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Search: Posts Made By: Machdiamond
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22nd Aug 2019, 13:59
Replies: 19
Views: 7,138
Posted By Machdiamond

The article is poorly written and illustrated by...

The article is poorly written and illustrated by the wrong aircraft.

They have made very clear at the press gathering yesterday that they have no intention to resume production of the jet variant...
Forum: Canada
13th Aug 2019, 13:06
Replies: 40
Views: 11,190
Posted By Machdiamond

Something like this maybe? (ELTA ELI-3360)...

Something like this maybe? (ELTA ELI-3360)...
7th Aug 2019, 14:20
Replies: 146
Views: 77,034
Posted By Machdiamond

What percentage of Cape Air routes are under 100...

What percentage of Cape Air routes are under 100 miles? How do you think they will like near zero maintenance cost on the propulsion system and cheap electric recharge at a small fraction of the fuel...
7th Aug 2019, 03:05
Replies: 146
Views: 77,034
Posted By Machdiamond

For short haul on 6-9 passenger all-electric...

For short haul on 6-9 passenger all-electric aircraft is about a factor of five for small commuters, ten at most (500 kWh to 1 MWh). This is about the same level of electric truck charging...
7th Aug 2019, 01:48
Replies: 146
Views: 77,034
Posted By Machdiamond

It might be a challenge for the electrification...

It might be a challenge for the electrification of an existing design but not such a big deal if you give up some payload as pattern_is_full pointed out.

For a clean sheet design, the empty weight...
7th Aug 2019, 01:40
Replies: 146
Views: 77,034
Posted By Machdiamond

You omit the fact that electric aircraft is only...

You omit the fact that electric aircraft is only viable with (and serious electric projects only claim) really short range routes, like inter island below 100 nm. In these conditions, relative to...
7th Aug 2019, 01:33
Replies: 146
Views: 77,034
Posted By Machdiamond

You are a bit off and misunderstood the point...

You are a bit off and misunderstood the point Pattern_is_full was making. The MagniX - Harbour Air retrofit of the Beaver with electric power is pretty much based on the PT6 STC and 6000 lb increased...
7th Aug 2019, 01:24
Replies: 146
Views: 77,034
Posted By Machdiamond

With current battery technology (Porsche 350 kW...

With current battery technology (Porsche 350 kW fast chargers and Tesla SuperChargers), about 30 minutes at the gate. In five years from now, about 20 minutes which is typical short haul turnaround...
1st Aug 2019, 04:34
Replies: 146
Views: 77,034
Posted By Machdiamond

Hybrid aircraft have no technical connection...

Hybrid aircraft have no technical connection whatsoever with hybrid cars.

Hybrid cars are mostly efficient in city driving because they can get some of the energy back in when braking...
27th Jul 2019, 15:27
Replies: 146
Views: 77,034
Posted By Machdiamond

Q1 revenue was 4.5 billion and Q2 was 6.4...

Q1 revenue was 4.5 billion and Q2 was 6.4 billion, I don't know were you are taking that billion dollars down. More crucially, free cash flow was positive 614 million in Q2 versus negative 920...
12th Jul 2019, 13:58
Replies: 23
Views: 6,945
Posted By Machdiamond

Unpressurized at 10000 ft, approximately 1500 nm....

Unpressurized at 10000 ft, approximately 1500 nm.



You have to correct for efficiencies. An electric motor and inverter is about 90% while a turboprop is about 40-45% (actually a lot less if...
10th Jul 2019, 19:29
Replies: 23
Views: 6,945
Posted By Machdiamond

This article has some data...

This article has some data https://www.ainonline.com/aviation-news/air-transport/2019-06-19/eviations-alice-fly-year

Let's see, 14000 lb maximum takeoff weight minus 8200 lb of batteries minus...
13th Apr 2019, 13:41
Replies: 146
Views: 77,034
Posted By Machdiamond

This explains why electric cars have been...

This explains why electric cars have been outselling gas powered cars in Norway for the first time last month (first country in the world to do so). It is a well known fact that Norwegians are...
3rd Apr 2019, 23:00
Replies: 16
Views: 2,251
Posted By Machdiamond

Well, it does. Here is a charge from 50% (the 20...

Well, it does. Here is a charge from 50% (the 20 minutes VFR reserve) to 100% in less than an hour (53 minutes mark to 1h48min mark) : Tesla Model 3 LR Supercharging from 0 to 100%

You can believe...
3rd Apr 2019, 20:30
Replies: 16
Views: 2,251
Posted By Machdiamond

Good point on the 80% to 100% charge. The last...

Good point on the 80% to 100% charge. The last 10% can take another hour. So let's say charge to 95% in an hour instead of 80% in 30 minutes.

Real life data (for example from this heavy fleet user...
3rd Apr 2019, 15:24
Replies: 16
Views: 2,251
Posted By Machdiamond

Most Beaver flights at Harbour Air are 15-30...

Most Beaver flights at Harbour Air are 15-30 minutes long.

Maybe Harbour Air could obtain a waiver for the 30 minutes reserve requirement down to 20 min like helicopters, especially considering...
Forum: Tech Log
2nd Apr 2019, 11:58
Replies: 11
Views: 1,977
Posted By Machdiamond

I checked the numbers you posted above with an...

I checked the numbers you posted above with an older non-NextGen Q400 AOM and they are all exactly the same.
Forum: Tech Log
30th Mar 2019, 19:11
Replies: 11
Views: 1,977
Posted By Machdiamond

Bombardier used to have a Q400 Fuel Efficiency...

Bombardier used to have a Q400 Fuel Efficiency Manual pdf available for download on their web site for awhile, there are still copies of that pdf floating around if you google these title words (PM...
8th Mar 2019, 15:14
Replies: 49
Views: 37,607
Posted By Machdiamond

I don't see any evidence that this is fake (CGI...

I don't see any evidence that this is fake (CGI and CFD background here with analysis of flow patterns of aircraft in ground effect).
This is a cellphone video with very high compression, but to me...
Forum: Canada
3rd Apr 2018, 16:18
Replies: 22
Views: 4,525
Posted By Machdiamond

If you file in the US you would still need to...

If you file in the US you would still need to report all income sources in Canada as well. Double taxation avoidance only entitles you to deduct whatever you already paid in the US, not cherry pick...
28th Mar 2018, 22:05
Replies: 31
Views: 24,212
Posted By Machdiamond

According to the newspaper linked above, the...

According to the newspaper linked above, the tyres appear undamaged. Passengers reported the event as taking place as the gear was lowered.

I have done some CFD/6DOF trajectory analysis of gear...
28th Mar 2018, 18:10
Replies: 31
Views: 24,212
Posted By Machdiamond

Was wondering the same thing. Here is a theory:...

Was wondering the same thing. Here is a theory: if the link between the main gear and the door fails, the door will hinge full up. Then at failure point it may have gained enough momentum to pretty...
Forum: French Forum
17th Dec 2016, 19:24
Replies: 7
Views: 5,177
Posted By Machdiamond

En effet j'ai trouvé le document d'Air France en...

En effet j'ai trouvé le document d'Air France en question et je suis d'accord. Je ne travaille que rarement en français et je n'avais pas encore vu ce terme, intéressant.

--Luc
Forum: French Forum
16th Dec 2016, 18:00
Replies: 7
Views: 5,177
Posted By Machdiamond

Si c'est suite à une panne moteur, ce serait...

Si c'est suite à une panne moteur, ce serait "drift down altitude".

--Luc
30th Oct 2016, 15:18
Replies: 204
Views: 174,695
Posted By Machdiamond

Forgetting to shut the engines down immediately...

Forgetting to shut the engines down immediately after an evacuation command, with unusable slides and/or passengers blown the ground, seems to become a common occurrence.

Or maybe it is placed too...
Showing results 1 to 25 of 98
 


 
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