Search: Posts Made By: Yak 52
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Forum: WWI Era
11-21-2009, 07:00 PM
Replies: 46
Views: 10,176
Posted By Yak 52

So did anyone ever build a DH5 then? ????

So did anyone ever build a DH5 then?

????
Forum: WWI Era
01-29-2009, 10:02 PM
Replies: 46
Views: 10,176
Posted By Yak 52

Absolutely! Do it, do it! The maths is a start...

Absolutely! Do it, do it!
The maths is a start and a useful check at times but don't let it get to you!

It can bug you if it keeps coming out wrong though...

Just a thought... when you did:...
Forum: WWI Era
01-28-2009, 10:32 PM
Replies: 46
Views: 10,176
Posted By Yak 52

Some very good advice chaps... So... If you...

Some very good advice chaps...

So... If you want to fly 'scale':
Add lightness!
(and fly on calm days!)

The only problem with building too light will be if you end up with a structure that...
Forum: WWI Era
01-26-2009, 08:17 PM
Replies: 46
Views: 10,176
Posted By Yak 52

Agreed - Scale weight won't produce scale looking...

Agreed - Scale weight won't produce scale looking speed.
What appears to the eyes to be scale speed will the same number of fuselage lengths per sec as the full size.
Here's why:...
Forum: WWI Era
01-26-2009, 10:31 AM
Replies: 46
Views: 10,176
Posted By Yak 52

This post’s a long one hope you can bear with me!...

This post’s a long one hope you can bear with me!

This is what I came up with:

Full Size Aircraft................... Model

Scale 1/8.5556

Span - 25’ 8” or ..308” ............36.00”...
Forum: WWI Era
01-24-2009, 11:13 AM
Replies: 46
Views: 10,176
Posted By Yak 52

Could you post the original specs? My 'puter...

Could you post the original specs?
My 'puter doesnt seem to like that scribd page...
Cheers
Jon
Forum: WWI Era
01-24-2009, 11:00 AM
Replies: 46
Views: 10,176
Posted By Yak 52

minutes are fractions of a degree ...

minutes are fractions of a degree

http://id.mind.net/~zona/mmts/trigonometryRealms/degMinSec/degMinSec.htm

I'll have a look at your specs and get back to you...

Jon
Forum: WWI Era
01-23-2009, 10:47 PM
Replies: 46
Views: 10,176
Posted By Yak 52

More interesting bipe stuff - particularly if you...

More interesting bipe stuff - particularly if you do go the own design route:

www.modelbouwforum.nl/forums/algemeen-modelvliegen/46394-vleugel-oppervlakte.html...
Forum: WWI Era
01-23-2009, 05:56 PM
Replies: 46
Views: 10,176
Posted By Yak 52

Re: "(the full-scale specs consider the control...

Re:
"(the full-scale specs consider the control surfaces seperate from the rest of whatever they are attached to, i.e, aileron area and wing area are separate), "

Have you worked that out from...
Forum: WWI Era
01-23-2009, 05:54 PM
Replies: 46
Views: 10,176
Posted By Yak 52

Full size span / intended span = scale 308" /...

Full size span / intended span = scale
308" / 36" = 8.5555555555
or 1/8.55... scale

Or...
If I want to work to a particular scale and if model span is not too important:

Original span /...
Forum: WWI Era
01-23-2009, 09:10 AM
Replies: 46
Views: 10,176
Posted By Yak 52

So you are looking at 1/8 or 1/9th then? 34.2 or...

So you are looking at 1/8 or 1/9th then? 34.2 or 38.5" respectively...

Re: 'high drag characteristic of biplanes'

Yup, that's what I meant...
Forum: WWI Era
01-23-2009, 12:05 AM
Replies: 46
Views: 10,176
Posted By Yak 52

I make that about 1.85ft2 for area, so at 18.7oz...

I make that about 1.85ft2 for area, so at 18.7oz that's 10oz/ft2 wingloading, as near as dammit!

However... (there's always a however)

A biplane's wing area is less effective than the...
Forum: WWI Era
01-22-2009, 11:49 PM
Replies: 46
Views: 10,176
Posted By Yak 52

We aim to please...!

We aim to please...!
Forum: WWI Era
01-22-2009, 11:00 PM
Replies: 46
Views: 10,176
Posted By Yak 52

Quote: "In terms of scale some things (lengths,...

Quote:
"In terms of scale some things (lengths, spans) will be a direct percentage, but scale wing area will be square root of original. Scale weight would actually be cube root of original. Not...
Forum: WWI Era
01-22-2009, 09:51 PM
Replies: 46
Views: 10,176
Posted By Yak 52

no problem... Stick with 4 degrees. You...

no problem...
Stick with 4 degrees.

You might want to increase the tail plane and fin areas slightly with a model of that size and type - depends how 'scale' you want to go.

In terms of scale...
Forum: WWI Era
01-22-2009, 09:19 PM
Replies: 46
Views: 10,176
Posted By Yak 52

This site seems to do a laser kit for a large rc...

This site seems to do a laser kit for a large rc dH5 in their misc section
http://www.lazer-works.com/
Forum: WWI Era
01-22-2009, 08:55 PM
Replies: 46
Views: 10,176
Posted By Yak 52

Try this too ...

Try this too
http://www.scribd.com/doc/4665305/Aircraft-Profile-181-de-Havilland-DH5

You'll probably have to scratch build...
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