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Oct 31, 2019, 07:44 AM
Trith_FPV
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Build Log

iFlight XL7 V4 Long Range build


Hey all,

Here is my next build. Its currently in parts at home. Tonight after work, I'll start. I was looking for a nice mid-long range platform that will yield me nice cinematic footage. I have not decided yet on the battery size. I may go 4S, but if power is an issue, I might go for a larger 5S battery. My goal is 10min air time. Here are the parts Ive already purchased.
  • Frame: iFlight XL7 V4 True X 7 Inch 285mm Long Range FPV Frame
  • Flight Controller: iFlight SucceX-E 2-6S F4 30x30 Stack/Combo
  • ESC’s: iFlight SucceX-E 45A 32bit 4in1 esc– (part of stack) *
  • Motors: EMAX ECO Series 2306 1700Kv Motor's
  • Propellers: Dal Prop Cyclone T7056C PRO Propellers
  • FPV Camera: Foxeer Predator Mini v4 1000TVL Super WDR 1.8mm
  • FPV Transmitter: RDQ Mach 3 Video Transmitter 25-1000mW VTX
  • Antenna: LUMENIER AXII 2 Long Range 5.8GHz Antenna (RHCP)
  • Receiver: FrSky XM+ SBUS 2.4GHz Mini Receiver
  • Misc: RDQ PCB Wire by Joshua Bardwell x 4 – 7.16
  • GPS: BN180 GLONASS+GPS

I will eventually move over to a Crossfire Micro receiver. That's my next upgrade. For now, Ill toss on an XM+ I have for testing. The final build will be crossfire for extended range.

I've attached a couple pictures. Ill continue to add more as the build progresses and hopefully share some video footage by this weekend.

My main concerns were motor / prop sizes.. and of course battery size. Any input would be appreciated!

Updated! Maiden flights.
Posted below 11/16/19

XL7 V4 | 5S R-Line | BF4.1 | RPM Filtering (3 min 50 sec)


Needs to be tuned more, but the 36F temps and 14 mph winds weren't helping! Still held pretty good!
Last edited by TR1T0N; Nov 16, 2019 at 08:14 PM.
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Oct 31, 2019, 07:38 PM
Trith_FPV
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Made some progress tonight
Nov 01, 2019, 08:07 AM
Trith_FPV
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Here's where I left off last night. Just a few more components and Ill be configuring in beta-flight. Should be ready for the weekend.
Nov 01, 2019, 04:58 PM
Registered User
This is a bad build.

2306 is too small motor. 7056 is very aggressive prop.

Best case, you will only slow hover and have wobble in video.

Worst case, overloaded motor smokes the instant you throttle up.

Irregardless of emax "exceptional" engineering/marketing, the 2306 is just a light 30g meant for 5".

Minimum you should:
- only use 7035 props or 6".

For 7" you will be MUCH happier with 2507/2508. I use 2806.5.
Nov 02, 2019, 07:54 AM
Trith_FPV
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I've been doing this a while. The standard used to be 2204 motors. My first build slung 6" props no problem on those tiny motors 4 years ago when props were nylon glass composite. Over the last few years, I've seen this hype build up where its assumed bigger, is better. But that's not the case.

I just flew 6 packs. It has far more grunt then I thought actually. I can cruise at 27% throttle and consume only 9A in the process. I just got a 7min flight with a 1550mah 4S.

IT grips, it rips, and it feels great. Ill toss up a video later. These motors are butter smooth and come down cold > BF 4.0.5 < Max amps only reached 87A. Most cruising is done at or around 35% throttle.
Last edited by TR1T0N; Nov 02, 2019 at 01:10 PM.
Nov 04, 2019, 05:32 PM
Registered User
Its a mystery.

These sneaky motor manufacturers publish specs and recommend only 5",

but if you are a "long time user", secret mode unlocks for bigger props !!

Joking aside, I dont doubt you flew those motors with 6". I believe you that your motors were not hot.

Many people overprop, to save $. What do you gain saving $5 on a $300 quad?

In 4 years you said you only used the 2204.
Why not use them with bigger 7".. or 10". Why not 2207? Why not 1407? Why not 2" props on you 2204?


Bottom line. Mfc test/recommendations are there for a reason. Have 1 less BigMac meal if necessary - get the +$5 motors that you know are right fit.
Nov 05, 2019, 02:50 AM
Registered User
2306 motor is totally fine for a 7 inch build.
It's not much heavier than a 5 inch anyways.

You will not get good flight time out of those 2306 1700KV motors though.

I'd recommend Brotherhobby Avenger V2 1200KV: https://www.banggood.com/Brotherhobb...r_warehouse=CN

Also, 6S 4000mAh Li-ION Samsung INR21700-40T.

I get 18 minutes flight time out of this.

First ascent - Long Range FPV | new 6s 7inch build | Betaflight 4.0 | 4k (4 min 45 sec)
Nov 05, 2019, 03:13 PM
Trith_FPV
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Motors are easy to swap out. Its not a big deal for me. I was looking for a reason to try these new EMAX ECO motors. So I figured, why not. I've always been a fan of EMAX motors. They've never done me wrong. I have an F3 Freestyle build that's almost 3 years old now. It still has on the original RS2205 Emax motors and they are still super smooth.

Fast forward 2 years, I have a newer 5" build that rocks the LS2206 EMAX motors. Those have been awesome as well. So when I saw EMAX came out with a new (11.99) dollar option. I became curious and at 11.99 a motor. Why not?

I just updated my FC to BF4.1 last night. ( on this new 7" build ) I have 5S 1550mah 120C Tattu R-Lines coming in this week. It felt pretty solid on 4S. It was easy to get a 5min flight pushing it. 7min was possible if I just cruised at 30% throttle.

Im used to getting 3 min max flights on my 5" builds. So anything over 5min for me in the air blows my mind. Its a relatively light build. Maybe thats working in my favor.

** Note : The reason I went with the 1700KV motor, and not anything lower.. I was looking for something that would be 4S friendly. Since I have far too many 4S battery's already. But also something I could dabble with 5S on.
Last edited by TR1T0N; Nov 05, 2019 at 03:21 PM.
Nov 05, 2019, 03:22 PM
Trith_FPV
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Quote:
Originally Posted by gorro
2306 motor is totally fine for a 7 inch build.
It's not much heavier than a 5 inch anyways.

I get 18 minutes flight time out of this.
Beautiful video. I wish I had that back yard!
Nov 07, 2019, 11:05 AM
Trith_FPV
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5S comes in today. Will test this weekend. I also have some HQ 7x4x3 props coming in as well. Something a little less aggressive than the DAL's. Id like to see the difference. See if Im missing anything.
Nov 16, 2019, 08:15 PM
Trith_FPV
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36F with 14mph winds. Not the greatest flight conditions, but fun regardless!

XL7 V4 | 5S R-Line | BF4.1 | RPM Filtering (3 min 50 sec)
Nov 18, 2019, 08:53 AM
Trith_FPV
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First round of tuning :

XL7 V4 - 5S Freestyle (3 min 43 sec)
Nov 22, 2019, 03:48 AM
Registered User
Quote:
Originally Posted by gorro

Also, 6S 4000mAh Li-ION Samsung INR21700-40T.

I get 18 minutes flight time out of this.

https://www.youtube.com/watch?v=-3xZkOLWJag
I got inspired by you and your epic video :crush:

For "slow" cruising, I hope 2-3A (per motor) is enough.(throttle limit a must!)

I just got some beefy 26650 5200mah. problem is it will be 6x100g =600g!! probably better fit on my 15" quad


EDIT:. Unless I use exact same battery as you, I think even with only 12-15A the voltage sag will be too high. Also your 21700 are only 70g
Last edited by romangpro; Nov 22, 2019 at 03:59 PM.
Nov 24, 2019, 08:52 AM
Tero215
Quote:
Originally Posted by romangpro
This is a bad build.

2306 is too small motor. 7056 is very aggressive prop.

Best case, you will only slow hover and have wobble in video.

Worst case, overloaded motor smokes the instant you throttle up.

Irregardless of emax "exceptional" engineering/marketing, the 2306 is just a light 30g meant for 5".

Minimum you should:
- only use 7035 props or 6".

For 7" you will be MUCH happier with 2507/2508. I use 2806.5.
Yeah, goodo, maybe try saying it a bit more nicely, and you are wrong anyway
Nov 24, 2019, 11:08 AM
Trith_FPV
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It's all good Teroq, I've finished my build with 2306 motors and it's flies beautifully. 5S 1550mah gets me over 7 min. I have 1800mah otw now. Trying for 10 min.


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