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Old Dec 31, 2004, 02:58 PM
Speed Demon
GregG's Avatar
Antioch,CA,USA
Joined Dec 1999
12,307 Posts
Fan Swept Areas for Electric Ducted Fans

These are a few EDF particulars that I've collected over the years. I've calculated this set of figures to help me along with the duct area calculations. It's easier to do it once and write it down.

I'd like to add any other fans to this sheet. If you have data collected please post here and I'll update the 1st post with your data as we go.

Please let me know if you find any discrepancies. Started 12/31/04. Last revision to this collection of data was done on 01/09/05.

Greg Gallegos
cobrajet.rchomepage.com

WeMoTec Mini fan 480
5 blades
4 stators
Fan Shroud ID 2.715" - 68.961mm
Motor tube OD 1.27" - 32.258mm
Max Area 5.79 sq. in.- 37.35476 cm^2
Motor tube area 1.27 sq. in. - 8.193532 cm^2
Fan Swept Area 4.52 sq. in. - 29.16123 cm^2
Tailcone diam. 100% 2.4" - 60.96mm
Tailcone diam. 95% 2.28" - 57.912mm
Tailcone diam. 90% 2.16" - 54.864mm

WeMoTec 609
6 blades
5 stators
Fan Shroud ID 2.953" - 75.0062mm
Motor tube OD 1.55" - 39.37mm
Max Area 6.84 sq. in. - 44.12894 cm^2
Motor tube area 1.89 sq. in. - 12.19352 cm^2
Fan Swept Area 4.95 sq. in. - 31.93542cm^2
Tailcone diam. 100% 2.51" - 63.754mm
Tailcone diam. 95% 2.38" - 60.452mm
Tailcone diam. 90% 2.26" - 57.404mm

WeMoTec Midi Fan
6 blades
5 stators
Fan Shroud ID 3.53" - 89.662mm
Motor tube OD 1.50" - 38.1mm
Max Area 9.79 sq. in. - 62.06439 cm^2
Motor tube area 1.77 sq. in. - 11.41933 cm^2
Fan Swept Area 8.02 sq. in. - 51.74183 cm^2
Tailcone diam. 100% 3.20" - 81.28mm
Tailcone diam. 95% 3.04" - 77.22mm
Tailcone diam. 90% 2.88" - 73.152mm

Kress Jets RK-709
Fan Shroud ID 3.0"
Motor tube OD 1.665"
Max Area 7.06 sq. in.
Motor tube area 2.17 sq. in.
Fan Swept Area 4.89 sq. in.
Tailcone diam. 100% 2.49"
Tailcone diam. 95% 2.43"
Tailcone diam. 90% 2.36"

Morely Fan
8 blades
4 stators
Fan Shroud ID 2.5"
Motor tube OD 1.4"
Max Area 4.91 sq. in.
Motor tube area 1.6 sq. in.
Fan Swept Area 3.31 sq. in.
Tailcone diam. 100% 2.05"
Tailcone diam. 95% 2.00"
Tailcone diam. 90% 1.94"

Graupner Fan data

Speed 400 motor housing.
Fan Shroud ID 2.28"
Motor tube OD 1.2"
Max Area 4.08 sq. in.
Motor tube area 1.13 sq. in.
Fan Swept Area 2.95 sq. in.
Tailcone diam. 100% 1.93"
Tailcone diam. 95% 1.88"
Tailcone diam. 90% 1.83"

GWS EDF64-300H Thanks CofG
Fan Shroud ID 2.50" 63.5mm
Motor tube ID 1.06" 27.0mm
Max Area 4.91 sq. in.
Motor tube area 0.88 sq. in.
Fan Swept Area 4.03 sq. in.
Tailcone diam. 100% 2.26"
Tailcone diam. 95% 2.15"
Tailcone diam. 90% 2.04"

Schuebler DS-30 Thanks Barry (monkamarm2000)
3 blades
3 stators
Fan Shroud ID 2.717" - 69.000mm
Fan Shroud OD 2.835 71.975mm
Motor tube OD 1.256" - 30.900mm
Max Area 5.79 sq. in.- 37.35476 cm^2
Motor tube area 1.23 sq. in. - 7.935 cm^2
Fan Swept Area 4.55 sq. in.- 29.412 cm^2
Tailcone diam. 100% 2.41" - 61.19mm
Tailcone diam. 95% 2.35" - 59.65mm
Tailcone diam. 90% 2.29" - 58.05mm

Schuebler DS-51 Thanks Klaus
3 blades
3 stators
Fan Shroud ID 3.54" - 89.916mm
Motor tube OD 1.575" - 40.005mm
Fan Swept Area 7.89 sq. in.- 50.929cm^2
Tailcone diam. 100% 2.73" - 80.53mm
Tailcone diam. 95% 2.66" - 78.49mm
Tailcone diam. 90% 2.59" - 76.39mm

WM600 Thanks Klaus
Fan Shroud ID 3.15" - 80.01mm
Motor tube OD 1.575" - 40.005mm
Fan Swept Area 5.79 sq. in.- 37.7086 cm^2
Tailcone diam. 100% 2.73" - 69.29mm
Tailcone diam. 95% 2.66" - 67.54mm
Tailcone diam. 90% 2.59" - 65.73mm

Vasa 55 Thanks Joe51
Fan Blades: 6
Fan Shroud ID 2.205" - 56mm
Motor tube OD 0.984" - 24.99mm
Fan Swept Area 3.058 sq. in.- 19.73 cm^2
Tailcone diam. 100% 1.97" - 50.12mm
Tailcone diam. 95% 1.92" - 48.85mm
Tailcone diam. 90% 1.87" - 47.55mm


Kyosho Fan Thanks JRB
Fan Shroud ID 2.95" - 75mm
Motor tube OD 1.26" - 32mm
Fan Swept Area 5.59 sq. in.- 36.05 cm^2
Tailcone diam. 100% 2.66" - 67.75mm
Tailcone diam. 95% 2.60" - 66.04mm
Tailcone diam. 90% 2.53" - 64.27mm

Edit:
01/07/05
I had a real fun time getting the formulas plugged into Excel so that everything would work on a custom spreadsheet just for us. I'm proud to say I think it finally came to fruition this evening so I'm going to post it. My Ducted Fan Areas Spreadsheet can be downloaded by clicking on the link and saving it to your hard disk.

You use it by simply filling in two numbers. A measurement of the inner fan shroud diameter in inches is entered into an open cell in column B. Follow that up with the measurement of the outer diameter of the motor tube entered in the space to the right of that in column C. Hit the "Enter" key and automatically the remaining spaces in that row will fill with information such as we've been talking about. It gives you the info in both inches and millimeters.

It's late and I'm getting a bit bleary eyed but it looks like I finally did it. Check it out and let me know if I made any mistakes. BTW, I have to hand it to my dear girlfriend for helping me get my formulas into a format that Excel could understand. Thanks Kathy!

I hope this will help some of you make EDF's fill the skys!
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Last edited by GregG; Jan 09, 2005 at 08:34 AM.
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Old Dec 31, 2004, 04:26 PM
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Kevin Cox's Avatar
St. Louis Intl, Missouri, United States
Joined Jan 1997
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Great idea Greg!
Thanks.
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Old Dec 31, 2004, 05:24 PM
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Ed Waldrep's Avatar
Las Vegas, NV
Joined Dec 1996
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Thank's Greg, nice to have it in one place. I guess we could send text to you so you could add it to the list by editing the message, or we could just post it here later.
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Old Dec 31, 2004, 05:33 PM
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Herb's Avatar
Irvine, Calif USA
Joined Feb 1999
12,168 Posts
If the HW-609 and Midi use the same motor mount, then their inner diameter and areas should be the same. I think you need to recalculate your numbers.
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Old Dec 31, 2004, 06:19 PM
2014 EDF JET JAM We be Jamming
Kevin Cox's Avatar
St. Louis Intl, Missouri, United States
Joined Jan 1997
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I think it depends on how new it is Herb.
The older EJT shroud actually had a smaller ID motor tube if you opted for the Speed 600 version and not the cobalt one.

However, I could be wrong....again
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Old Dec 31, 2004, 06:42 PM
Speed Demon
GregG's Avatar
Antioch,CA,USA
Joined Dec 1999
12,307 Posts
No problem Herb, Send me some measurements and I'll recalculate it. I started this table at least 8 years ago and it may need some "Fine Tuning". I just thought it would be a good idea to have it all in one place. Any info you can add here helps all of us.

Anyone have direct measurments on a DS-51 or DS-30?
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Old Dec 31, 2004, 09:01 PM
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Wareham, Dorset, UK
Joined Dec 2003
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Quote:
Originally Posted by GregG
No problem Herb, Send me some measurements and I'll recalculate it. I started this table at least 8 years ago and it may need some "Fine Tuning". I just thought it would be a good idea to have it all in one place. Any info you can add here helps all of us.
Anyone have direct measurments on a DS-51 or DS-30?
Hi Greg

It may be a good idea to put everything into an Excel spread sheet and have the metric conversions as well.

Have fun with fans

Klaus
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Old Dec 31, 2004, 11:15 PM
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TGoodwin's Avatar
Las Vegas, NV
Joined Dec 2000
2,558 Posts
Metric conversion

Greg Gallegos
cobrajet.rchomepage.com

WeMoTec Mini fan 480
5 blades
4 stators
Fan Shroud ID 2.715" - 68.961mm
Motor tube OD 1.27" - 32.258mm
Max Area 5.79 sq. in.- 37.35476 cm^2
Motor tube area 1.27 sq. in. - 8.193532 cm^2
Fan swept area 4.52 sq. in. - 29.16123 cm^2
Tailcone diam. 100% 2.4" - 60.96mm
Tailcone diam. 95% 2.28" - 57.912mm
Tailcone diam. 90% 2.16" - 54.864mm

WeMoTec 609
6 blades
5 stators
Fan Shroud ID 2.953" - 75.0062mm
Motor tube OD 1.55" - 39.37mm
Max Area 6.84 sq. in. - 44.12894 cm^2
Motor tube area 1.89 sq. in. - 12.19352 cm^2
Fan swept area 4.95 sq. in. - 31.93542cm^2
Tailcone diam. 100% 2.51" - 63.754mm
Tailcone diam. 95% 2.38" - 60.452mm
Tailcone diam. 90% 2.26" - 57.404mm

WeMoTec Midi Fan
6 blades
5 stators
Fan Shroud ID 3.53" - 89.662mm
Motor tube OD 1.50" - 38.1mm
Max Area 9.62 sq. in. - 62.06439 cm^2
Motor tube area 1.77 sq. in. - 11.41933 cm^2
Fan swept area 7.85 sq. in. - 50.64506 cm^2
Tailcone diam. 100% 3.16" - 80.264mm
Tailcone diam. 95% 3.00" - 76.2mm
Tailcone diam. 90% 2.84" - 72.136mm

Will maybe try and do the rest later. Thanks for posting Greg. Nice to have a quick referance to refer to.

Ted
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Old Jan 01, 2005, 12:26 AM
Speed Demon
GregG's Avatar
Antioch,CA,USA
Joined Dec 1999
12,307 Posts
Quote:
Originally Posted by winmodels
Hi Greg

It may be a good idea to put everything into an Excel spread sheet and have the metric conversions as well.

Have fun with fans

Klaus
I was thinking the same thing Klaus. We'll see what we come up with tommorrow.

Good idea on the Metric conversions Ted!

Thanks Guys.
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Old Jan 01, 2005, 11:09 AM
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NorCal Silicon Valley
Joined Aug 2002
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I'll try to measure up my DS-30's tonight. They do have a larger over all diameter than min fan and I suspect there are rotor diameter differences to go along with it.
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Old Jan 02, 2005, 03:40 PM
Registered User
Bendigo, Victoria, Australia
Joined Sep 2002
557 Posts
Hi fellars, just wondering if someone could help, I'm designing my first scratch built jet, I'm basing it around 2 x minifans, B4012s 4s liPos etc.

My problem is trying to maintain as close as possible scale size nacelles and intakes, without making the all up size of the model too big.

My question is, could I design the intake diameter to just over the Fan swept area 4.52 sq. in. - 29.16123 cm^2 and taper the intake tube to the fan to match the fan shroud ID 2.715" - 68.961mm?

Thanks
Joe
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Old Jan 02, 2005, 05:09 PM
Speed Demon
GregG's Avatar
Antioch,CA,USA
Joined Dec 1999
12,307 Posts
Short answer to your question is yes. Take care to make a rounded inlet with as large a diameter radiused lip as possible and a smooth transition from the inlet diameter to the fan inlet.

Chris Golds did exactly a few years ago that on his B-52 with 8 EDF units. His documentation and his duct testing are in older Electric Flight Magazines.
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Old Jan 02, 2005, 05:30 PM
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Bendigo, Victoria, Australia
Joined Sep 2002
557 Posts
Thanks Greg, thats good news, I can now start bringing the overall model size down a bit.
And thanks, if you'd hadn't posted the thread for Fan Swept Areas for Electric Ducted Fans I never would have thought of it and would still be um and arring on overall sizes
Thanks
Joe
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Old Jan 02, 2005, 08:27 PM
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Joined Sep 2004
451 Posts
Does anyone know the fan swept areas of the QWS EDF64-300H?? Here is a pix of the specs.

Thanks
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Old Jan 03, 2005, 01:40 AM
Speed Demon
GregG's Avatar
Antioch,CA,USA
Joined Dec 1999
12,307 Posts
What is the diameter of the motor tube? We'll need that to input any figures.
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