Author Topic: WHIF's found in Magazines/books  (Read 33696 times)

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Offline joncarrfarrelly

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Re: WHIF's found in Magazines/books
« Reply #210 on: February 23, 2019, 03:12:22 pm »
I need to keep an eye out for suitable sized fans as scratchbilding them is very time consuming.  Computer cooling fans maybe?

If you do find something suitable and Cheap!, can you please let the rest of us know?
I for one have a couple of ideas but I'm put off by the thought of scratchbuilding Two! engines with Contra-rotating! fans...  :banghead: :
Oh, and did I mention they are to be Shrouded?!  :banghead: :anghead:

Yes. Cheap is the operative word here.  I'm sure I could find computer fans that looked perfect but then would have to junk the motors and casings which would be wasteful and expensive.

https://www.ebay.com.au/itm/Mini-3-Pin-40mm-PC-Computer-CPU-Cooler-Cooling-Fan-40x40x10mm-DC-12V-9-Blades-/221339558322

4 or more for AU $3.22/ea

 ;)
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Offline Flyer

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Re: WHIF's found in Magazines/books
« Reply #211 on: February 23, 2019, 03:24:47 pm »
I need to keep an eye out for suitable sized fans as scratchbilding them is very time consuming.  Computer cooling fans maybe?

If you do find something suitable and Cheap!, can you please let the rest of us know?
I for one have a couple of ideas but I'm put off by the thought of scratchbuilding Two! engines with Contra-rotating! fans...  :banghead: :
Oh, and did I mention they are to be Shrouded?!  :banghead: :anghead:
Yes. Cheap is the operative word here.  I'm sure I could find computer fans that looked perfect but then would have to junk the motors and casings which would be wasteful and expensive.


How about something like this? (these are 1.25 inch diameter btw and are only an example, there are many other styles like 5 or 6 blades etc and sizes available with a bit of searching)

https://hobbyking.com/en_us/inductrix-compatible-props-grey-color.html
Everything is theoretically impossible, until it is done. -Robert A. Heinlein

Offline Rick Lowe

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Re: WHIF's found in Magazines/books
« Reply #212 on: February 23, 2019, 05:14:22 pm »
Oh, cool! Thanks, Flyer - I'll have a peruse!  :thumbsup: :thumbsup:

Later:

YESS!! Those will work, and there's enough material in a lot of them to reshape the blades and cut the diameter down to something more manageable.  :thumbsup: :thumbsup:

Thanks for that, Flyer - have a Pat on the Back - or even two, I'm in a generous mood (takem while you can gettem, it don't happen that often with me...  ;D ;) )
« Last Edit: February 23, 2019, 06:07:09 pm by Rick Lowe »

Offline zenrat

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Re: WHIF's found in Magazines/books
« Reply #213 on: February 25, 2019, 03:17:16 am »
Thanks Brad F.  That website looks to be a great resource.
 :thumbsup:
Fred

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Offline Scotaidh

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Re: WHIF's found in Magazines/books
« Reply #214 on: February 25, 2019, 01:24:13 pm »
Oh, cool! Thanks, Flyer - I'll have a peruse!  :thumbsup: :thumbsup:

Later:

YESS!! Those will work, and there's enough material in a lot of them to reshape the blades and cut the diameter down to something more manageable.  :thumbsup: :thumbsup:

Thanks for that, Flyer - have a Pat on the Back - or even two, I'm in a generous mood (takem while you can gettem, it don't happen that often with me...  ;D ;) )

And - there's these:



 $6.35 ea

EDF Ducted Fan Unit 6Blade 2.75inch 70mm
 
Blade Diameter: 68.3mm / 2.68inch
Outer Case Diameter: 73mm
Wall Thickness: 1.53mm
EDF Length: 59mm
Front Shroud Diameter: 83mm
Motor Mount Holes: (from 18mm & 22mm)
Blade Type: 6
Shaft Size: 4mm
This EDF will take a motor with a maximum diameter of 28mm.(see related items)

Made from high strength reinforced plastic.
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Offline Flyer

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Re: WHIF's found in Magazines/books
« Reply #215 on: February 25, 2019, 02:41:39 pm »
 :thumbsup:

There are other empty EDF's like those in there too in 30mm, 40mm and 50mm  :mellow:

(I need a replacement 70mm fan for my R/C jet model, it may not sound very large by the spec's but they are quite bulky in the hand, a 50mm EDF would be better suiting the size of a 1/72 model in my opinion, just food for thought...)
Everything is theoretically impossible, until it is done. -Robert A. Heinlein

Offline chrisonord

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Re: WHIF's found in Magazines/books
« Reply #216 on: February 25, 2019, 02:58:13 pm »
Those ducted fans look very useful, I think I will look in to some of those
Chris
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Offline Rick Lowe

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Re: WHIF's found in Magazines/books
« Reply #217 on: February 25, 2019, 11:38:05 pm »
That's even better, is it from the same site?

Never mind, I see it is... should have looked better!

Thanks, I might have to revisit and spend more money...  ;D
« Last Edit: February 26, 2019, 12:02:51 am by Rick Lowe »

Offline zenrat

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Re: WHIF's found in Magazines/books
« Reply #218 on: February 25, 2019, 11:51:57 pm »
They are almost perfect for what I have in mind.
Fred

Another ill conceived, lazily thought out, crudely executed and badly painted piece of half arsed what-if modelling muppetry from zenrat industries.

"...the dreamers of the day are dangerous men, for they may act their dreams with open eyes, to make it possible.