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Description
Alpha Dragon IV.21 3P Level 21 3.49cc Off-road Vehicle Methanol EngineAlpha Dragon IV. 21 3P Level 21 3. 49cc Off road Vehicle Methanol Engine Features: . Original genuine engine, unique structure design, exquisite craft quality, light and compact, excellent performance, quick to start and easy to adjust . Parameters: Displacement: 3. 49cc; Revolving speed: 38800rpm; Weight: about 361g; Crankshaft Diam: 14mm diameter; Glow Plug Type: Turbo pressure boost glow plug (P3 P6); Exhaust: Rear; Carburetor Diam: 8. 8mm;
Alpha Dragon IV.21 3P Level 21 3.49cc Off-road Vehicle Methanol EngineFeatures:
.Original genuine engine, unique structure design, exquisite craft quality, light and compact, excellent performance, quick to start and easy to adjust
.Parameters: Displacement: 3.49cc; Revolving speed: 38800rpm; Weight: about 361g; Crankshaft Diam: 14mm diameter; Glow Plug Type: Turbo pressure boost glow plug (P3 / P6); Exhaust: Rear; Carburetor Diam: 8.8mm; Carburetor: 3 Needles; Engine housing: aluminum housing
.Alpha dragon IV is a new generation of high specification pre-grinding 3p engine with new design and modification. It is fuel saving, easy to adjust, and has excellent performance. After a little debugging, it can be used.
.Features of New design parts as follow: the body has been redesigned to increase intake and exhaust efficiency and improve fuel flow from the carburetor to the combustion chamber, thereby reducing losses, increasing fuel efficiency and increasing engine power. Ceramic post - perlin: Reduced friction, lighter weight, extended service life. This ceramic post - perlin is a basic part of the dragon IV. Using high-quality materials can apply more kinetic energy to the wheels with less resistance, reducing the friction coefficient. Lighter weight reduces rotation resistance, increases engine power and acceleration, reduces fuel consumption, and makes the engine more fuel efficient. Dynamic balancing crankshaft: reduces engine vibration and has good lubricity. The new DEC crankshaft contains an Alpha patented counterweight balance that effectively balances power transmitted from engine ignition to piston pins. The inertia force of the connecting rod and crankshaft rotation reduces engine vibration and increases engine power. This dynamic balancing counterweight crankshaft, with a new cylinder piston, makes more power and more linear power for maximum output. The new cylinder piston's air intake has been redesigned to provide oil savings, more power and more linear power for maximum output. Piston pin: the piston pin is light in weight and enhances surface hardness and durability to reduce the possibility of piston pin bending. Radiating head: the new radiating head adds a layer of radiating fin, and is lowered to lower the center of gravity to make the car more stable, better handling, when loaded on the car, it can maintain good radiating effect
.Safety Instruction: The engine is not a toy! Please read the instruction manual to become familiar with the features of the product before operating. Keep yourself and those around you safe. To maintain the best engine performance and longer service life. Incorrect or faulty maintenance can result in damage to the product.
.For Ages: 14+
Specifications:
.Color: As Shown
.Material: Metal
.Product Weight: 361g
.Package Dimensions: 18 x 12 x 10cm
.Package Weight: 450g
.Packing: Box
Package Content:
.1 x Engine
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4.1 ★★★★★
Based on 975 reviews
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Product Reviews
★★★★★ 5
A #MustRead for cybersecurity practitioners
Format: Kindle
Rick Howard's latest book is the ultimate reference for cybersecurity practitioners, making it an essential read for anyone in the field. With his straightforward and refreshingly irreverent writing style, coupled with his profound technical knowledge, Rick has created a narrative that is easy to understand and grasp. He delves into the foundational aspect of cybersecurity, which he refers to as the cybersecurity first principle, which he then it to specific high-impact strategies.
The book has eight well-written chapters providing a comprehensive overview of those strategies. Importantly, Rick then offers an up-to-date and thorough exploration of the complementary capabilities (tactical-level tools) that can be utilized to "reduce the probability of material impact due to a cyber event" - the cyber first principle.
In the concluding chapter, Rick succinctly summarizes his contribution to the field, stating, "And that's it. Those are all the tools you need to design, build, and enhance a cybersecurity program based on first principle thinking." This assertion highlights the value of his book as a practical guide for designing and improving cybersecurity programs with a focus on first principles.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2023
★★★★★ 5
Absolute must read if you oversee any portion of a cyber security program!
Format: Paperback
I loved this book. The concepts and ideas presented are a great wake up call for an industry that is so focused on blinking light hardware and the next big technological thing...this book challenges the paradigm that you need to strip your security culture down to some very core ideas...then build a solid security program around your security first principle(s). Without that core idea, you're just throwing away money on tools that may not actually be addressing your root needs.
Great read for anyone looking to rethink their security program, security culture, and security spend.
BRAVO!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 7, 2025
★★★★★ 5
Context, Strategies and Wisdom in a single package
Format: Kindle
This was my first book I have read by this particular author. I had spent some time looking for a comphrensive approach to Cyber Security and found many other texts to be lacking. Certain aspects are well documented, but no single source that brought it all together. This is exactly what First Principles brings to the table. As a practicioner that looks for better ways to formulate the objectives of SecOps Use Cases I have found the methods presented in this book to be immensely helpful. I have also given copies aways as a gifts to students who are just entering the field as this is by far the best intro to the long history of Cyber Security that combines the best direction for the future. The historical context that the author brings through first hand experience is beyond a treasure trove. It has been said many times in cheezy ads, but honestly, if you only read one book on Cyber Security make it this one.
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Reviewed in the United States on June 21, 2023
★★★★★ 5
My title review
Format: Paperback
Great book , up to date and very good reading
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 15, 2025
★★★★★ 5
Every cybersecurity professional should read this book, probably twice
Format: Audiobook
This is the Phoenix Project for cybersecurity professionals.
Every chapter of this book brought clarity and a new perspective from the way industry approaches aspects of cybersecurity. The book won’t be all things to everyone, nor is it perfect, but its the single most practical and effective approach to cybersecurity I’ve found. In a time where IT is excruciatingly complex and securing environments seems like an impossible task, this has been invaluable and has affected how I think about the future.
Im not associated with the author in any way. Im just in a leadership role facing these challenges every day and I think this book may some day become mandatory reading in the field.
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Reviewed in the United States on July 23, 2024
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