220kph on GPS is not "rocking my socks off" anymore.
Goal is over 300kph. I have too many 4032 props lying around.

• Battery - 100g. 6S 650mah (maybe save 2g shortening wires)
  https://pyrodrone.com/products/gaoneng-g...ttery-xt30
  

• Frame - 35g PodRacer4"
  https://pyrodrone.com/products/tbs-sourc...cing-frame
  

• FC/ESC - 8g GH743 40A
  https://pyrodrone.com/products/jhemcu-gh...0ablheli_s
  
  

         or this one: https://pyrodrone.com/products/foxeer-re...5-5x25-5mm

• Prop - 3g 4032 
  I use 4023 so much, all the bags of M5 4032 are collecting dust)
  

• Cam/RX/VTX - 8g - Foxeer Toothless2, ELRS915, PandaAir 400mw
  

Total so far: 163g

Just need 2400-2500KV motors.
GEPRC 2105.5 2600KV 21g each -  looks good, but wont fit M5

From practical experience, screws, solder etc.. need at least 10g.. its already too heavy.
So... max 20g motors, and/or shave 10g on frame.

Any motor or frame recommendations?

20g motors in 2105 size?

RCINPOWER GTS V3 2105 Plus ?

http://rcinpower.com/G-SERIES/2021/08-18/53.html

20g with M5 prop shaft.

You may struggle with the KV but just get the 2950KV motor since you seem to be building a drag race quad.

Although the 2959KV motors are rated for 4S but should do 6S without much effort and give you the additional RPM you require on 6S.

Hi Roman,

If you get that JHEMCU GH743 40A 3-6S board be sure to check the 
5 volt regulator during and after the build. I bought 2 of these boards and 
the 5 volt regulator was BAD in both of them.

The first board also blew the ESC; not sure why, it just did.

The second board, I tested more thoroughly during the build. Now,
I caught this earlier; a 5 volt BEC was spliced into the receiver power
leads in order to power the 5 volt rail. It worked. Now, this is on my
Rescue Quad build so a few grams of extra weight didn't really matter
to me as the thing is heavy anyway.  

I have a sub250 5 inch build that is VERY fast and I use the fpv cycle cinwhoop motors. They are 17g with the wire so you would be at about 231g about. I do not know if they would work with that frme though. I use a brlther hobby hyperbola 5inch frame, a mini mamba stack, panda rc nano vtx, foxeer cam, and xt-30

But it looks like you want it 6s based on the battery you are looking at. I use a gn3 1100mah lipo for my battery.

Here they are

https://fpvcycle.com/products/fpvcycle-2...-choose-kv

---

I use 4s

I use 4s

https://druckbaer-racing-frames.de/#
druckbear frame would work, if speed is the goal only, an unibody without protective top would go faster.

for climb over 200kph on such low pitched rotors, i believe you will go the crazy danger road with heat on very high rpms/kv.

i guess the limiting factor will be the rotors, will they perform on such rpms/forces, will they perform on higher speed?
i believe it wont climb 170kph on that props, maybe the old hq4043 would outperform in upper kph.
more intressiting shining thing, difficult to mesure, would be the acceleration and response for me.

realy intressted to get your experiences

Hi Roman,

I bought one of those 4 inch Druckbaer frames. It is light, however, it doesn't look very strong,
but I did get the Ultralight version. Maybe it is stronger than it looks. Mine cost $ 85 USD delivered.
I live in Florida, USA. Personally, I thought it was a little pricey for what you get.

For me, if the frame gets damaged in a crash that is just it. I won't be getting any parts. That will 
just be it and then I will to a different frame.

So, you will flying at a bazillion kph...don't crash. 

The PodRacer that you linked is about the same weight and only costs $ 23; you could buy 4 of them.
 

the specs tells more than 10g difference.
@ifly4rotors isnt the druckbear 23g line tbe description?

the druckbear is a very old frame, from a past 250g limitation aera in germany. there was a lot effort on ultralight performance quads.
it was allowed to fly without a spotter if the quad was less than 250g in germany, limitations we can just dream about today in the whole world xD

(26-Jun-2022, 01:00 AM)hugnosed_bat Wrote: the specs tells more than 10g difference.
@ifly4rotors isnt the druckbear 23g line tbe description?

the druckbear is a very old frame, from a past 250g limitation aera in germany. there was a lot effort on ultralight performance quads.
it was allowed to fly without a spotter if the quad was less than 250g in germany, limitations we can just dream about today in the whole world xD

Hi Bat,

OK, here are all the numbers

Druckbaer Ultralight 4 inch is listed at 24 grams presumably with 3mm thick arms.
Druckbaer Ultralight 4 inch Race is listed at 33.4 grams with 4mm thick arms.
PodRacer 4 inch Ultralight is listed at 35 grams with 4mm thick arms.

FPVCycle PowerPick is listed at 24 grams for the 4 inch version (on sale for $ 19.95 USD).
This frame is comparable to the Druckbaer Ultralight 4 inch version.

So, to be truly accurate, yes, the Druckbaer Ultralight (non-Race) is 11 grams lighter than 
the PodRacer and the same as the FPVCycle PowerPick. I have the Druckbaer Ultralight 4 inch 
(24g) frame and it doesn't look very durable. When I build mine, I will be very careful where and 
how I fly it. I just hate to trash an $ 85 USD frame. For me, this frame will be purely endurance 
and going for longest Fly Time, not speed.  I bought the Druckbaer frame since you speak highly 
of it. I wanted to see if it was as good as you seem to indicate and see how it compares to other 
frames.

Notice that the RACE version of the Druckbaer is only 1.6 grams lighter than the PodRacer so I 
am counting that as a draw. 

So, I guess if the absolute lowest weight is the primary consideration, then either the Druckbaer
or the FPVCycle would be a good choice since they are the same weight. 

Now, it would come down to other considerations. Things like price, availability, delivery time, parts, 
and such. It took a long time for my Druckbaer package to arrive. Maybe if you live close to Germany, 
you get things quicker.

Later, iFly      

Looks like PowerPick is good cheap choice.

Good point about props. There is only so far 4032 can take you. For top speed like a 4055 biblade would be perfect.

Alas, you had two DOA GH743. Ughh.
Anybody have the Foxeer AIO FC yet?

Hi Roman,

Yeah, I also have the PowerPick frame. They both look and feel pretty similar.
Thing is, I don't think you get any more product for a way more money especially
if it is going into a build that could potentially destroy the frame on any flight.

Regarding the JHEMCU GH743 40A AIO...I would stay away from them.
Personally, I would be willing to bet that there is a whole batch of junk 
GH743 AIO boards out there. In fact, I will NOT buy that particular board 
again...PERIOD.

What will be sad, is if there are enough bad products out there to tarnish the 
JHEMCU brand and give them a BAD reputation.  

That said, I don't know if the issue is just with that product or if the regulators
and ESCs got into the other FC boards as well. It would not surprise me if more
than one product is affected.

I picked up a few of the 4” PowerPick frames when TBS had them on blowout for $3. It’s actually a really solid frame, and has handled a number of hard crashes without shattering into pieces.

No issues with arm flex, but, I’m only running 2004 motors on the one I have built.