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#1 f35vertical Oct 07, 2012 03:22 PM

F35 vtol from italy
 
Hello, I have made ​​30 flights a complete transition from vertical to straight, to improve directional control in hover I added a mini fan 27 mm at the rear. C is someone who has done something similar with a fan?

F35 VTOL FLY (1 min 22 sec)

#2 leadfeather Oct 07, 2012 05:08 PM

Great job!

So there is just one main ducted fan and one mini fan for pitch and yaw control?

It looks like there are vanes under the main fan. What do they control?
Anyone that has tried this type of transitioning VTOL craft knows it is not easy.

Congratulations on a fantastic project!

#3 f35vertical Oct 07, 2012 06:26 PM

The flight is assigned to the main fan, vettorabile in 2-axis swivel and 3 positions 0, 45 and 90 . a small fan 27 mm is placed in the queue and serves only for the control of the directional hovering

#4 leadfeather Oct 07, 2012 06:49 PM

Quote:

Originally Posted by f35vertical (Post 22939417)
The flight is assigned to the main fan, vettorabile in 2-axis swivel and 3 positions 0, 45 and 90 . a small fan 27 mm is placed in the queue and serves only for the control of the directional hovering

Do you think it is possible to remove the 27mm fan and use the vanes for yaw control?

#5 f35vertical Oct 09, 2012 01:04 AM

2 Attachment(s)
I tried but the command in the stream carried away too much importance to the fans and was ineffective. Excellent system is to take a portion of flow to the fan with a tube of depron Please install a valve and a flow diverter for use as yaw control for hovering. see photos
I send you also a test drive with the model controlled by the tube depron visible under the fuselage, facing forward. The system is best for very low weight but less effective than the minifan. Moreno

F35 Vtol - From Vertical Take Off to Horizontal Flight di Moreno Lippi (1 min 8 sec)

#6 sergiot78 Oct 10, 2012 04:12 PM

Very very nice
You are very good! congratulations

How long can you hover ? 3 mn ?
Do you use a 70mm EDf? Which battery
What is the weight of the model ?
Thanks for the answer

#7 f35vertical Oct 11, 2012 01:23 AM

2 Attachment(s)
Thank you, range 2 to 3 minutes, total weight 900 grams, 70 mm fan. gens 2250 battery 4-cell, 58 ampere consumption in hovering.
Moreno.

#8 happysamuel Oct 11, 2012 11:26 AM

Quote:

Originally Posted by f35vertical (Post 22969691)
Thank you, range 2 to 3 minutes, total weight 900 grams, 70 mm fan. gens 2250 battery 4-cell, 58 ampere consumption in hovering.
Moreno.

May i ask how can the 70mm edf push more than 1kg?

I got a 70 mm edf with 5 blade using 4050 kv with 4s cell 14.8V but can only push
till around 700g my whole plane (F-35) weight around 900g~ can't even modify it to VTOL f-35......

Do you have any suggestions for me to make improvement?

#9 f35vertical Oct 12, 2012 12:27 AM

I've tried a lot of fans on the bench for more than 1 kg of thrust to be put in a cell more. I have fans with 3700 kv motor that gives me 1450 g thrust at 62 amps. Important not to make long flights otherwise burn the motor. Important to use good batteries, often after the first 5, 6 flights get older and do not raise more than the floor model! Take a test stand and controls thrust and consumption in watts. Moreno

#10 lochead Oct 13, 2012 07:04 AM

Very beautiful!:popcorn:

#11 happysamuel Oct 13, 2012 10:49 AM

Do you know any website talking about duct fan, how to choose good blades with corresponding to motor?

Since i have totally no idea where to find them......

#12 f35vertical Oct 13, 2012 03:22 PM

I do not know, I have done many tests whereas now the aeromodelling materials are cheap. 25 years ago it was different, everything cost so much and what they bought had to be good for strength ....

#13 native18 Oct 13, 2012 04:00 PM

Good job.
What flight controller are you using?

#14 swami Oct 13, 2012 04:51 PM

Quote:

Originally Posted by happysamuel (Post 22990113)
Do you know any website talking about duct fan, how to choose good blades with corresponding to motor?

Since i have totally no idea where to find them......


You can find a lot here: http://www.jepe.org/indek.htm


Dirk.

#15 happysamuel Oct 15, 2012 10:08 AM

To: f35vertical

I would like to ask how did you derive the equation of motion of your f-35 since there are problems on the rolling and pitching problem due to disturbance from environment during hovering...

It is really a big problem to deal with, as you only got 1 edf to hover your plane...:confused:


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