[canadianice]

I am thinking of using the 12 blade 6cell Dr.Madthrust from hobby king in my E-flite f 4 phantom. Looking for some input on the quality and performance of these units any help greatly appreciated

[NDW]

Jeff,
Not the 90mm dr. MADD thrust but I've been using the 50mm all summer. Great quality and well balanced and after about 40-45 batteries through it, it's holding up well. Not kero but sounds pretty darn close... I've got a 70mm on order for my composite viperjet.

[airbourne]

Originally Posted by canadianice

I am thinking of using the 12 blade 6cell Dr.Madthrust from hobby king in my E-flite f 4 phantom. Looking for some input on the quality and performance of these units any help greatly appreciated

Unless I've inhaled some magical poppies on my way home from work, the Phantom takes an 80mm fan and the Lander/Dr. Mad Thrust 12 blade are 90mm.

Your choices at the moment are limited to the stock eflite fan or a Jetfan 80, although I've heard there may be more 80mm choices in the future.

[canadianice]

With a little mod you can put a 90 in it. I did it to the Habu. I just want the whoosh sound as well as a little more blow.

[airbourne]

Little mod? Care to share some details, I know a half dozen guys that would love to try something like that.

[canadianice]

First you have to make new mounts and then mod the intake and thrust tubes not really that much. This time though I am going with 6cell instead of 8 it was too heavy 9 lbs flew fast and landed fast not much fun.thats why the 6cell 12 blade Dr.Madthrust this time.

[Eric S.]

I have 2 of the older DPS/lander units from hobbyking and love them. The Dr Mad thrust units have a 1 piece impeller while the units I have look like changesun blades but the shroud is the same and I believe they use the same motor as well. If they are the same as far as sound, balance and performance go, yo'll love them as well. I have 2 of the 70mm units as well. One sounds pretty good while the other was out of balance and is currently apart for balancing. The 70mm units don't sound anywhere near as good as the 90mm but the sound is still a big improvement over 5/6 blade fans Just so you have an idea, here's a vid of my Euro with the 90mm DPS unit and one of my HK Rafale with the 70mm unit.

You Tube

You Tube

You Tube

You Tube

[airbourne]

Originally Posted by canadianice

First you have to make new mounts and then mod the intake and thrust tubes not really that much. This time though I am going with 6cell instead of 8 it was too heavy 9 lbs flew fast and landed fast not much fun.thats why the 6cell 12 blade Dr.Madthrust this time.

Could you take any pictures of what you did? Modding the intake sounds like it would be rather involved. Would like to know as I have an opportunity to buy a couple used F4 airframes locally.

Re: Dr. Mad Thrust 90mm Fan, probably not the best choice for the F4 as it's a very heavy fan unit added to an already heavy plane.

If you can run 90mm then sky's the limit, I would go with a lightweight 8S Wemo Evo setup with HET motor on 2 X 4S 3300mah packs.