(17-Jul-2023, 12:16 AM)Lemonyleprosy Wrote: Excellent.

Is it ridiculously loud? I put some properly duct shaped StanFPV ducts on a 5”, and that thing sounded like a flying shopvac anytime the bottom side was pointed in my direction.

Yes!!! Lol I fired it up in the hallway and the dogs scrambled lol had to take it outside.

Sounds about right.

Looks great though, and I bet it’s ridiculously stable in the air.

(16-Jul-2023, 04:40 PM)iFly4rotors Wrote: Hi B4tn,

Nice.  It will be interesting to see the results and how you like it.

By the way, in a pusher configuration without ducts, the Phantom frame can handle 3-inch props.
Yeah, some type of landing gear is required. Someone on here did this, but my memory is bad 

Looking forward to seeing the results. 


Later, iFly  

I made one of my Phantoms into a 3" pusher with ducts and the ducts are the landing gear. I don't know if this is the build you were trying to remember...

Build thread here:
https://intofpv.com/t-3-2-3s-pusher

(17-Jul-2023, 01:02 AM)brettbrandon Wrote: I made one of my Phantoms into a 3" pusher with ducts and the ducts are the landing gear. I don't know if this is the build you were trying to remember...

Build thread here:
https://intofpv.com/t-3-2-3s-pusher

I was kind of winging it and building as I went. Didn’t even think to look if it had been done before . But I am totally going to steal the foam block idea. I may even see if I can tinker cad the prop guards as one piece. I can see they are going to cause a ton of vibration individually mounted.

Alright, so here is the maiden flight. It’s all raw footage from the Walksnail lite, no correction. It’s very windy today so I am not sure if the vibrations are from the wind, the tune, or both. But all said and done I am happy. It’s super easy to control even using my freestyle actual rates of 850, .4 expo. I got 6:20 flight time using a tattu 550mah 4s battery. The motors are 4500kv. I used the UAV tech 2-4” tune with rpm filtering on and low build quality. With this tune the motors are barely warm so I may switch it to medium build quality and see how they feel. I do think the ducts need tied together. They are pretty hefty and I could see one good crash snapping an arm. So I will probably use brettbrandon’s idea of foam and hot glue for now but will eventually re work the ducts to one piece. AUW with battery, all bolts, and tpu came to 204g.

(17-Jul-2023, 01:58 AM)B4tn Wrote: I was kind of winging it and building as I went. Didn’t even think to look if it had been done before . But I am totally going to steal the foam block idea. I may even see if I can tinker cad the prop guards as one piece. I can see they are going to cause a ton of vibration individually mounted.

The ducts I have are very flimsy and I can see them bending out of shape with vibrations. The ducts you have printed look much thicker and may not vibrate near as much. You may not have near the problem I had with vibration and jello...

(17-Jul-2023, 04:06 AM)B4tn Wrote: Alright, so here is the maiden flight. It’s all raw footage from the Walksnail lite, no correction. It’s very windy today so I am not sure if the vibrations are from the wind, the tune, or both. But all said and done I am happy. It’s super easy to control even using my freestyle actual rates of 850, .4 expo. I got 6:20 flight time using a tattu 550mah 4s battery. The motors are 4500kv.  I used the UAV tech 2-4” tune with rpm filtering on and low build quality. With this tune the motors are barely warm so I may switch it to medium build quality and see how they feel. I do think the ducts need tied together. They are pretty hefty and I could see one good crash snapping an arm. So I will probably use brettbrandon’s idea of foam and hot glue for now but will eventually re work the ducts to one piece. AUW with battery, all bolts, and tpu came to 204g.

From what I see in the video, you are not having anything like the vibrations/jello that I was getting. Even with the pads between the ducts on mine, yours is much cleaner than what I am getting. It also could be the tune on mine as I have no idea on how to tune a quad... It has the factory FC tune on it. I have been building quads for a few years now, maybe it is time to learn how to "tune" them. I have recently pulled the Runcam 4K camera/DVR from this build and it is now in my 3" Armattan Tadpole build not yet finished. I have been trying to get a descent "camera quad" that is still small, but records good jello free video (without a GoPro), but have not yet accomplished it.

Your build seems to be going great and wish you the best on the final version... The arms on the Phantom frame are pretty thin and possibly flexable, that is why I am trying the Tadpole frame as it is 3" vs 2.5" on the Phantom and has much wider arms that should be stiffer at right about six grams more weight.

Hope you don't mind, but I will keep tabs on this post to learn from your mistakes as well as your advancements.

(17-Jul-2023, 01:02 AM)brettbrandon Wrote: I made one of my Phantoms into a 3" pusher with ducts and the ducts are the landing gear. I don't know if this is the build you were trying to remember...

Build thread here:
https://intofpv.com/t-3-2-3s-pusher

Hi Brett,

Yeah, I think that is the build that I was thinking of.  

Now, since you and B4tn have Phantom pushers, I will just have to give it a go.
I will put that on my list. Yeah, I have a few builds waiting for me to find the time.

As you probably know, I don't tune my quads either. The only one that I even had
to do anything with was the Baby Naz X-1, however, that was primarily due to the
FC being shipped with basically NO tune. Even then, I just cut and pasted sections
from the file that you provided (THANKS) into the one that cam on the FC. I don't
know that I would call that tuning. More like, barrowing your tune. 

Later, My Friend, iFly  

Hi B4tn,

Excellent.       I like it.    Good Job      

The flight looks good and smooth to me.    I would be happy with that 

Later, My Friend,  iFly  

(17-Jul-2023, 04:43 AM)brettbrandon Wrote: From what I see in the video, you are not having anything like the vibrations/jello that I was getting. Even with the pads between the ducts on mine, yours is much cleaner than what I am getting. It also could be the tune on mine as I have no idea on how to tune a quad... It has the factory FC tune on it. I have been building quads for a few years now, maybe it is time to learn how to "tune" them. I have recently pulled the Runcam 4K camera/DVR from this build and it is now in my 3" Armattan Tadpole build not yet finished. I have been trying to get a descent "camera quad" that is still small, but records good jello free video (without a GoPro), but have not yet accomplished it.

Your build seems to be going great and wish you the best on the final version... The arms on the Phantom frame are pretty thin and possibly flexable, that is why I am trying the Tadpole frame as it is 3" vs 2.5" on the Phantom and has much wider arms that should be stiffer at right about six grams more weight.

Hope you don't mind, but I will keep tabs on this post to learn from your mistakes as well as your advancements.

Yeah, when it comes to tuning. I am still on the fence about how much of a requirement there is for it. I do make sure all my FC's have black boxes. And I did spend the hour or 2 logging, tweaking, repeat before. The end result.... Ididnt really notice anything. I find the stock Betaflight tune works pretty good on just about anything. If I am feeling adventurouse I will put one of the UAV tech preset tunes. But in all honesty I dont really notice a diffeence doing that either. I fly my 5" with a group of guys that have been flying since the begining and they are really good! They all rock the stock betaflight tune. I think it was one of JB videos that he was going over how to blackbox tune and he said something of the sort that even he is fine with the stock betaflight tune, but if you really want too this how you do it. I guess if I was trying to shave of 10ths of a second racing I might be more concerend but I just like to go out flip, flop, crash, rebuild, and repeat lol.

(17-Jul-2023, 11:48 AM)iFly4rotors Wrote: Hi B4tn,

Excellent.       I like it.    Good Job      

The flight looks good and smooth to me.    I would be happy with that 

Later, My Friend,  iFly  

Thanks, I did find a fix for the camera mount I am happy with. I printed a partial top plate for the camera box. I will post a picture later tonight when I get home from work. I am pretty happy with the smoothness. It definatley does not like quick manuevers, but then that might be a charactoristic of a ducted quad vs the toothpick style I am used too. I dont have a comparison so i dont know. My only concern right now is that the phantom arms are very thin. The ducts are big and heavy at the end of the long arms. I know a good crash will snap these arms. I need to either tie the ducts together to prevent arm movement or print some arm braces.

Hi B4tn,

I found it interesting that the Phantom frame actually broke on the "inside" of the 
plate rather than on the skinny part of the arm. The RED marks are the actual break.
This might have been due to the angle of the impact on the arm. Now, this was an 
open prop build and did not have prop guards. Still, I was a bit surprised at where
the frame did and did not break. However, if you look at the amount of material
where the break occurred, it is less than on the skinny part of the arms. 

A cheap reinforcement might be to put bolts with decent size washers (sort of like
fender washers) through those 16x16 mount holes (front) to provide additional support
in those areas. Of course, that would require dismantling the quad. Just a thought. 

NOTE: Some of the silver markings are the prop path over the frame.

Anyway, Later, My Friend, iFly 

(17-Jul-2023, 10:58 PM)iFly4rotors Wrote: Hi B4tn,

I found it interesting that the Phantom frame actually broke on the "inside" of the 
plate rather than on the skinny part of the arm. The RED marks are the actual break.
This might have been due to the angle of the impact on the arm. Now, this was an 
open prop build and did not have prop guards. Still, I was a bit surprised at where
the frame did and did not break. However, if you look at the amount of material
where the break occurred, it is less than on the skinny part of the arms. 

A cheap reinforcement might be to put bolts with decent size washers (sort of like
fender washers) through those 16x16 mount holes (front) to provide additional support
in those areas. Of course, that would require dismantling the quad. Just a thought. 

NOTE: Some of the silver markings are the prop path over the frame.

Anyway, Later, My Friend, iFly 

Very strange, I would not expect it to break in that spot!

Couple updates.  I added a parts list including the files I used for printing to the first post.  Pictured is the camera top plate I remixed from bottom plate STL I found.  the original plan was to add a third stand off directly behind the camera since there is available holes.  But doing this makes the battery hang off the back of the quad.  If I add the extra stand off I will need to toilet tank mount the battery which presents a new problem with where to put the strap lol.  But it turned out to be pretty stiff and the battery slides under it.  It now has a 3 hole mount over the top for most action camera mounts.  I also printed a TPU strap for the bottom to hold/protect the ELRS reciever.  

I tweaked around in betafligt a bit messing with PID's and Rates and came up with a tune I am happy with.  I am very pleased with how it flies and am still getting about 6 minutes of flight time.  I also came through the tree gaps a little hot and forgot I was not flying my 5" so miss calculated the throttle needed to recover from the fall.  In the below video the crash is at the end.  It doesnt seem bad on video but I hit the ground pretty hard and bounced.  It seemed to hold up well.  

As with my other videos and my mission to abandon windows, the video is edited and published using Ubuntu Linux and Kdenlive.  The video feed is from the walksnail goggle DVR.  the only thing I did was remove fish eye so there is no gyroflow correction or smoothing.  

Also, forgot to metion, I waterprrofed the boards with worryfree FPV silicone coating, my ultimate goal is to fly this rig over water. I probably wont be water crash testing though, I will just hope for the best. My 3.5" is fully waterproofed also. I was worried about heat issues but have not seen a single issue even on 85 degree days.