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DB Tiger Moth 58"

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andy paterson30/01/2017 14:56:41
54 forum posts

Hi all

I have a kit from Dbsportandscale of tiger moth 58" wing span, it's the old version with solid tail feathers, on the box 40 to 50 engine would a saito 62 four-stroke fly this ok or should I go for a larger engine

Thanks all

Denis Watkins30/01/2017 15:01:29
3806 forum posts
52 photos

Technical Data:
Scale -1:6
Span -147cm (58"
0.40- 0.60 4strokes. 0.30- 0.50 2 strokes, or electric.
Weight -2.5kg (5.5lb)
Channels- 4Engines -.30-.50 2 or 4stroke
Wing chord =9"
Wing area (active) =7sq/ft
Wing 'G' test =6+
C/G point,4" (100mm) from L/E top centre section.

Denis Watkins30/01/2017 15:02:51
3806 forum posts
52 photos

tigermothcowl (1).jpg

Percy Verance30/01/2017 15:42:37
avatar
8109 forum posts
155 photos

Andy

I built the DB Moth 40 - which is a basically similar airframe - over 25 years back, and I used an OS .48 four stroke. It was ample power. That actual model is in my heading pic. These models don't need excessive power to fly successfully, although having a little in reserve is a good idea with a relatively draggy biplane. The Saito .62 will be very suitable for the DB Tiger Moth. There is definately no need to consider a larger engine.

I have the newer lazer cut DB kit for the Tiger Moth, but I may go electric rather than an i.c. engine.

Edited By Percy Verance on 30/01/2017 15:43:29

andy paterson30/01/2017 15:51:22
54 forum posts

Hi Percy

Is the new kit any better than the old one

Andy

PS will stick with the 62 engine

Jon - Laser Engines30/01/2017 16:46:57
4770 forum posts
179 photos

Yup, the 62 will be more than man enough. use a 13x5 or 6, or 14x5 for good thrust without the top end speed.

Percy Verance30/01/2017 20:59:09
avatar
8109 forum posts
155 photos

Hi again Andy

Without doubt the newer lazer cut kits are in another league. Ok, the older die - cut kits were good enough to build from, but Eddie and latterly the new owner of DB Richard have upped and maintained the quality superbly. I believe Eddie also redesigned several of the models to make them a better build. Richard, the new man at DB is doing his bit too, by introducing some of the models previously only available as plan-packs. The general presentation and quality of DB kits stands comparison with any other kit(s) I've seen.

And I'd second Jon's suggestion of a 13x5 prop on a Saito .62

Edited By Percy Verance on 30/01/2017 21:01:23

Tom Sharp 230/01/2017 23:57:14
avatar
3459 forum posts
17 photos

I have a 'Maxford' Tiger Moth ARTF, 50 inch wingspan and it fly's great powered with an OS 30 FS. Does all the Tiggy manouvers, even in strong winds.

So I think a 62 FS is a bit over the top for a 58 inch model

Andrew Mawman31/01/2017 08:58:14
22 forum posts
2 photos

i have a old version and it has more than enough power with a OS 52 FS fittedimg_0262.jpg

Manish Chandrayan31/01/2017 09:35:58
587 forum posts
65 photos

62 will be a good choice for the older kit. Mine is awaiting some repairs and install of Saito 65 instead of the Magnum 52 that was powering it.

With 62 you may be able to do away with some nose weight that may have been required with a lighter and lesser displacement engine. Plus the additional power (in reserve is always welcome)

Martyn Johnston31/01/2017 11:19:46
avatar
811 forum posts
249 photos

I built the DB S&S Cirrus Moth (same size; 58" a while back.

Fantastic plane to build; loved it - (Link here if you're interested).

I put a new Saito 72 FS in it. Oversized I know, but you don't 'have' to fly on full throttle do you.

And it need no lead up front at all; balanced perfectly.

Geoff Sleath31/01/2017 12:33:43
avatar
3298 forum posts
251 photos

I'm sure the Saito will be more than adequate. I think it'll probably take off comfortably of not more than half throttle.

My heading picture is of the very kit you have, however mine is electric on 4S. I had it given to me part finished but the builder, whilst very neat, wasn't an experienced aeromodeller (this was his first build) so there were a few errors to correct. I replaced the solid tail feathers with built up to get the weight down at the back. Even so, I've had to add lead. I would recommend you do the same.

I have a new 58" Cirrus Moth kit which is next in the queue after I complete my Mew Gull. Unfortunately I'm in an aeromodelling hiatus right now (ie I've lost some interest) and come to an abrupt stop so it'll be a while for my Cirrus sees flight but it will.

Geoff

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