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Author Topic: Bostonian Bede BD5  (Read 9726 times)
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Sky9pilot
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« Reply #50 on: April 17, 2012, 01:20:22 PM »

Good looking bones...can't wait to see this baby finished...

Tom
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atesus
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« Reply #51 on: April 17, 2012, 02:06:32 PM »

Very pleasant lines Cool. Looks like you'll be right around 14g too.
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OZPAF
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« Reply #52 on: April 17, 2012, 09:22:17 PM »

Very nice Jon and it has captured the Bede BD5 charm.
John
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Yak 52
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« Reply #53 on: April 21, 2012, 08:08:46 AM »

Thanks guys.

I started covering earlier this week: I did the nose block first (covered wet) and then did the sides - completely forgetting my plan to do the 'fillets' at the back first  Undecided So I took all the sides off again and did the fillets. As it's a conical curve, they are a single thickness of tissue. They'd be better with a bit of paper like a wing fillet, but it's the wrong place to be adding weight.

I've been experimenting with floral spray to improve the colour of the tissue trim. I'm having some problems with the paint bleeding through however. But it's still a lot better than straight tissue which just disappears on the dark blue. In the pic below they all look better than they are because of the white paper they are laid on.


Jon
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Yak 52
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« Reply #54 on: April 21, 2012, 10:02:16 AM »

Fillets are done! I'm pleased at how easy they were with just tissue. The trick was getting the grain and tension lengthwise down the cone of the curve (as shown on the pic.) While I was building the half former had been sanded to conform to this cone with sandpaper wrapped around a pen of the right radius.
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Yak 52
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« Reply #55 on: April 21, 2012, 10:03:47 AM »

I was asked elsewhere about the clearance for the motor at the back. What might not be obvious is that the fuselage is entirely open until you get to the tail's leading edge and the small half former. The pics show a blast tube placed inside.

The motor is slightly angled relative to the propshaft but I'm hoping this will be ok with a long, low-powered indoor motor?
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lincoln
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« Reply #56 on: April 21, 2012, 09:38:44 PM »

I don't think the angle should be a problem. I've seen a design for a twin that had both motors angle from the back of the prop assembly to the centerline of the fuselage! (Astral kit for Briston Blenheim, in the Plan Gallery)

People I know use chalk pastel on the back of their tissue when they want it to look more opaque or to change its color.

Also, I wonder what it looks like if you spray a very light coat of silver on the back of the trim pieces before applying?
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DaddyO
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« Reply #57 on: April 22, 2012, 03:12:37 AM »

Hiya Yak52 . . . .lovin' it so far  Cheesy

I always give the back of the printed tissue a light spray of white acrylic from a rattle can if it's going onto a dark surface (Stick it on with a UHU gluestick) which doesn't add a lot of weight and make's one heck of a difference.

Cheers
Paul
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« Reply #58 on: April 22, 2012, 05:17:53 AM »

Thanks chaps. The floral spray works well but the bleed problem is more because of the tissue - the red is peck and the orange domestic. I chose them for the vibrant colour (better than esaki) but the weave is quite open. I'm getting there with the spray though. Building up thin coats one at a time seems to be working ok. I've never had much success with chalking tissue but I'll do another test strip and see how it goes...
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Hepcat
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« Reply #59 on: April 22, 2012, 06:41:49 AM »

I admire your workmanship and I have added a kudos for the fillets - you must be proud of those.

John
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« Reply #60 on: April 22, 2012, 11:40:50 AM »

Thank you John  Smiley
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Yak 52
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« Reply #61 on: April 23, 2012, 08:09:24 AM »

Covering the fuselage continues.

The correct sequence seems to be nose block (covered wet) and 'fillets' first. Then the sides, then the top and bottom. The side pieces can be cut out over the plan to make trimming easier around the rear end.
Attached files Thumbnail(s):
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Yak 52
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« Reply #62 on: April 23, 2012, 08:10:40 AM »

The fuse is now 4.3g, so covering has added less than a gram.
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Sky9pilot
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« Reply #63 on: April 23, 2012, 10:04:01 AM »

Jon,

Inspiring job of covering....very nicely done...

Great model

Tom
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« Reply #64 on: April 24, 2012, 10:58:51 PM »

I was sure you would have had problems with the rear fillets Jon. I'm glad I was totally wrong. Outstanding work on this model.
John
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« Reply #65 on: May 05, 2012, 08:00:35 AM »

Covering is now complete - I had to wait quite a while because of the hideous weather we've been having  Shocked

I used dope on the fuselage but banana oil on the wings and tail surfaces. The banana oil works really well and has a nice finish. It does seem to shrink much either.

Weight is now up to 10.5 grams - canopy, prop and colour trims to add. It will also need some noseweight (the CG is just forward of the main gear now but most of the extra weight will go aft of this point) so I expect to go over the 14g air frame target.

The nose block was accidentally covered in a different batch of esaki - I had to order some more for the wings and tail. I ought to re-do the nose but it's too much trouble  Undecided Lesson learned though...
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danmellor
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« Reply #66 on: May 05, 2012, 10:54:51 AM »

Lovely! Got to have a go at this one when you post the plan...

Dan.
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« Reply #67 on: May 06, 2012, 11:58:06 AM »

Thanks Dan, (and Tom and John from posts #63 and #64)

I have a few tweaks to make to the plan and then I'll scan it. I'd be chuffed to bits if anyone has a pop at it  Cool


Jon
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« Reply #68 on: May 06, 2012, 12:47:49 PM »

Like I said, I gotta build this one! Thinking about it, I have three pushers sat around in their boxes.. Seems to be a weakness of mine! Along with violent thrash metal and senseless alcohol abuse....

Dan.
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« Reply #69 on: May 07, 2012, 06:43:07 AM »

Jon, your BD5 is coming out great! I hope you have already ordered good weather and a nice soft field for test flights. It's not far anymore.
Good luck and dont forget to take pictures or even a video Cheesy

Best regards Roman
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« Reply #70 on: May 14, 2012, 07:08:15 PM »

Thanks Roman, glides over the bed seem good so far. Glide ratio is better than expected (missed the bed!  Shocked) but no damage fortunately...
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« Reply #71 on: July 05, 2012, 09:56:35 PM »

Thanks Dan, (and Tom and John from posts #63 and #64)

I have a few tweaks to make to the plan and then I'll scan it. I'd be chuffed to bits if anyone has a pop at it  Cool


Jon
Have you scanned it yet? I'd love to have the plan. It really looks like it would be a lot of fun to try to build it.

Have you flown it ? How did it go?
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« Reply #72 on: July 06, 2012, 06:13:22 AM »

Hi Snow Owl,

I have struggled to scan the plan with my A4 scanner, it keeps distorting slightly  Undecided so I will have to go to a copy shop or something and do it fullsize. The model isn't quite finished yet (I lost impetus when the SFA cook up finished) but it's on my to do list  Smiley Test glides are quite encouraging, with a flat glide for a bostonian (low drag hopefully). It just needs a prop, the canopy and a few trim stripes...

Jon
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« Reply #73 on: September 13, 2012, 12:55:26 PM »

Hi Snow Owl,

I have struggled to scan the plan with my A4 scanner, it keeps distorting slightly  Undecided so I will have to go to a copy shop or something and do it fullsize. The model isn't quite finished yet (I lost impetus when the SFA cook up finished) but it's on my to do list  Smiley Test glides are quite encouraging, with a flat glide for a bostonian (low drag hopefully). It just needs a prop, the canopy and a few trim stripes...

Jon

What's the latest on your BD -5? Have you flown it? Did you ever manage to scan the plans? If you only have a full-size paper copy, could I give you some money for a copy?
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Yak 52
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« Reply #74 on: September 14, 2012, 04:40:08 PM »

Hi Snow Owl, thanks again for the interest, not done much with it yet but the incentive is there as we have now got some indoor dates to spur me on... I go the bits out and have bumped it up my build list. I still hope to annotate and scan the plan, but I will have to make a couple of tweaks first.

Cheers
Jon
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