The SirenA f35 It really is the best 3.5-inch quadcopter you can get. Not only does the little guy fly perfectly, but it’s also incredibly rugged and can take a real beating.
SirenA F35
MSRP $102.00
Direct orders from our website are $75
Once the product is available through regional distributors, the retail price will be standardized at $102
Once the product is available through regional distributors, the retail price will be standardized at $102
Weight 74g* Wheel Base 167mm Frame Type Sqaushed X Stack Mounting 20x20mm (M2/M3) Cam Support DJI / Walksnail Motor Mounting 12x12mm (M2) Vtx Mounting 20x20(M2)/ 25.5x25.5(M2) Support Prop Max 3.6inch Standoff Height 20/26mm
*The theoretical value may deviate slightly from the actual value
Carbon Fiber
- Top Plate 2mm x1
- Front Plate 2mm x1
- Rear Plate 2mm x1
- Lock Plate 2mm x1
- Arm 4mm x4
Hardware
- M2x6 Button Head -16/pcs
- M2x23 Countersunk -4/pcs
- M3x6 Flat Head -2/pcs
- M3x6 Button Head -10/pcs
- M3x10 Countersunk -4/pcs
- M3x13 Countersunk -6/pcs
- M3x14 Countersunk -4/pcs
- M3x20 7075 Standoff - 6/pcs
- M3x26 7075 Standoff - 2/pcs
- Profiled Spacer 3 - 6/pcs
Accessories
- TPU Cam Shell x1
- TPU Front Bumper x1
- TPU Capacitor Mount x1
- TPU Antenna Mount x1
- TPU M2 Nut x4
- TPU Action Cam Mount x1
- Rubycon 35v390uF ZLH x3
- ParaCap PCB x1
- HSA Tube x1
- M2 Rubber Spacer x20
- Battery Pad x1
- Battery Strap x2
- Backup Screw Pack x1
* The TPU antenna mount is configured based on the selected VTX system. The default setup supports antennas using a plastic tube mount. A fully enclosed antenna mount is sold separately.
Flight Controller 20x20 M2/M3 Mounting Hole ESC At least 30A 4-6S Motor 4S: 3500-4000kv
6S: 2400-3000kv
with 12x12mm mount base Prop 3.5" - 3.6" Battery 4S 850-1200mah
6S 750-1050mah
United States & Canada
- ePacket : $10
- DHL Express : $30
Europe
- ePacket : $10
- DHL Express : $30
Australia & New Zealand
- ePacket : $10
- DHL Express : $30
Other Countries
- ePacket : $15
- DHL Express : $30
Shipping Methods
- ePacket — Economy tracked shipping.
- DHL Express — Fast express delivery with full tracking.
Notes
- Select DHL Express for the fastest delivery. One free extra spare arm is included with each frame.
- Shipping methods available may vary by destination.
- If DHL Express is unavailable for your destination, we may use EMS instead.
- All packages are shipped from Taiwan.
For full shipping terms and details, please see our Shipping Policy .
Die SirenA F35 schlägt ein neues Kapitel in unserer 3,5"-Produktpalette auf. Die ursprüngliche Siren F35 hat sich bereits einen festen Platz am Himmel erobert, doch wir haben einen klaren Wunsch aus der Community vernommen: Ihr wolltet ein Modell, das selbst extremste Bedingungen übersteht. Ihr habt nach einem Rahmen gefragt, der die Grenzen der Haltbarkeit neu definiert, ohne dabei seine Charakteristik zu verlieren. Die SirenA-Serie ist unsere Antwort.
Wir haben die gesamte Struktur neu konzipiert und sie aus QUADMULAs charakteristischer, hochwertiger Kohlefaser gefertigt. Dieses Premium-Material, bekannt für seine außergewöhnliche Steifigkeit und Langlebigkeit, bildet das Rückgrat des Rahmens. Darüber hinaus wurde die Chassis-Geometrie sorgfältig überarbeitet, um als physische Stoßdämpfer zu fungieren und Ihre Elektronik im Schadensfall zu schützen.
Für die Elektronik haben wir eine neuartige Dreifach-Kondensatormatrix für die 3,5"-Klasse entwickelt. Durch die Entwicklung einer speziell angefertigten Leiterplatte haben wir die Installation vereinfacht und gewährleisten eine optimale Stromversorgung Ihres Systems. Diese komplexe Designentscheidung haben wir getroffen, um Ihnen den Aufbau so einfach wie möglich zu gestalten.
Auch beim Schutz haben wir einen neuen Ansatz gewählt. Anstelle eines starren Aluminiumkäfigs haben wir eine neue TPU-Philosophie mit speziellen Kameraschalen entwickelt. Wir sind überzeugt, dass dies eine hervorragende Stoßdämpfung für Ihr Objektiv bietet und Ihnen gleichzeitig die kreative Freiheit gibt, Farben auszutauschen und Ihr Rig individuell anzupassen – etwas, das Metall einfach nicht bieten kann.
Unzählige Stunden an Design, Tests und Optimierung flossen in diesen Rahmen. Wir kämpften um jedes Gramm, um sicherzustellen, dass trotz erhöhter Stabilität die Flugleistung nicht beeinträchtigt wird.
Dies ist ein echter Bando-Rahmen, der die Wendigkeit einer leichten Konstruktion beibehält.
Erleben Sie absolute Langlebigkeit ohne Kompromisse.
SirenA F35
Angebot$75.00 USD
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SirenA F35
Angebot$75.00 USD
Uncompromising Durability
Built for Abuse: The Heavy-Duty 3.5”
Engineered for pilots who exist at the ragged edge of control. Featuring rigid 4mm arms and a heavily reinforced chassis, the SirenA prioritizes survival above all else. The calculated structural weight adds a sense of inertia and confidence to every maneuver, ensuring you keep flying while others are walking home.
Pure Power Delivery
Low-ESR Triple Capacitor Matrix
We’ve moved beyond standard filtering. By utilizing a custom QUADMULA parallel PCB, our innovative 3-capacitor array dramatically lowers ESR compared to traditional single-cap setups. This delivers cleaner power to your ESC, guaranteeing maximum stability and silky-smooth flight performance, even under the heaviest throttle loads.
Based on the principle of ESR (Total) ≈ ESR (Single) / 3, distributing the equivalent capacity across three units achieves significantly lower resistance than a single large one.
Steel & 7075 Aluminum Backbone
Full M3 Architecture
We took a zero-compromise approach to the primary chassis. By utilizing substantial M3 hardware and robust 7075 standoffs for the main structure, we achieved a level of torsional rigidity and impact resistance rarely seen in this class. It’s calculated overkill, ensuring your frame remains rock-solid flight after flight.
Complex Engineering, Simple Form
C-Lock T2 Rigid System
At the heart of the SirenA lies our C-Lock T2 technology, a mechanical interlocking system designed to eradicate arm slop and vibration. It ensures the frame remains stiff and responsive, creating a direct, telepathic connection between your stick inputs and the quad’s movement.
Maximize your time in the air
Single-Bolt Quick Swap
Our smart design allows for rapid arm replacement by removing just a single bolt. No need to disassemble your stack or disturb your electronics—get back to flying in seconds, not minutes.
HSA Lightweight System
Introducing our proprietary Hybrid Screw Assembly (HSA). By pairing custom YFS M2 hardware with a specialized vibration-damping sleeve, this system offers full M2 and M3 stack compatibility. This smart design slashes weight by 60% compared to standard M3 bolts without sacrificing structural security.
Maximum protection tailored to your lens
Dedicated Cam Shell
We provide dedicated Cam Shells for each supported lens, ensuring a precision fit and superior protection. Anchored by our proprietary PS-2 system, the camera is locked mechanically without compressing the TPU. This prevents material deformation, resulting in a fixation significantly more rigid and reliable than direct screw mounting.
Rock-Solid Mounting & Lens Defense
Integrated Action Base
We expanded the mounting geometry to maximize stability and eliminate camera wobble. This robust base integrates a protective design that directly shields your FPV lens from impacts.
3D Print Ready Official STL Support
We designed a comprehensive protection suite for this frame. Pick up the official TPU kit from our store, or access the free file library to print replacements on demand.
Verwenden Sie die Pfeiltasten links und rechts, um zwischen Vorher- und Nachher-Fotos zu navigieren.
F A Q
We chose to exclude the 9x9mm pattern for two critical reasons:
- Durability First: Supporting dual mounting patterns requires removing excessive material from the arm ends, creating stress risers that weaken the carbon. The single 12x12mm layout keeps the arm tip solid and robust.
- Performance Consistency: 9x9mm motors (commonly 1404 size) are generally underpowered for the SirenA's reinforced chassis. We designed this frame to be flown with high-torque motors that utilize the 12x12mm standard, ensuring you get the locked-in flight experience we intended.
The SirenA 3.5” was engineered with a singular focus: Bando and Aggressive Freestyle. To achieve the structural integrity required for this level of abuse, we prioritized absolute durability over ultralight metrics.
While we have optimized the weight as much as possible, the reinforced nature of the SirenA makes a sub-250g AUW virtually impossible without severely compromising component selection. Forcing a sub-250g build on this frame would result in an unbalanced setup and a poor flight experience.
Choose the right tool for the job:
- If a strict Sub-250g limit is your priority, please choose our standard Siren Series.
- If you demand a tank that survives the hardest hits, the SirenA is for you.
Customer Reviews
Overall rating: 5.0 / 5 from 32 reviews.
Awesome product
my favorite frame little bit 5 inch little bit mini but tough
The Quadmula SirenA is an excellent freestyle frame—lightweight, durable, and designed with a clean deadcat layout that keeps the propellers out of the camera view. It has a solid, practical design that makes building and maintaining the quad straightforward, while giving you plenty of room for HDZero hardware. A great choice for smooth, flowy freestyle flying and clean footage.
Best builds always Quadmula
Alles super. Kann ich nur empfehlen
This frame is rippping
Had to get the little brother of my F5 😍 love Quadmula frames 👌
My version of the SirenA F35 Build with 6S Axisflying Argus mini F7 AM32 Stack. RCInpower 1804 GTS V3 2450kv Radiomaster RP3 Airunit 04 Pro Gemfan 3630 props and a little beeper. It's flying really great. Was super easy to tune. No frame resonances at all. I'm not a bando-basher but fly most of the time over concrete. So i replaced the alluminium TPU spacers with ones i made from hardened C-steel. The only thing i don't like about this quad (and my other ones from Quadmula)... There is no space to add a normal buzzerr like the one from Matek. Or even a Vifly Mini. This would be great. Had to mount a really tiny one in the rear antenna-holder.
Let me just start by saying i got into this hobby with a 3.5inch frame by a different company and siren F35. Instantly fell in love with F35 chassis and proceeded to build an F5 S2 and SirenA F35. Built this one on january 22nd of 2025 so this will be a 4 months review! Build experience - I was extremely satisfied with 2 things : large space and PCB setup. I was able to conveniently fit a buzzer, PCB setup and a receiver! Also, installing dual capacitor setup for siren F5 S2 was not an easy task but this triple PCB setup was a breeze. Actual flying(or bashing) experience - Quadmula claims that they created this frame to withstand brutal abuse and they were certainly not lying. I always order 2-4 extra arms with my frame orders and have not had to replace one just yet. It's worth mentioning that i built mine as a 6S build weighting at 288g dry weight so crash impacts are certainly huge for a 3.5 inch chassis. Overall, It's always a pleasure to build and fly quadmula frames. The packaging, quality, customer service and agile flying characteristic everything just lines up perfectly 👍
Awesome frame, easy to build in and bullet proof!
I have a Quadmula-Frame in every size but is is the best frame for me. A perfect freestyle frame for a not so perfect pilot. I ran it in the ground or against obstacles and all it needs to bring it back in the air is a new set of props. Less repair - more flying. I like this a lot.
Quadmula!!! What can I say!!?? The SirenA F35 is hands down the most precise, detailed and robust frame I have ever flown! Honored to be selected for the draw to review such high quality craftsmanship drone frame. I've paired it with Geprc SpeedX 2105.5 - 2850kv motors, Goku H743 Pro FC, Goku 45A esc, HQ 3.5 props, DJI04 Pro and Tattu V6 1050 6S lipo. This combination has blown me away with speed and agility for freestyle in the Yukon. An amazing addition to all of my quadmula frames that I've been flying over the past few years! Not gonna lie but this SirenA F35 is getting way more flight time these days. To anyone considering building a drone....quadmala is the best in the industry! Happy flying to all! Limitless FPV
I can’t say enough good things about Quadmula frames. I own the Djinn F25 SP, the Siren F5 S2 and this SirenA F35. I can speak from experience on the durability of this frame. I spent an afternoon trying gap a hole in a brick wall about the same size as the quad. Twenty times I hit the wall at a considerable speed, not once did I hit the gap. No damage to the O4, no major damage to the frame. I’m starting to think I’ll never have to use the spare arms I bought. Bottom line is… If you haven’t chosen a Quadmula frame, you’ve already made the wrong choice.
Great tpu best I have found. Wish they sold it in rolls
I usually fly and build only 5inch Freestyle Frames BUT!!! The Quadmula SirenA F35 was my first ever 3.5inch build and it’s a Ripper of a Quad, the Quality of the frame is absolutely outstanding and so well made and thought out. I enjoy it that much and with the DJI 04 Pro fitted it beats all my other drones hands down, well down and thank you Quadmula.
A simple intuitive build, the extra deck space was really useful and made the whole experience really straight forward. Built with a GOKU F722 Pro mini V2 stack, DeepSpace 2006 2550Kv 6S motors and O4 Pro. I designed a couple of custom TPUs to hold the power lead the a Radiomaster RP1 - You can find them on thingyverse if you look up the user "AlvaroFPV".
One of the builds I enjoyed building This thing is an absolute ripper… super fun to fly. For a freestyle noob like me, this frame is proving to be seriously tough 💪 Congrats to Quadmula for this frame
It's one of my favorite builds, and even more enjoyable to fly. Tuning was a breeze, as it always is in Quadmula frames. From the carbon, to the paracap system, and even the TPU nuts, there's nothing left out, and at a very fair price. I recommend Quadmula frames as everyone’s first build for these reasons. It's more than a drone, it's a work of art.
It’s not like the older 3.5" quad systems. If you’re flying in a small bando and want to build an ultra-durable quad that isn’t quite as powerful as a 5-inch (but still very powerful), this would be the best choice. As you can see in the photos, I’m using a DeepSpace Aether 2006 2550KV motor, Gemfan 3630 props, and Foxeer F722 electronics with a Foxeer 45A ESC. This setup performs brilliantly. The energy distributed across three capacitors takes the load off the ESC and helps you recover much better from sudden, sharp inputs. You wouldn’t believe how many hard crashes I’ve had with it yet it just keeps going without a care. This thing is absolutely phenomenal!!! I LOVE IT!! No matter how much I thank the Quadmula team, it’s never enough!
I don’t think I’ve seen a higher quality frame than this. Decided on going with a Flywoo F722 mini stack and paired it with some Aether 2006 2550kv motors and had to go with the 04 Pro vtx. Added some high quality TPU prints to button it up. This is a perfect 3.5”.
Impressive. The quality of the frame, from TPU to the nuts and bolts that hold it all together, #chefskiss I decided to build her a bit outside the "norm" for me, usually I try to stay under the fairy limit, but this girl...whooo she's hefty, but that's ok, because she definitely uses that weight to her advantage! HDZero Stack, Brotherhobby 2005 2800kv motors, HDZeroRace V3 vtx, HDZero Micro Camera, Gemfan 3.6inch props
Another one with Hdzero and the Aether 2006 motors. Truly, I believe this frame, with a 6S setting is as good as it gets for a 3,5" freestyle package.
I built a 6S quad with this frame. Simply amazing.
Absolutely incredible to build and fly!!! Running 6S and 04 PRO with no issues.
A perfect, well‑designed frame with clean aesthetics—an absolute pleasure to fly. SirenA F35, Foxeer Reaper Mini 60A F4, T‑MOTOR F7 Mini, Moonlight, ELRS, R‑LINE 850 6S 150C, Action 2.
This thing is badass, flies smoother than any 3.5” I’ve built. Used VCI 1605 2450kv and 6s, and I’m so happy with it. Flies beautifully with minimal tuning. Was a little concerned with the extra weight and no 9x9 mounting holes, but support reassured me and recommended some build guidelines. Might be my favorite quads of all time because of the power, durability and how smoothly it handles. Will be building more!
This is another stunningly beautiful frame. It's absolutely perfect in the air. When cruising, the SirenA F35 is smooth in the turns, giving the feeling that it's gliding through the air. As soon as you really get the throttle going, it responds instantly to roll and pitch, just as it should. The SirenA F35 is more like a Bando freestyler.
Very nice frame. In front plenty of space, no strungle to fit all equipment inside. Back side stayed the same as siren f3, but o4 takes less space then o3. Arm thickness 4mm exactly good for 3,5”. Use motors with 5mm shaft, because all props of this size with 1.5 mm are tooooo britle, but with this frame u want to hit walls and tree branches and recover but 1.5 mm props fly away in many pieces on light touch.
great frame
Came quick and exact!
Amazing frame. Looks tough..need to remember this is still a 3.5 inch frame my 20 x 20 ESC stack I ordered was too big to fit between the standoffs. Now I am waiting on a smaller stack that fits. Can’t wait to fly it!