Search Results
| Search type | Search syntax |
|---|---|
| Tags | [tag] |
| Exact | "words here" |
| Author |
user:1234 user:me (yours) |
| Score |
score:3 (3+) score:0 (none) |
| Answers |
answers:3 (3+) answers:0 (none) isaccepted:yes hasaccepted:no inquestion:1234 |
| Views | views:250 |
| Code | code:"if (foo != bar)" |
| Sections |
title:apples body:"apples oranges" |
| URL | url:"*.example.com" |
| Saves | in:saves |
| Status |
closed:yes duplicate:no migrated:no wiki:no |
| Types |
is:question is:answer |
| Exclude |
-[tag] -apples |
| For more details on advanced search visit our help page | |
Results tagged with engine-design
Search options not deleted
user 42636
Questions about the process and principles used when designing aircraft engines. Use "jet-engine" and "piston-engine" tags to specify a certain type of engine.
44
votes
Accepted
Do turbofan engine cowlings dilate during spool-up?
Now that's an interesting phenomenon! I do not believe that this is a case of an illusion of any sort, or the engine dilating. What the video probably shows, is the engine slightly turning towards the …
- 30.5k
2
votes
Why don't turbofan engines have shrouds affixed to the fan blades?
To add to the fine answers:
The rotating shroud woud add extra mass, as the duct would still have to run past it. This mass would also be rotating at high speed, creating substantial gyroscopic forces …
- 30.5k
1
vote
Do contra-rotating propellers have the same RPM?
No, not all contra-rotating propellers turn at the same rpm.
Take two russian (very famous) examples, the Tupolev TU-95 Bear, and Antonov AN-22 Cock (go figure...). Both use versions of NK-12 turbopr …
- 30.5k
3
votes
Accepted
Confusing justification for new engines for Bomber B
As a general take on the subject: the ratio of manufacturing time vs. size mostly depends on what is the bottleneck in production.
For a piston engine, or most mechanical devices of comparable complex …
- 30.5k
2
votes
Are there aircraft with multiple inlets for a turbojet engine?
Quite a few planes fit your description of multiple (two) inlets for a (single) turbojet. The latest would be the F-35, other (as mentioned in the comments are numerous: JAS gripen, most Mirages, BAe …
- 30.5k
27
votes
Why do new engines have a case with a triangular tiling pattern?
This is simply a way to achieve required rigidity/strength and vibration dampening with less material than in a solid, even thickness design.
Varying the weave pattern gives a relatively easy and a v …
- 30.5k
16
votes
2
answers
5k
views
Why don't NK-12 powered contra-rotating propellers turn in equal rpm?
The Kuznetsov NK-12 is a Soviet turboprop engine of the 1950s, designed by the Kuznetsov design bureau. The NK-12 drives two large four-bladed contra-rotating propellers, 5.6 m (18 ft) diameter (NK …
- 30.5k
3
votes
Can liquid hydrogen be pumped directly into a jet engine without a heat exchanger? Is it bur...
Hydrogen has to be in gaseous state to burn. The boiling point of hydrogen is ~20 kelvins, while oxygen boils at about 90 kelvins and freezes to solid at ~54 kelvins. It is therefore impossible to mix …
- 30.5k