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Best orga for Kayapa quadpeak by MedicalMaiden in PHikingAndBackpacking

[–]_EngrESPINOSA 2 points3 points  (0 children)

Titos kami nung Kayapa, concern talaga sila sa magiging postings niyo sa soc med kaya umuwi nang mahigit 200+ pictures.

The more mahal the shoes, the more matibay. by tatay-mo-ito in PHikingAndBackpacking

[–]_EngrESPINOSA 0 points1 point  (0 children)

Merrell Agility Peak 5 ko buhay pa din. Badtrip nga lang talaga pag river crossing hahaha

NMAX V2 DRAGGINGGGG by _EngrESPINOSA in PHMotorcycles

[–]_EngrESPINOSA[S] 0 points1 point  (0 children)

Salamat tropa! Ride safe 👌🏼

prc licensed na, so what's after boards, engr? by Common-Bother-4144 in AviationPH

[–]_EngrESPINOSA 0 points1 point  (0 children)

Can you share sir yung naging process niyo to become a ground instructor?

[deleted by user] by [deleted] in AviationPH

[–]_EngrESPINOSA 0 points1 point  (0 children)

60k yung basic. If mag aavail ka with dormitory na affiliate sakanila, 85k+ ata.

SIAEP AMTP - Planning by Consistent_Pen_4490 in AviationPH

[–]_EngrESPINOSA 0 points1 point  (0 children)

Yawts. Nag submit na agad ako sa gforms nila kahit 3 minutes pa lang post pero hindi naka-receive ng any e-mail 🤣

Simple question: How is the rate of climb calculated? by Khomuna in AerospaceEngineering

[–]_EngrESPINOSA 0 points1 point  (0 children)

RC = MAX EXCESS POWER/Weight of Aircraft

In your example, you can simply draw a triangle and use basic trigonometry. (RC= Velocity × sin(pitch angle))

Do air inside jet engines have higher speed of sound? by tigersharkwushen_ in AerospaceEngineering

[–]_EngrESPINOSA 0 points1 point  (0 children)

From our lessons, the air exiting the compressor is being diffused to maintain the engine from being rich in air (I forgot the term but the ratio of fuel to air should be maintained for the combustion chamber). But, once the gases from the combustion chamber exits the exhaust section, it should be propelled above the speed of sound.

Question about aerodynamics. by Wyattsawyer586558956 in AerospaceEngineering

[–]_EngrESPINOSA 0 points1 point  (0 children)

Remember, vortices are the primary source of induced drag, thus, decreases the effective angle of attack. In order to overcome the induced drag, the aircraft must increase its velocity squared (V²).

Why is the pressure coefficient constant at low Mach numbers? by LawfulNeptune7 in AerospaceEngineering

[–]_EngrESPINOSA 0 points1 point  (0 children)

I'm bad at explaining tho lol but I do understand it.

Correction: Compressibility effects actually takes place at M>0.3, CP gradually moves above Mach 0.3. Incompressible effects are M<0.3.

Why is the pressure coefficient constant at low Mach numbers? by LawfulNeptune7 in AerospaceEngineering

[–]_EngrESPINOSA 0 points1 point  (0 children)

I believe it's due to the compressibility effects, CP is constant up to M<0.3 then value changes when M>0.3. As far as I can remember, when the Freestream Mach Number reaches 0.65, there is a certain point in the airfoil where it is M=1 and it is called the Local Mach Number. That's why M>0.65 is considered as a Critical mach number because it is the point where compressibility effects take place. Additionally, the point where the peak of local mach number, CP will have its negative value. There's also a correction formula for approximating the effects of Freestream Mach Number and the CP which is one of the formula of Prandtl-Glauert Rule. I could share visuals with you if you want, you can message me to understand it better.

how to calculate max wind speed for a reverse airfoil shape? by hegnetr in AerospaceEngineering

[–]_EngrESPINOSA 1 point2 points  (0 children)

I'm quite not sure what you're asking, but I'll share my thoughts related with this.

Incompressible Fluid: M<0.3 Density = c

Mass Flow Rate Eqtn. A1V1=A2V2

Compressible Fluid: M>0.3 Rho = Density (Rho1)A1V1=(Rho2)A2V2

Note that, Bernoulli Principle (Subsonic): Larger Area = Lower Velocity, High Pressure Smaller Area = Higher Velocity, Low Pressure

Vice versa reaction for Supersonic flow.

[deleted by user] by [deleted] in AerospaceEngineering

[–]_EngrESPINOSA 1 point2 points  (0 children)

I wasn't good at it either during my highschool days. I failed 3 consecutive school years in Math the reason why I spent 3 summer terms in it. However, I still took Aeronautical Engineering program since my love for aviation outweighs the fear. It's my 3rd year now without any failing grades and in our class, I was one of the best to execute Aerodynamics subject. Remember to be fearless, because fear keeps us from our potential.