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New EDF Mini Jets- Sabre & MiG15 RCM&E 2018 Special

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Nigel R26/09/2018 10:35:49
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3403 forum posts
524 photos

trebor, don't know if you've seen this, for balancing:

https://www.rcgroups.com/forums/showthread.php?1267814-How-to-dynamically-balance-EDF-unit-with-a-cell-phone

Devcon126/09/2018 10:42:18
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1396 forum posts
487 photos

If it helps I've gone for the 11 blade FMS unit, rightly or wrongly.

Although slightly heavier I think I can shave the odd gram from other components to manage the weight, I've also assumed the logic that I can achieve similar power levels to the recommended unit but at lower throttle positions whilst that extra little bit of grunt when needed.

I'm curious as to how nice an 11 blade unit sounds.

Nigel R26/09/2018 11:15:39
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3403 forum posts
524 photos

There's also the WeMoTec Micro if you're feeling a bit flush.

ken anderson.27/09/2018 14:09:32
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8523 forum posts
773 photos

ordered the sabre kit on Monday...delivered today(thurs)..14.00... that's service for you......thanks to Slec/Tony nijhuis…. ive also run up the hobbyking 50mm edf …..no problems either…..job's a goodin …

ken anderson...ne...1...… sabre dept.

Tim C27/09/2018 14:48:54
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498 forum posts
259 photos

d1a49596-5773-4fa4-b20a-028b45457cc2.jpeg Well my FMS 11 blade 50mm edf fan turned up today from Banggood, the AEO unit was out of stock. I ran a quick bench test, 73g out the box, runs very smooth and surprisingly quiet, on. 2200 3s 320 Watts on the meter a little over 30amp on full chat. Holding it over the kitchen scales showed in xs of 700g of thrust, a crude measure but interesting, will be interested to see the equiv measure once installed

ken anderson.27/09/2018 14:55:11
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8523 forum posts
773 photos

if you can get 700g of thrust in the model...it will go like a Goodin for sure.

ken anderson..ne...1...….700G dept.

trebor27/09/2018 16:31:32
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1921 forum posts
216 photos
Posted by ken anderson. on 27/09/2018 14:09:32:

ordered the sabre kit on Monday...delivered today(thurs)..14.00... that's service for you......thanks to Slec/Tony nijhuis…. ive also run up the hobbyking 50mm edf …..no problems either…..job's a goodin …

ken anderson...ne...1...… sabre dept.

Ken, every time I look on e Slec site I can't find any sabre kit where's it hiding ? dont know

ken anderson.27/09/2018 16:46:29
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8523 forum posts
773 photos

hello Trebor, you need to go on tony nijhuis site and order it via there.....and it looks as though its put together and dispatched by slec…

 

ken anderson...ne...1....EDF dept.

Edited By ken anderson. on 27/09/2018 16:47:31

trebor27/09/2018 16:53:24
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1921 forum posts
216 photos

I would never have found it yes

trebor27/09/2018 16:59:54
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1921 forum posts
216 photos

Which one, Sabre or Mig crying undecided.

Devcon127/09/2018 18:44:34
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1396 forum posts
487 photos

trebor... both.devil

On a separate note an EDF power source is completely new to me. I think I'm happy with the normal questions regarding inlet and exhaust cross sectional area but curious if I should remove the curved front inlet shroud from the fan unit and mate the the internal diameter of the duct directly to an inlet tube.

I say this as I read somewhere that the standard curved inlet shroud is only needed if the unit is mounted either externally or directly at the front of a model.

Link attached to an image of what looks like a shroud minus the front piece.

Am I overthinking this ?

Edited By Devcon1 on 27/09/2018 18:49:27

Steven Shaw27/09/2018 21:09:29
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344 forum posts
187 photos

Is there room for an inlet duct with the battery and an ESC under the pilot? I understand that's why the cheater holes are required, because of the poor airflow around those componrents.

Edited By Steven Shaw on 27/09/2018 21:34:36

Devcon127/09/2018 21:34:45
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1396 forum posts
487 photos

Good point Steven, I should have added I plan to try and position the Rx, ESC and Battery into a built up/hollowed drop tank which Tony Nijhuis points out makes a good launch hand hold. I'm hoping to utilise this space to enable a clean inlet run/tube.

Worst case scenario I could enlarge the plan by a little.

Ron Gray27/09/2018 21:57:14
1604 forum posts
394 photos

@Devcon - I think that you are overthinking it! TN has written that the bell mouth effectively does away with the need for an inlet duct and that the 50mm EDF unit provides plenty of oomph for these models.

Devcon127/09/2018 22:37:26
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1396 forum posts
487 photos

You are correct. I will keep it simple. Too much time thinking...😁

ken anderson.28/09/2018 08:12:05
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8523 forum posts
773 photos

lots of model edf's use cheater hole's,scoops to feed the fan with air...

ken anderson..ne..1.... feed the fan dept..

Nigel R28/09/2018 08:57:35
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3403 forum posts
524 photos

Is a nice smooth inlet duct better than the bell mouth intake?

Its clearly more difficult to achieve (especially on something this size).

Ron Gray28/09/2018 09:04:14
1604 forum posts
394 photos

A nice smooth, purpose built inlet duct is more energy efficient than the bell mouth, but the extra weight etc building one into a balsa built model, rather than a composite one which can be moulded, negates the ‘extra’.

ken anderson.02/10/2018 09:32:53
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8523 forum posts
773 photos

up here in ne...1..land we've started the Tony Nijhuis EDF sabre...…(project X)...

silver sabre.jpg

sabre1.jpg

sabre.jpg

ken anderson...ne..1....area 51 dept.

Nigel R02/10/2018 09:37:41
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3403 forum posts
524 photos

Looks remarkably realistic ken - top job! yes

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