More from Buddy RC →SunnySky X3525 Brushless Motors
$49.99$58.50Save 15%
In stock at buddyrc.com
The SunnySky X3525 Brushless Motors are CNC-milled outrunners with hand-wound coils, a 5mm stainless steel shaft, 6061-T6 aluminum caps and NMB bearings, offered in 520, 720 and 880 KV. The 520KV version weighs 243g, handles 6 to 8S and up to 76A for 10 seconds, which suits mid-size electric planes needing strong, efficient power.
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Highlights
- Choice of 520, 720 or 880 KV
- Hollow CNC-milled design for heat dissipation and lower weight
- Heat-treated 420 stainless steel 5mm shaft
- 6061-T6 aluminum caps and NMB bearings
- Hand-wound coils for higher continuous output
Best for
Electric plane pilots sizing a 35mm-class motor for 12 to 14 inch props.
Things to consider
- Detailed specs in the listing are for the 520KV version; confirm cell count and ESC size for 720 and 880KV.
- 520KV specs call for a 60 to 80A ESC, sold separately.
- Pick props carefully; the listing's thrust tables use APC and DXL props.
Key specs
| Price | $49.99 |
|---|---|
| KV options | 520, 720, 880 |
| Stator | 35mm dia, 25mm thick, 12 slots, 14 poles |
| Shaft | 5mm |
| Weight (520KV) | 243g |
| Max LiPo (520KV) | 6 to 8S |
| Max current / power (520KV) | 76A / 1,918W (10 s) |
| ESC (520KV) | 60 to 80A |
Our take
Well-built motors with published thrust data at a fair price. Verify specs for the KV you choose.
SunnySky X3525 Brushless Motors at a glance
| Brand | Buddy RC |
|---|---|
| Price | $49.99 (was $58.50) |
| Type | Motor |
| Options | 3 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 $49.99, the SunnySky X3525 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 15% below its listed price of $58.50. 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
Which KV should I pick?
Lower KV (520) suits higher voltage and bigger props; higher KV (720, 880) suits lower voltage. The listing's detailed figures are for 520KV, so check SunnySky's chart for the others.
What props are recommended for the 520KV?
APC 12x6, 12x8, 13x6.5, 13x8 or DXL 14x8.
Does it come with an ESC?
No. A 60 to 80A ESC is recommended for the 520KV.
Is the SunnySky X3525 Brushless Motors on sale?
Yes. Buddy RC lists it at $49.99, down from $58.50 (15% 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 X3525 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 X3525 Brushless Motors come in?
KV: 520, 880, 720.
Where can I buy the SunnySky X3525 Brushless Motors?
The SunnySky X3525 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 X3525 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 X3525 Brushless Motors expensive?
At $49.99 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.
