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Electrifly Synapse RxR Ducted Fan Jet Review
By FLYWINGFAN
Jul 07, 2008, 09:02 PM
Introduction
Electrifly's Synapse RxR, (also available as an ARF), was designed around the Hyperflow ducted fan unit. With the provided Ammo 20-40-3500 brushless motor, this trim little unit can put out some blistering numbers: try 13.7 oz of thrust at over 35,000 RPM with a 3s LiPo battery pack! With a ready to fly weight of around 13 oz, this bird promises some adrenaline pumps!
Kit ContentsThe Synapse is made to get you in the air in a minimum of time. It comes fully assembled with only the receiver that you provide to install. It is designed so that you can pretty much drive to the field from the hobby shop, open the box, put in your receiver, set your throws and fly. The plane is shipped assembled in the box, so you can store it in the box, and keep it in the trunk for lunch break flying impulses.
Kit Contains:
Kit Requires:
AssemblyWith the exception of sticking velcro on the bottom of the battery area, there really isn't any assembly. Be sure your receiver is well secured and doesn't hamper the canopy. The manual shows installation with a standard 72 mhz reciever, and when I installed the R606FS, the only thing I had to do different was mount the two antennas at 90 degree angles to each other for best reception.
Assembly Tips:
Futaba 2.4 GHz radio system
The Synapse is a very quick airplane that responds to your inputs in a flash. This makes it a lot of fun to fly, but also means you don't want to have to think about radio range, glitches or anything in between. The 6 channel 2.4 GHz Futaba micro receiver is the perfect solution. It is very compact, has two antennas which are mere inches long, and its signal reception is on rails.
CompletionSet the throws according to the manual; they worked great for me. Be very careful if you like high throw rates! The Synapse becomes quite touchy if the throws are much more than recommended. Pay close attention when balancing the model: It has a fairly short moment and has a sensitive CG so I would probably not recommend just finger balancing it. Make sure the battery is charging, and start doing some finger limbering exercises!
Flying
After Several flights with the Synapse , I noted a servo which, under full throttle, displayed erratic behavior. It seemed as though a loose solder joint was causing interference from the vibrations created at full throttle. I sent it back to Bing at Electrifly, and received back: "This is a very rare situation in the tens of thousands of these servos that have gone out to the market. However, in the effort to continually improve the quality of our products... we sent the servo to our manufacturer and asked them to pay attention in production, and QC processes to minimize the potential of this occurring again in the future."
Launching and LandingLaunching requires a nice straight heave or a run and toss. This plane definitely likes its air speed. Be very easy on the stick while the plane is accelerating because moving those elevons around creates a fair amount of drag. Landing is simple, but give yourself plenty of room; it’s easy to overshoot because the Synapse doesn't bleed off speed all that well. I found myself setting and resetting up my first couple of landings until I got the hang of how long it took to slow down. Be sure to clear the air scoop of any debris after every landing; filling that impellar up with grass would not be a good idea!
BasicsThe Synapse doesn't have much in the way of bad habits. Stalls don't happen very abruptly and are easy to recover from. A tribute to the swept and tapered wing tip design, virtually no snap is exhibited. Spins only happen if you make them and are easy to recover from with proper altitude (I say proper altitude because everything happens fast in this plane). Turning and burning down low is fun, but I probably wouldn't try it too slowly.
Aerobatics/Special Flight PerformanceThe Synapse sounds amazing on high speed flybys. I don't have a radar gun, but I don't need one to know it gets small really quickly! Rolls are axial and quite fast. Nailing full aileron is probably one of my favorite things with the Synapse, it is so fast and precise. Loops are round and as big as you want them. Inverted is easy and just about neutral. Be sure your battery is well secured, magnets only hold the hatch!
Flight Video/Photo Gallery
Thanks to my brother Phil for the photography!
Is This For a Beginner?Absolutely not. This plane is for the experienced flyer with at least one aileron plane firmly under his belt.
ConclusionTwo thumbs up! The Synapse excels at satisfying speed craves and is a great performing little package. While the paint is easily marred, I would still rate the overall fit and finish of the model as great. If your synapses aren't firing faster by the conclusion of your first flight, I envy your piloting skills!
Pluses:
Minuses:
Last edited by Angela H; Jul 08, 2008 at 09:01 AM.. |
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Jul 07, 2008, 10:21 PM
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#2 |
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Registered User
 
Join Date: Dec 1999
Location: Greenville, NC, USA
Posts: 8,758
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Would you please post the power specs on the stock set-up ? watts, volts and amps
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Jul 07, 2008, 11:37 PM
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#3 |
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$$$ Cash for RC Carnage!
 
Join Date: Dec 2006
Location: NYC
Posts: 1,128
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Don't forget it stalls like crazy if you make a turn during take off......or low to the ground
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Jul 08, 2008, 12:51 AM
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#4 |
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We shall serve the Lord
Join Date: Sep 2005
Location: TEXAS
Posts: 1,661
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Nice review, but for some reason, the video links only take me back to the RCGroups home page. Anybody else having that problem?
Mike McD |
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Jul 08, 2008, 12:54 AM
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#5 |
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Stone Mountain RC Flyers
Join Date: May 2006
Location: Stone Mountain, GA
Posts: 1,901
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Yeah I got the same problem. I don't think the videos are uploaded or the links are bad.
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Jul 08, 2008, 02:08 AM
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#6 |
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Team Compass USA
Join Date: Jul 2007
Location: San Bruno, California
Posts: 2,320
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the video link kinda scared me a little, i thought it was spywares
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Jul 08, 2008, 06:38 AM
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#7 |
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Administrator
Join Date: Nov 2006
Location: Nashville, TN
Posts: 1,238
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Strange! The videos were there before! I'll try to get that fixed today, fellas.
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Jul 08, 2008, 08:36 AM
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#8 |
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getting a shift on
Join Date: Jun 2005
Posts: 4,073
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Good review but "fast" is a really relative term.
Even without a radar gun, what other models would you compare it to? I remember when I thought the Parkzone Focke Wulf was fast! 
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Jul 08, 2008, 08:47 AM
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#9 |
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Registered User
Join Date: Sep 2002
Location: Minneapolis MN
Posts: 1,653
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Hey guys, Ang and I are working on the video problem.
Kevin Murray, 3S, 15-16 Amps, 170-180 Watts WOT Smokescreen38, Good call, I would probably put it in the Brushless Stryker Category maybe a little slower. It can be a little deceiving sometimes simply because of how small it is. Thanks for the comments guys, throw any more questions you have out there. ~Sam S. |
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Jul 08, 2008, 09:01 AM
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#10 |
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Administrator
Join Date: Nov 2006
Location: Nashville, TN
Posts: 1,238
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Videos fixed!
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Jul 08, 2008, 01:43 PM
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#11 |
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Registered User
Join Date: Aug 2003
Location: NJ
Posts: 7,630
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The wing snapped on landing?
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Jul 08, 2008, 02:04 PM
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#12 | |
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Registered User
Join Date: Dec 1999
Location: Greenville, NC, USA
Posts: 8,758
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Quote:
Thanks for the numbers Sam. |
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Jul 08, 2008, 07:08 PM
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#13 |
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Registered User
Join Date: Sep 2002
Location: Minneapolis MN
Posts: 1,653
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Mexico & Kevin,
Kevin hit the nail on the head, the canopy simply popped off. I've flown inverted for over a minute, pulled inverted loops and never had it come off in flight. The one piece carbon wing spar would require a pretty enormous amount of force before breaking. ~Sam S. Last edited by FLYWINGFAN; Jul 08, 2008 at 07:15 PM. |
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Jul 08, 2008, 07:51 PM
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#14 |
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AKA Optimus Prime
Join Date: Dec 2006
Location: Shreveport Louisiana
Posts: 2,574
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There is a carbon spar for each wing and they go about an inch into the fuselage. It is not a one piece carbon rod from wing to wing. Found out because the CG is not accurate to the model either. I balanced it exactly to the models specifications last September and it was nose heavy. Elevator was sluggish and it took more up trim than my transmitter had and when I would let go of the stick it would head straight down. Everything I did I did by the book, my throws and the CG was on a machine rather than my fingers. Also notice the servos twitched really bad with the motor vibration and the hatch wouldn't stay attached with out being pinned down. Went through 3 crashed while moving the CG back a little each time. The last time made it tail heavy and the resulting crash left nothing to rebuild. I was thoroughly disappointed in the product. I contacted great planes on the matter and they said ship it in and they would determine whether or not they would warranty it. After finding out shipping would be around $40 on a maybe, I decided to cut my losses on this one. The $150 esc went to my Seawind which is a joy to fly and I have servos, motor and fan unit collecting dust. The rest I chucked into the trash. I wish I could have enjoyed the product as others have. It looked cool and I was very excited but the let down has soured me on this product. I wish you all the best of luck.
Orion |
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Jul 09, 2008, 07:45 PM
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#15 |
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Registered User
Join Date: Sep 2002
Location: Minneapolis MN
Posts: 1,653
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Orion,
Thanks for the correction, two piece it is. Regardless, each spar makes the wing quite stiff. Sorry to hear about your bad experience, Im curious about the sluggish elelvator comment; do you mean the elevator servo was slow or the pitch response was slow? |
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