Dr. Mad Thrust 50mm 10 Blade Alloy EDF 4000kv

• Overall
• Quality
• Value

Customer Rated

Jun 12, 2016

Pros:
1. Metal cowl
2. Very sturdy
3. Well balanced
4. Crazy cool sound!
Cons:
1. Maximum measured static thrust - 450g vs. 550 advertised (given that advertised thrust is static, isn't it), with all inlets and cheater hole (next to impeller) combined section 2 times the area of impeller (the fan was not air-starved)
2. Maybe it's just me, but I could not disassemble it. So much for full-serviceable :P

Overall - satisfactory, pretty good for the price. I was able to use existing 3S batteries and a 30A ASC - so no overhead expenses for me, when I bought it. Installed in 650g scratch-built Mirage2000 (yeah, over-engineered and therefore - overweight), when trimmed good gave about 40mph top speeds. I would give it 5 stars overall just for sound :) , but trying to be objective.

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Customer Rated

Feb 07, 2016

Es werden 550 Gramm Schub versprochen... Pustekuchen...

Mein Modell (Mini Kataka) wiegt flugfertig 450 Gramm, hier ist nicht mal annhernd so viel Schub vorhanden dass das Modell im Normalflug fliegen kann. Nicht mal mit einem krftigen Schwung beim Start. Dabei mssten 550 Gramm Schub ausreichen um das Flugzeug senkrecht nach oben zu befrdern.

Das ganze wurde an einem 3S 1400 mAh 40/80C SLS Akku und 60 A ESC versucht...

Da macht mein Fhn mehr Druck !!!

absolut NICHT empfehlenswert !!!

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Customer Rated

Jan 06, 2016

It's not ballanced at all.
my thrust stand says it's only givving me 300g of thrust don't buy them

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Certified Buyer Rated

Jul 17, 2015

Runs very smooth and quiet.

Draws 20 amps on 3 cells. I am going to build an F117 faceted foamie for it.

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Customer Rated

Jun 12, 2015

Absolutely poor performance. Put it on a 450g plane and could not get it airborne. I only measured about 100g of thrust on a scale. The only good thing about this product is that it's pretty sturdy, but what use is that if you can't even get your plane off the ground.

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Customer Rated

Jan 24, 2015

hoeveel trust hou ik over bij inbouwen bij f15 2 stuks ingebouwd , uitlaat 25cm lang inlaat 30 cm , toestel weegt 1200 gram spanwijdte 70 cm, gaat hij de lucht in?

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Certified Buyer Rated

Dec 01, 2014

great easy upgrade to get that bit extra out of the foamy

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Customer Rated

Jul 13, 2014

I received the unit nicely packaged and it looked high end, that is all it had going for it. I put it in my little 50mm f22 wanting the fabled 550g of thrust but it was pulling more like 150-200g which i wasn't able to keep airborne. I recently bought a 4s and cut two giant cheeter holes in the plane. With this setup I am able to get about a 4:5 thrust to weight. My plane weighs about 370g. I dont know if i did something wrong using this motor, but this is the worst product i have bought here so far.

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Customer Rated

Apr 17, 2014

Nicht Empfelenwert.
Keine Leistung wie angegeben. Strom aufnahme 18 A bei 3Zellen 1ooo mAh und 11V.
Sehr schn fr die Vitrine.

• Overall
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• Value

Customer Rated

Feb 01, 2014

Plane is 470g. Using 30amp esc and 40-65c 3s battery I don't quite have 1:1 thrust?
Not sure how (up to) 550g of thrust was measured but I seriously doubt even with a massive cheater hole and thrust tube anyone will ever see 550g of thrust on a 3S battery. I would say I'm getting 450g of static thrust. Sounds good but there is a little vibration at low speed, smoothest at high speed. May require a little tweaking. I'm curious what other people think???