More from Buddy RC →SunnySky X3520 Brushless Motors
$46.99$52.50Save 10%
In stock at buddyrc.com
The SunnySky X3520 is a hand-wound brushless outrunner in 520 or 720 KV, built with a CNC-milled hollow bell, 6061-T6 aluminum caps, a Japanese 420 stainless steel shaft and NMB bearings. The KV520 version runs 4S to 6S and handles 70A for 30 seconds at 1750W. It suits large sport and 3D planes.
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Highlights
- KV options: 520, 720
- Hand-wound coils
- 6061-T6 aluminum caps and hollow CNC bell
- Heat-treated 420 stainless steel 5mm shaft
- Japanese NMB bearings
Best for
Pilots who want a sturdy 35-size motor for big electric sport planes.
Things to consider
- Specs are given only for KV520
- Needs an 80 to 100A ESC (KV520)
- This is the older X3520, separate from the X3520 V3 listing
Key specs
| Price | $46.99 |
|---|---|
| KV options | 520, 720 |
| Stator (KV520) | 35mm x 20mm |
| Weight (KV520) | 207g |
| Cells (KV520) | 4S to 6S |
| ESC (KV520) | 80-100A |
| Max power (KV520) | 1750W |
| Shaft | 5mm |
Our take
A well-built 35-size motor at a lower price than the V3 version.
SunnySky X3520 Brushless Motors at a glance
| Brand | Buddy RC |
|---|---|
| Price | $46.99 (was $52.50) |
| Type | Motor |
| Options | 2 KVs |
| Availability | In stock at buddyrc.com |
| Returns | Items can be returned within 30 days of receipt with an RMA code requested by email.… |
Price check
At $46.99, the SunnySky X3520 Brushless Motors is toward the top of Buddy RC's price range, whose 4,618 listed products run $0.25 to $9,999.
It's currently 10% below its listed price of $52.50. Sale prices can end without notice, so check the live price before you order.
Similar items from other brands we track run $59.99 to $189.99.
Frequently asked questions
What props are recommended?
For KV520, APC 12x6, 12x8, 13x6.5, 13x8 or DXL 14x8.
How is it different from the X3520 V3?
They are separate listings with different KV options; the V3 offers 495, 560 and 780 KV.
Is the SunnySky X3520 Brushless Motors on sale?
Yes. Buddy RC lists it at $46.99, down from $52.50 (10% off). Sale prices change, so confirm the live price on buddyrc.com.
What is Buddy RC's return policy?
Items can be returned within 30 days of receipt with an RMA code requested by email. Returns in new condition with original packaging have no restock fee; others are charged 10 to 20%, and shipping fees are not refunded.
How long does Buddy RC take to ship?
Orders placed before 2 p.m. EST usually ship the same business day from Columbus, Ohio, by USPS or UPS, with most packages arriving in 2 to 5 business days. Orders over $100 may ship free within the US, excluding most airplanes, and LiPo batteries ship only by UPS Ground.
Does the SunnySky X3520 Brushless Motors come with a warranty?
Buddy RC's published warranty terms: Products older than 30 days may be exchanged under warranty but aren't eligible for a refund. Specific warranty terms aren't published in the policy text.
What options does the SunnySky X3520 Brushless Motors come in?
KV: 520, 720.
Where can I buy the SunnySky X3520 Brushless Motors?
The SunnySky X3520 Brushless Motors is sold directly by Buddy RC on buddyrc.com. The Shop now button on this page goes straight to the product there.
Is the SunnySky X3520 Brushless Motors in stock?
Yes. Buddy RC lists it as in stock on buddyrc.com as of our latest check. Stock and prices refresh throughout the day.
Is Buddy RC a legit store?
Buddy RC is a strong pick for RC pilots who need specific parts, power systems or helicopter spares from a US warehouse with same-day dispatch. Skip it if you want generous returns, since shipping is never refunded and returns that aren't in new condition carry a 10 to 20% restock fee. Confirm the exact part number and motor or frame compatibility before ordering, because most of the catalog is model-specific. Our full Buddy RC review covers shipping, returns and what to check before ordering.
Is the SunnySky X3520 Brushless Motors expensive?
At $46.99 it is toward the top of Buddy RC's range ($0.25 to $9,999 across 4,618 products), and similar items from other brands run $59.99 to $189.99.
