Happiness

Sunday, July 16, 2023

Participants of the SDG program by Government of India

Friday, May 26, 2023

Civil aviation related bullet points

AE2100 engine developed for civil use

MTA is 14 to 18 ton medium transport aircraft.

RTA is on civilian side

RTA similar to C295

40-90 seats work for Indian high altitude airports

First we should develop SAF engines à then hybrid engine à then all electric

GE is focusing on hybrid engine directly

By 2023 all major engines in the world will be SAF compatible.

Civil electrical aircraft is unlikely

EVTOL electrical aircraft will come by 2025

Developing gas turbine engine core is difficult.

Better to develop engine around existing core.

Indian govt will not fund full program up to production

Business case for civil aircraft development?

o RAI Indonesia interested, also uses AE2100. N295 is similar to Dornier 228

o Upgrading Russian IL114 is heavy. Russian AN32 is military. AN132 is civil version of AN32 with PW127 engine

o Canada Bombardier is folding up

o PW127 has hot/high capability

o ATR42 has less runway roll. Modified specially for Delhi Kullu flight. Runway is short because of Beas river.

Clean sheet design of engine will take 7-8 years

125 Jaguar aircrafts are there in India

Gas turbine core IP not possible to transfer to India

Buy core engine for abroad. Do phase by phase indigenization of components.

IIP Dehradun setting up refinery for SAF in Mangalore

C929 is Chinese civil engine

PW127XT has single lever operation

GTF geared turbo fan giving lot of trouble for Pratt Whitney

A380 has Trent 900

A320 Neo one of the options got fully grounded due to oil seal leakage

737 MAX grounded for 1 year due to MCAS

Bombardier CRJ overshot time line

Embraer has stopped 90 seater work.

Saturday, May 20, 2023

Pulseview not opening, just opens, flashes and closes - Solution.

Actual driver software and user interface software I used for the Hantexk 6022BL is the OEM supplied one and not SIGROK/SAELAE. This is because both SIGROK/SAELAE install their own windows USB drivers using ZADIG and stop the oscilloscope functionality of the 6022BL.

So acquire the logic data with OEM supplied Hantek software and save the output as CSV file. Be sure you have installed Hantek software in non OS drive so that it can write the required setup file during closing of the software after each use.

Then open the saved CSV file in the pulseview software for decoding. It will open after installation first time. But after viewing the CSV file and closing pulseview, when you attempt to open it the second time, pulseview briefly opens, GUI window flashes and closes. This is because it is searching for the compatible USB device, which is not there in the PC. So, as solution, to start the pulse view to open the CSV file, go to the command window in the pulseview installation directory and use pulseview.exe -c command to start pulseview. This will make pulseview forget the past settings and make a fresh open. Good luck.

Tuesday, May 2, 2023

Interaction with an engine OEM

During interaction with an engine OEM on 2nd may 2023, I saw that the specifications given by engine OEM are at ISA+44F. So I mentally converted it into ISA+6 degrees, as 32 F is 0 degrees for us and any increment after 32F is roughly half of it in Celsius scale. So my question was if specification is at ISA+6 degrees, then the engine performance will be much lower when run at Indian condition, which is ISA + 25 degree Celsius, which is 40 degree Celsius. ISA is at 15 degree Celsius.

The reply given was that ISA is at 59F for US people, so I should convert the full value to Celsius. So, they should have specified that ISA is defined in Fahrenheit for US people and then I should have converted the full value (59F+44F = 103F = 39C) to Celsius, which is close to 40 degree Celsius that Indians use. Metric system is better than US system of units.

Sunday, April 30, 2023

Things he did

In tirupathi, on 23rd April , when in room waiting for the full day, he told "Enaku pasikuthu " for the first time. Not sure if he was bored or really hungry, but he understood the concept of calling for food unambiguosuly.
Yesterday on 30th May, when asked where his white hot wheels car was, he left the room, went to his toy basket, pretended to search and told "white car kaanom".
On Saturday, 29th May, when I came back from Vishakapatnam in flight, and entered room, he asked "Enga pona?", meaning how you went. I told I went by Bike. He replies "Dai, nee aeroplane pona.". Then "Appa, naa aeroplane ponum".

Saturday, April 8, 2023

#10 Helicopter: Engines with 20 HP

HP and PS are almost same
20HP engines are in Bullet Honda Hness. No weight information given.
Can make Aerolite 103 type aircraft with 2 of these engines
Or go and make electric motor that rotates at the same RPM as the propeller or main rotor and use that.
Rotax 447 40HP is 29 kg in weight

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