Search: Posts Made By: Yak 52
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Forum: Aerodynamics
12-26-2011, 11:53 PM
Replies: 63
Views: 17,594
Posted By Yak 52

While the principles of 'the downwind turn' have...

While the principles of 'the downwind turn' have been thoroughly stated by JPF I think it's noting that in reality Wind Shear/Gradient can have a very noticeable effect on models that are climbing or...
01-27-2011, 11:13 PM
Replies: 10
Views: 8,774
Posted By Yak 52

They are now! Steve, since your post the...

They are now!

Steve, since your post the FAC have changed the rules for 2011. The updated rules are on the FAC website.

Jon
Forum: Aerodynamics
10-12-2010, 11:43 PM
Replies: 19
Views: 7,898
Posted By Yak 52

What Steve said is correct: Fly at best L/D...

What Steve said is correct:

Fly at best L/D speed for maximum range - but only in still air...

If there is a head wind then the best range speed would be faster than best L/D speed and if...
Forum: Aerodynamics
10-07-2010, 07:08 PM
Replies: 19
Views: 7,898
Posted By Yak 52

And drag. A plane with no drag would only need...

And drag. A plane with no drag would only need one little tiny push! :cool:

You do need to specify what kind of efficiency your after though.

Do you want best total range ie. glide ratio or...
Forum: Beginners
09-23-2010, 11:58 PM
Replies: 6
Views: 3,407
Posted By Yak 52

The extra blade means the more thrust, hence...

The extra blade means the more thrust, hence lower revs. I think you'll be fine out runnin the Spits...

:D
Forum: Beginners
09-23-2010, 11:18 PM
Replies: 6
Views: 3,407
Posted By Yak 52

Thanks guys. I had my free 30 days of...

Thanks guys.

I had my free 30 days of motocalc back when i was playing with sp400 and 6 nicads. :sad:

I understand the thrust effects/benefits, but I read somewhere that you could end up with...
Forum: Beginners
09-23-2010, 06:13 PM
Replies: 6
Views: 3,407
Posted By Yak 52

Low Motor Kv - advantages?

What are the advantages of a low Kv motor?

I'm assuming the low revs means you can swing a bigger prop and get a better low speed/low pitch set up?

Is that right? :confused:

Ta!
Forum: Beginners
09-07-2010, 09:59 PM
Replies: 165
Views: 41,784
Posted By Yak 52

I build. In balsa. And design. ...

I build.

In balsa.

And design.

On my drawing board with pencils.*

I have yet to buy an ARTF.
11-21-2009, 08:08 PM
Replies: 1
Views: 1,398
Posted By Yak 52

Arrow Active II Biplane - 3 Views anyone?

Looking for a 3 view drawing of the 1931 Arrow Active II - I have a drawing of the original Mark I from Flight Global online time but can't find a drawing of the Mark II version anywhere....
...
Forum: WWI Era
11-21-2009, 08:00 PM
Replies: 46
Views: 9,864
Posted By Yak 52

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

So did anyone ever build a DH5 then?

????
Replies: 2
Views: 3,609
Posted By Yak 52

Can I put 27mHz crystals in 35mHz Tx and Rx?

I have a 12 year old 35MHz Sanwa Conquest II Tx and Rx and I would like to use it for a boat model.

Is it possible to get 27MHz or 40 MHz crystals to work with this set up?

Or do I need to...
Forum: Aerodynamics
02-18-2009, 10:29 PM
Replies: 3
Views: 1,778
Posted By Yak 52

info Link to List of Aerofoil Usage in Ful Size Aircraft

May be of use to Scale modellers...

http://www.public.iastate.edu/~akmitra/aero361/design_web/airfoil_usage.htm
02-05-2009, 04:00 PM
Replies: 7
Views: 1,277
Posted By Yak 52

Re: "what type of plane do you have?" I'm...

Re: "what type of plane do you have?"

I'm just after an uber cheap set up for a scratch build - I'm aware of the power/weight advantages of lipo but this one won't be a problem with NiMH as...
02-03-2009, 07:02 PM
Replies: 7
Views: 1,277
Posted By Yak 52

NiMh Battery choice?

I'm looking for some cheap NiMH 8-cell/9.6V packs for a speed 400 and 15 or 20A esc.

Longer duration would be good so 1000-2000mAh?

Any reccommendations?

Was looking here:...
Forum: Aerodynamics
01-30-2009, 11:43 PM
Replies: 22
Views: 5,106
Posted By Yak 52

Hi Huffy01 Nice project! Two things: ...

Hi Huffy01

Nice project!

Two things:
You will lose some of the benefits of having slipstream over the control surfaces, i.e. more difficult to control on the ground - maybe poorer control...
Forum: WWI Era
01-29-2009, 11:02 PM
Replies: 46
Views: 9,864
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, 11:32 PM
Replies: 46
Views: 9,864
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, 09:17 PM
Replies: 46
Views: 9,864
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, 11:31 AM
Replies: 46
Views: 9,864
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, 12:13 PM
Replies: 46
Views: 9,864
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, 12:00 PM
Replies: 46
Views: 9,864
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
01-24-2009, 12:03 AM
Replies: 1
Views: 1,311
Posted By Yak 52

Try a Scale One of These!

Anyone game for a try?

http://www.pilotfriend.com/photo_albums/potty/7.htm

:D
Forum: WWI Era
01-23-2009, 11:47 PM
Replies: 46
Views: 9,864
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: Aerodynamics
01-23-2009, 11:34 PM
Replies: 53
Views: 8,496
Posted By Yak 52

Agreed! It's not a direct comparison really...

Agreed!

It's not a direct comparison really then (unless the EP plane has equivalent load/throttle setting ... )
01-23-2009, 07:06 PM
Replies: 31
Views: 5,736
Posted By Yak 52

hehehe I don't wish i was 10" tall all the...

hehehe

I don't wish i was 10" tall all the time! :rolleyes:
01-23-2009, 07:00 PM
Replies: 30
Views: 24,159
Posted By Yak 52

Thanks... What about if you wanted to write...

Thanks...

What about if you wanted to write an article? Do they have to be submitted and checked etc...? Or is it best to do a long post instead?
Forum: WWI Era
01-23-2009, 06:56 PM
Replies: 46
Views: 9,864
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, 06:54 PM
Replies: 46
Views: 9,864
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 /...
01-23-2009, 11:37 AM
Replies: 31
Views: 5,736
Posted By Yak 52

That's amazing! I wish I was 10 inches tall! hehe

That's amazing! I wish I was 10 inches tall! hehe
01-23-2009, 11:04 AM
Replies: 30
Views: 24,159
Posted By Yak 52

Thanks Any tips on how to start a builders...

Thanks

Any tips on how to start a builders thread?

And what makes a good sticky?
Who decides that a thread should be a sticky?
Showing results 1 to 30 of 65
 


 
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