Timeline for How much thrust is gained from placing a propeller in a duct?
Current License: CC BY-SA 3.0
26 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 2, 2021 at 12:27 | answer | added | cnd | timeline score: 1 | |
| S May 24, 2017 at 4:57 | history | bounty ended | CommunityBot | ||
| S May 24, 2017 at 4:57 | history | notice removed | user14897 | ||
| May 22, 2017 at 23:54 | comment | added | mongo | A well designed duct...for what? What is the application, what are the bounding parameters? I posted an answer, and while it addresses thrust efficiency issues it does not address RPM. RPM is influenced by a number of parameters, and there is no definition as to what the assumptions might be. | |
| May 22, 2017 at 23:51 | answer | added | mongo | timeline score: 4 | |
| May 22, 2017 at 18:24 | history | edited | user14897 | CC BY-SA 3.0 |
added 201 characters in body
|
| May 22, 2017 at 1:12 | comment | added | mongo | This question is difficult to accurately answer. For example, are you optimizing the ducted prop, or is it the same airfoil used in the unducted version? Also, RPM is normally a function of the prop airfoil, and other things, so that implies that you are considering the same airfoil, whether ducted or not. Then if I can pick the airfoil, I can change the RPM behavior, whether ducted or not. Or are you simply looking for a rule of thumb? What is the relative wind of the prop? And so on. Tell us more, and you will get more info. | |
| May 20, 2017 at 14:10 | history | edited | user14897 | CC BY-SA 3.0 |
added 21 characters in body
|
| May 19, 2017 at 11:48 | history | edited | user14897 | CC BY-SA 3.0 |
added 93 characters in body
|
| May 19, 2017 at 7:46 | comment | added | Gianni Alessandro | I do not understand your question. You want to know which is the power of a propeller in a wind tunnel that completely encloses it or just of a propeller mounted on a plane with a structure that encloses the prop? | |
| May 18, 2017 at 22:14 | history | edited | kevin |
edited tags
|
|
| May 18, 2017 at 21:52 | history | edited | user14897 | CC BY-SA 3.0 |
either or
|
| May 18, 2017 at 17:07 | history | tweeted | twitter.com/StackAviation/status/865252623737401344 | ||
| S May 18, 2017 at 16:47 | history | bounty started | CommunityBot | ||
| S May 18, 2017 at 16:47 | history | notice added | user14897 | Draw attention | |
| May 18, 2017 at 16:46 | history | edited | user14897 | CC BY-SA 3.0 |
deleted 223 characters in body; edited tags; edited title
|
| May 18, 2017 at 16:21 | history | edited | Pondlife | CC BY-SA 3.0 |
Wording
|
| May 14, 2017 at 20:36 | comment | added | mins | @TomMcW: I've reverted to the OP's version. BTW I haven't seen the tag 'helicopter'. | |
| May 14, 2017 at 20:30 | history | rollback | mins |
Rollback to Revision 2
|
|
| May 13, 2017 at 20:32 | comment | added | TomMcW | @whiteknight can you confirm if you are referring to thrust, not lift? (well technically the thrust is the "lift" of the prop blades, but thrust is less confusing) | |
| May 13, 2017 at 20:29 | comment | added | TomMcW | @mins I don't think he does mean "wing lift." How would a ducted prop produce any major effect on the wings. When he says "lift" I believe he is referring to thrust. Which makes it a dupe of the other question except that it's asking for some more specific quantities. | |
| May 13, 2017 at 16:27 | history | edited | mins | CC BY-SA 3.0 |
Simplified title and body, assuming by lift you mean wing lift, not propeller thrust.
|
| May 13, 2017 at 14:38 | history | edited | White Knight | CC BY-SA 3.0 |
edited title
|
| May 13, 2017 at 14:36 | comment | added | Ralph J♦ | That "duplicate" question basically says, "maybe even twice" the thrust, which is more an intro to, rather than an answer to, this question. | |
| May 13, 2017 at 12:54 | review | Close votes | |||
| May 13, 2017 at 16:34 | |||||
| May 13, 2017 at 11:34 | history | asked | White Knight | CC BY-SA 3.0 |