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Description
Rovan 30.5cc 4 Bolt Single-cylinder Two-stroke 2.856 Hp Engine for 1/5 HPI KM RC CarRovan 30. 5cc 4 Bolt Single cylinder Two stroke 2. 856 Hp Engine for 1 5 HPI KM RC Car Features: . Stable quality, high horsepower, use NGK CMR7H spark plug and Walbro 668 carburetor to make the engine run better and more stable . Fuel: two stroke engine oil FB 1: 25 gasoline blended oil or two stroke engine oil FD 1: 40 gasoline blended oil . Working Principle: The process of moving from one end of the cylinder to the other end when the piston
Rovan 30.5cc 4 Bolt Single-cylinder Two-stroke 2.856 Hp Engine for 1/5 HPI KM RC CarFeatures:
.Stable quality, high horsepower, use NGK CMR7H spark plug and Walbro 668 carburetor to make the engine run better and more stable
.Fuel: two-stroke engine oil FB 1:25 gasoline blended oil or two-stroke engine oil FD 1:40 gasoline blended oil
.Working Principle: The process of moving from one end of the cylinder to the other end when the piston reciprocates in the cylinder is called a stroke.
.A two-stroke engine is an engine that completes one duty cycle in two strokes.
.Start Mode: hand pullback
.Intake Mode: scavenging
.Cooling Method: forced air cooling
.Lubrication Method: mixing
.Suitable for the Crowd: 14 years old or older
.The product is suitable for use in a 1:5 scale model car or model ship, model airplane and other equipment. It can also be used for classroom display and as a teaching aid.
.Note: Please use it carefully during operation. Do not touch the motor fan with your hands to avoid scratching. Do not touch the cylinder part with your hand to prevent burns.
Specifications:
.Color: As Shown
.Material: Metal + Plastic
.Cylinder Diameter: 36mm
.Stroke: 30mm
.Displacement: 30.5cc
.No Load Maximum Speed: 19000rpm
.Maximum Power: 2.1/13000 KW/rpm
.Maximum Horsepower: 2.856/13000 PS/rpm
.Maximum Torque: 1.76/9000 N·m/rpm
.Clutch Contact Point Speed: 8000/rpm
.Idle Speed: 4500 ± 200 / rpm
.Product Weight: 2200g
.Package Dimensions: 20 x 20 x 19cm
.Package Weight: 2300g
.Packing: Box
Package Content:
.1 x Engine Model
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 1882 reviews
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Product Reviews
★★★★★ 5
Comfortable Socks, color variety not as implied
Size: Medium, Color: True Gray Heather Assorted (6 Pairs)
Pros: Comfortable socks, with wide, not tight band at the ankle. Wish I'd bought them sooner.
Con: Amazon description shows a photo of 6 pairs of socks, 2 black, 2 gray, and 2 white. The pack actually comes with 2 black, 1 white, and 3 pairs of gray.
Haven't washed them yet. Will see how they stand up.
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Reviewed in the United States on June 14, 2024
★★★★★ 5
Not polyester! Thank you UA!
I never realized shopping for cotton socks in 2024 would be so difficult. Luckily I found these, and all the other Under Armour cotton socks and they are the best.
I cannot wear polyester, and these only have like 1%. I didn't realize our cotton is being replaced by polyester, and I don't like it. Bath towels don't work anymore either...
I need my cotton socks and towels, I love incandescent light bulbs, I'll always have a gas powered mower and leaf blower. Also butterfinger should've never their recipe. Just sayin...
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Reviewed in the United States on May 4, 2024
★★★★★ 5
Great quality
Size: Large, Color: True Gray Heather Assorted 2 (6-pairs)
The best socks, cotton quality
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Reviewed in the United States on June 28, 2025
★★★★★ 5
Great sock for everyday
Size: Large, Color: Black/Gray (6 Pairs)
So these are awesome but they are slightly thinner than older versions, shorter too. Just FYI if you a long time UA customer.
If you have never had their socks, I love them personally and only like one other brand better. They aren’t overly thick and they allow your feet to breath. I never have sweaty feet in these even in my warm boots. I also like that they don’t cut into my feet or get holes in the toes over long terms. The only reason I’ve thrown these out has been fraying near the ankle or someone (kids) thieving them.
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Reviewed in the United States on December 28, 2019
★★★★★ 5
LOVE THEM!!
Size: Small, Color: (001) Black / Black / Castlerock
LOVE! These socks are so comfortable! I wear a 5 in women's and a 3 in big kid shoes. The small fit me perfectly. I see where some say they run small but I can't say that was an issue for me. They are "snug" but thats what you want with a no show sock. I feel they have support vs the ones i used to buy at Walmart. They are very soft! I am actually buying more today and throwing my other ones in the trash!
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Reviewed in the United States on February 18, 2026