PM »

I put this picture into another thread, not knowing where it belongs.  A 1/2-A version of the old timer Berkley Buccaneer free flight.  Built from plans obtained from NFFS.  Power is an old Atom .099 spark engine. 

I might have to wait until spring time for flying weather.

Floyd Carter
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Dr Spark
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« Reply #953 on: October 15, 2016, 09:31:28 PM »

Another recent effort.  This is the 1939 Korda Wakefield, but powered with a small electric motor.  First flight, even with a DT, I had to scramble over rough terrain to retrieve.  So, back to the workbench to install a 2.4GHz radio for rudder, elevator and motor.  Now, I can fly it anywhere and there is no chasing!
I like FF, but I do  not like chasing!

Floyd
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OZPAF
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« Reply #954 on: October 16, 2016, 06:33:11 PM »

Very nice models DS. The Korda looks elegant and I'm sure it will fly well with RC. Look up Flyguy's efforts here on HPA. He specializes in RC rubber FF.

Happy flying
John
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p40qmilj
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« Reply #955 on: October 16, 2016, 08:33:31 PM »

 Grin  working on the GAR Mustang, Pesco Special AND A PROFILE MUSTANG

JIM
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billdennis747
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« Reply #956 on: October 23, 2016, 09:40:44 AM »

A Halberstadt DII. 30", 9oz, Banks Mills 0.5cc, 4.5oz/sq ft, enlarged tail!
It will get an engine, exhaust and pilot when it flies.
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DavidJP
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« Reply #957 on: October 23, 2016, 01:13:07 PM »

Yes, I like. But how do you expect it to fly sans engine and pilot. (Sorry).

This aircraft has always fascinated me with its rather pinched look but more so with the trailing edge droop and upper wing washout that some were so rigged. Washout OK but the "droop"?  What dihedral did you decide upon Bill? And how much of an increase in tail area.  It does not look that overdone.
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billdennis747
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« Reply #958 on: October 23, 2016, 02:01:23 PM »

Tail area is about double - probably overkill. Dihedral is about scale and the lower wings have washed out all by themselves!
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« Reply #959 on: October 23, 2016, 06:08:25 PM »

Help Help - pilot less plane Smiley Very nice Bill - nice sheen on the paint without being glossy.
John
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billdennis747
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« Reply #960 on: October 24, 2016, 03:59:55 PM »

A DH75 Hawk Moth for rubber. 46" span and 9oz so far. I had wanted to finish it before posting but as you can see, the cold damp weather does not suit spraying cellulose so it may have to go away until spring.
However, I was hoping someone could suggest a prop size. I anticipate about 40g rubber so is 18" about right? And 24" pitch? I shall use Ivan Taylor's strimmer cable blade attachment method
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« Reply #961 on: October 24, 2016, 05:04:37 PM »

Looks great.
I use low blush thinners from Flitehook ... not sure if it helps, but wondered if you have tried it?
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billdennis747
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« Reply #962 on: October 24, 2016, 05:18:14 PM »

Russ, yes anti-bloom thinners but to no avail. It was a very cold damp day.
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Hepcat
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« Reply #963 on: October 24, 2016, 06:35:30 PM »

response to #960,
Bill,
Your figures are uncannily close to what my old spreadsheet tells me.  I reckon that if you put your 40g into 14 strands that the 18" diameter prop with 1.25 P/D (pitch 22.5) should be about right.  It should comfortably take 1000 to 1200 turns and give a motor run of about a minute and a quarter to a minute and a half.  She looks neat in the tiny picture and I look forward to seeing her with more pixels at her 'Coming Out'.
John
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billdennis747
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« Reply #964 on: October 25, 2016, 03:15:35 AM »

Thanks John - the last thing it needs in its current state is more pixels!
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p40qmilj
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« Reply #965 on: October 25, 2016, 09:17:57 AM »

 Grin  here's three tangs  a GAR, a profile and a sheet conversion of stick and tissue by dave stott
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Sky9pilot
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« Reply #966 on: October 25, 2016, 06:30:55 PM »

Love your collection of Stangs!  How thin is the sheeted airframe sheets?
Tom
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rgroener
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« Reply #967 on: October 26, 2016, 12:42:18 AM »

You already had a chance to fly the birds of this nice fleet?
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p40qmilj
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« Reply #968 on: October 26, 2016, 06:41:38 AM »

 Grin yes, the birds are in flight testing and are beginning to behave.  the profile stang is working pretty good the others are coming.  the sheet stang has 1/32 sheet, light to med grade, in it; the tail feathers are 1/29 foam plates and the wing is built up. i don't do sheet work often because balsa ain't cheap or easily available.  i built it to prove a point to myself.

JIM Roll Eyes Grin
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billdennis747
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« Reply #969 on: December 01, 2016, 03:16:24 PM »

A John Barker Gigi after 3 days. PAW 55
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Hepcat
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« Reply #970 on: December 05, 2016, 07:09:07 PM »

Bill,
Thank you for shewing pictures of 'Gigi'. After all these years I hardly recognized her.  Did you really build her in three days?  It would be good if that was the case because I seem to remember claiming that she was the quickest and safest way of getting a small diesel into the air.  I am puzzled by the 38" span.  It is not the sort of thing I would do when balsa came in 36" lengths..  Was yours built from the 'Aeromodeller' plan?  If it was I can't help wondering if someone else put two extra bays in the wing.  I know the way my mind works.  I would normally have used five 2" rib spacings in the outer panels, three 2" spacings on the inner panel and one narrower spacing to suit the fuselage width.  The fact there are two narrow spacings  at the centre is an odd thing to do and causes the extra 2" on span.  If it was my mistake I am very sorry.
John   
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billdennis747
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« Reply #971 on: December 06, 2016, 03:04:29 AM »

Hello John, yes, three days.
The original plan is advertised at 38 1/2" I recall but I just measured the wing (because it didn't fit in my box, like my 39" Baron Knight does) and laid flat it is 42"!
I had to add some lead at the front, as predicted
Bill
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« Reply #972 on: December 06, 2016, 06:38:43 AM »

I've just had a look at the plan and the the "List of Materials" does tie in with the plan as drawn; ie 3 lengths for the spars, 2 for the LE etc. whereas you would only need 2 spars, 1 LE etc if it was only going to be 36" span. A nice looking plane - a powered Lulu?
Ron
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billdennis747
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« Reply #973 on: December 06, 2016, 06:52:59 AM »

It's a great design - a proper beginner's model. The nose is too short unless you use very light wood for the tail but the main problem is the sheet sides. Does anyone else find that modern sheet balsa distorts as soon as you cut it? The only way to deal with it is to cut 1/4" oversize, let it settle, then cut it down gradually until you have two identical, straight sides. Yes, a powered Lulu
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billdennis747
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« Reply #974 on: December 06, 2016, 02:03:24 PM »

A Hepcat
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