Posts: 356 Threads: 70 Likes Received: 55 in 28 posts Likes Given: 31 Joined: Oct 2020 Reputation: 4 Hi guys, I would like to ask you a suggestion for a set of motors to be used for a 2.5 inch toothpick built on a GEPRC Phantom frame. I was considering T-motors F15, RcinPower 1204, GEPRC GR1107, GR1204, GR1105... but tables are quite confusing!  It's an analog quad with a weight between 135g and 160g AUW. Batteries are 4S (possibly optimized for 4S 450mah because I already own a set of four). Thank you in advance. ![[-]](https://intofpv.com/images/collapse.png) • Posts: 2,360 Threads: 118 Likes Received: 812 in 659 posts Likes Given: 128 Joined: Feb 2021 Reputation: 20 4s on a 2.5” toothpick… I just put a 3s on my tinyhawk freestyle (300mh).. seem a little “heavy”, I normally fly it on 2s (650).. and it flies great..
It has the stock motors.. I LOVE my twigxl 3” on 4s.. it’s fast and nimble.. • Posts: 356 Threads: 70 Likes Received: 55 in 28 posts Likes Given: 31 Joined: Oct 2020 Reputation: 4 (20-Sep-2021, 01:56 PM)Rob Axel Wrote: 4s on a 2.5” toothpick… I just put a 3s on my tinyhawk freestyle (300mh).. seem a little “heavy”, I normally fly it on 2s (650).. and it flies great..
It has the stock motors.. I LOVE my twigxl 3” on 4s.. it’s fast and nimble.. It's an analog conversion of a Phantom HD (I moved the Caddx Vista kit on another quad). In the original version with 4S 450mah and GR1105 5000KV worked great! I also tried it with 3S 600mah but it was too weak, that's why I wanna focus on 4s. • Posts: 736 Threads: 19 Likes Received: 608 in 419 posts Likes Given: 758 Joined: Jun 2020 Reputation: 31 (20-Sep-2021, 02:03 PM)Zanna83 Wrote: It's an analog conversion of a Phantom HD (I moved the Caddx Vista kit on another quad). In the original version with 4S 450mah and GR1105 5000KV worked great! I also tried it with 3S 600mah but it was too weak, that's why I wanna focus on 4s. One thing to consider is that you are removing the Vista unit which I believe is over thirty grams. The analog VTX should be much less weight which may make 3S a viable solution, especially if you change out the motors. It looks like the GR1105 6000kv version is for 2-3S for a 2.5". https://geprc.com/product/gep-gr1105-motor/ The slightly higher kv should give you more punch on 3S. • Posts: 590 Threads: 16 Likes Received: 176 in 149 posts Likes Given: 26 Joined: Jun 2021 Reputation: 8 I run my Phantom HD as a 3s 550mah with the GR 1105 5000kv SpeedX motors.
I flipped them upside down to run the quad as a 3" pusher. (much more authority in the air as a 3" with the extra 42% disc area, especially with the weight of the Vista)
The motors handle 2.5" and 3" perfectly on 3s. Although mine will definitely be staying as a 3", I think it handles the weight a lot better. • Posts: 21,292 Threads: 589 Likes Received: 8,980 in 6,646 posts Likes Given: 1,426 Joined: Jun 2018 Reputation: 789 I have the original analogue GEPRC Phantom which runs on 1103 8000KV motors and although I haven't flown it for a while (over a year), it flew reasonably well on 2S 450mAh LiPos. I intend to try some 3S 550mAh LiPos on it for a bit more power when some come into stock locally, although I'm unsure if the extra weight of those will have a detrimental effect on the handling or flight time with the stock 2.5mm props. I guess there is only one way to find out. The article below is also probably worth a read... https://blog.georgi-yanev.com/fpv/geprc-...-and-setup • Posts: 6,113 Threads: 172 Likes Received: 2,287 in 1,834 posts Likes Given: 4,737 Joined: Feb 2019 Reputation: 100 20-Sep-2021, 07:12 PM (This post was last modified: 20-Sep-2021, 07:13 PM by hugnosed_bat.) toothpick is the name of kababs 2,5" frame, he suggest 1103 8000kv on 2s 450mah. its lightweight and has special ultralight micro characteristics.
i would suggest the same, i fly my 1103 8000kv also on 300mah 3s batteries. the best quadweight is 50g, about 80g uaw.
this kind of ultralight micro would be what alot call: toothpick
your named uaw would be way to heavy for my taste. 2,5" on big motors you mention about is not a gently quad about handling. as example 1204 on 2,5" s for scaring and blame 5inchers in the parkhouse... it accrelate awesome...
are you sure you like a beast befor a gently and powerfull quad?
the gently version of your mentioned motors would be on 3inch.
1103-1104 on 2,5inch and 2-3s is still very powerfull, • Posts: 2,360 Threads: 118 Likes Received: 812 in 659 posts Likes Given: 128 Joined: Feb 2021 Reputation: 20 I thought the toothpick and babytooth was 3”… • Posts: 6,113 Threads: 172 Likes Received: 2,287 in 1,834 posts Likes Given: 4,737 Joined: Feb 2019 Reputation: 100 the babytooth is the name of the 3inch frame from kabab, its thought as 3inch 1s platform • Posts: 356 Threads: 70 Likes Received: 55 in 28 posts Likes Given: 31 Joined: Oct 2020 Reputation: 4 Got the point guys, thanks!!
All of you are suggesting to go for 3S with higher KV motors.
My preference for 4S is due to the fact that I own a set of 4 batteries 450mah which I would like to save from the shelf and also because on previous quad with GR1105 worked great.
The weight of the quad increased because I mounted a Vifly Finder V2 which I will remove soon because, even if the weight may be handled, the COG is no more centered. I will check the weight without that and then I will make some considerations. • Posts: 6,113 Threads: 172 Likes Received: 2,287 in 1,834 posts Likes Given: 4,737 Joined: Feb 2019 Reputation: 100 1105 or 1303 is very efficiency, 1204-1206 wil make it more powerfull.
i like t-motor, but their first micro motors like the f15 has some faults...the bell doesnt hold enough on the shaft. i would suggest to choose another 1105, if you go for that size • |
