|Nov 20, 2013, 07:02 AM|
Future Model 37.5" Yak 54 flat fuselage EPP plane
Future Model have created a 37.5" Yak 54 flat fuselage hybrid EPP plane. I received one in the mail a couple of weeks ago, but I was busy building my Future Model 48" MX2 (awesome plane BTW!) and only now can I turn my attention to this small Yak.
EDIT 1 Dec 2013: I found some specs and a product description on a Chinese website:
Future model 37.5in Yak 54 EPP Electric Aircraft
Wing Area: 28dm 2
Takeoff Weight: 580g (battery included 3s25c1000mah) groovejet says: "I suspect that you'll most likely be 600g+ based on the gear that you choose. Assume about 640g unless you are extremely focused on saving weight."
Motor: 2217; KV 970 brushless motor
Battery: 3S 11.1V 25c1000-1300MAh
Servo: 9g Plastic Gear Servo * 4
yak54 section epp aircraft we improved after several flight tests, we used a full solid body structure, fuselage before contrast hollow structure, the intensity increased a lot now, feel good, do not get in the hands soft feeling, installation of equipment is also convenient, beautiful and strong and increasing the overall strength, weight or to maintain weight hollow structure, flight performance is very good, in windy weather aircraft can slow down a very smooth landing, particularly stable performance speed flight , crane is easy to control, and does not have any distortion in high-speed aircraft violent action, 3D is the best choice for beginners to practice.
I've attached some photos from a prototype in China.
EDIT 30 Nov 2013: Here is a video of my plane flying in very windy conditions using tired old 3S1250 lipos that couldn't cope with the amps even though I prop'ed down a bit. Despite this, it flew well for a 650g plane in such windy conditions!
EDIT 3 Dec 2013: Here is a video of one flying in windy conditions in China.
|Nov 23, 2013, 07:04 AM|
Here is a video of a prototype flying in China.
My build is coming alone fine. Here are some pics that show its current state.
|Nov 30, 2013, 03:56 AM|
Hmmm not much interest in this thread........
I flew my Yak today and it was fun, though not the best plane for the windy conditions today. My Skywing 48" MXS and Future Model 48" MX2 handled the wind better at twice the weight.
The Yak flies well. The main issue I had was due to my only suitable lipos being many years old and clearly not up to the task of powering this agile little beasty around the sky as hard as I wanted them to. I prop'ed down to ease the load on the lipos, but they still complained, so I did the best I could with a lower power-to-weight ratio than I am used to and wind that was pushing this little plane around quite a bit.
Nac managed to keep up with this little plane (most of the time) using my video camera, so here's a video I put together that shows a full (but short due to old lipos) uncut flight.
EDIT 1 Dec 2103: I moved the video to post #1. Click on this link to go there http://www.rcgroups.com/forums/showp...50&postcount=1
|Nov 30, 2013, 10:00 PM|
I used less-than-optimal gear that I had lying around and I think from memory it weighs about 660g. You could save 20g of weight using more optimal gear than what is in mine.
|Dec 01, 2013, 05:49 AM|
Wow! I love this little plane!! It's fun!!!
I gave up on my tired old 3S1250 lipos and decided to try my old 3S1550 lipos that I hoped would still have enough juice left for this power setup. It turns out that they do .
I flew my Yak again today using the 30g heavier 1550 lipos. It was dead calm. Wow; what a difference!
It flies beautifully when it isn't getting thrown around by the wind as happened yesterday when we shot the first video of this plane. This Yak tracks really well and it is very relaxing and fun to fly around in small areas. I had a real blast flying this plane. I was doing heaps of slow rolling harriers, really low knife edge passes and lots of hovering. This plane is fun, fun, fun .
I plan to optimise my setup in a few areas. I will buy a slightly heavier motor that can handle the amps better than my current Hyperion zs2213-18 and I will buy brand new lipos in the 1300MAh range so that I can stop using my old 1550 lipos. Flying the Yak today on the heavy 1550 lipos was a good trial run for my expected AUW once I get a new motor and new lipos. This plane really impressed me and I look forward to when Nac can get something in the same weight class as my Yak so that we can fly together in some very small parks that we find are uncomfortably small for the 48" hybrid EPP planes that we commonly fly.
|Dec 01, 2013, 04:09 PM|
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