Presumably it is OK to have the replacement engine completely concealed within the vehicle so long as some panels are removable for viewing?

A model car with an opening bonnet for example.

Quote from: zenrat on June 05, 2023, 05:04:06 AMPresumably it is OK to have the replacement engine completely concealed within the vehicle so long as some panels are removable for viewing?
A model car with an opening bonnet for example.

As long as it visible it's OK.
So open bonnet is fine

Tomz

Quote from: TomZ on June 05, 2023, 04:46:01 AM3) The moderators will not get involved in the discussion on date formats, however "interesting" that discussion appears to be 

All I'm going to say re the date format used is that I was taught, and have used for my whole life, either 1st March 1952 or 01/03/1952 , therefore as long as I'm typing these rules etc that's the way they will stay. 

I've used the above date as an example because it's my birthdate. 

How about changing the form of propulsion from one which actually DOES propel the item, to one that isn't there at all? In an aircraft's case that'd end up as a glider.

I have 'form' doing this of course. 

You cannot view this attachment.

So, going from a chemical-reaction energy engine to a potential energy->kinetic energy transition drive utilising gravitational effects as an acceleration device.

Exactly. 

Quote from: TomZ on June 05, 2023, 04:46:01 AM2) We agree that the "RE" in re-engine means that the propulsion method is changed to a new one. So just adding an auxiliary engine will not be allowed. The new propulsion method should be the only propulsion system.

This rules out mixed propulsion however.  So converting a twin engined fighter into something like a Saunders Roe SR.177 would be out. So where a vehicle is multi engined, is it possible to re-engine some but not all of them, when the propulsion is supplementary rather than auxiliary

Quote from: Mossie on June 05, 2023, 12:36:56 PM

Quote from: TomZ on June 05, 2023, 04:46:01 AM2) We agree that the "RE" in re-engine means that the propulsion method is changed to a new one. So just adding an auxiliary engine will not be allowed. The new propulsion method should be the only propulsion system.

This rules out mixed propulsion however.  So converting a twin engined fighter into something like a Saunders Roe SR.177 would be out. So where a vehicle is multi engined, is it possible to re-engine some but not all of them, when the propulsion is supplementary rather than auxiliary

To keep things simple Mossie mate if your plane is a twin and powered by say 2 radials then it's fine to remove those and swap em with 2 say Griffons..what ever the swap is..  it's replaced with 2 forms of propulsion of the same type..no supplementary engines of a different type.
Loose both piston engines and replace with 2 jets ..yes
Replace one of the 2 piston engines with a jet ..nope.

Okay. What's the reasoning?

The reason is simplicity...if you have 2 forms of propulsion which is the primary one.
The whole idea to re- engine is to re engine it..not to just add to it ...ie ..replacing its original power plant with a entirely new and different one.

So this is out then?

Quote from: zenrat on June 06, 2023, 04:32:08 AMSo this is out then?

Yes.

Please give me a signal if you are ready , and the build will start ... I am in , shure     .

My absolute favourite in the collection was the ,,that can't work" theme ore similar,  would have given us some funny things ...


But re - engine is cool .    Daily business 

Quote from: TomZ on June 06, 2023, 04:54:55 AM

Quote from: zenrat on June 06, 2023, 04:32:08 AMSo this is out then?

Yes.

Would it be allowed if you replaced the remaining piston engine with a different one (an Allison V-3420 for example) so both engines had been replaced?

Quote from: zenrat on June 07, 2023, 05:07:53 AM

Quote from: TomZ on June 06, 2023, 04:54:55 AM

Quote from: zenrat on June 06, 2023, 04:32:08 AMSo this is out then?

Yes.

Would it be allowed if you replaced the remaining piston engine with a different one (an Allison V-3420 for example) so both engines had been replaced?

Yes, that would be allowed as long as the change from the cyclone to the Allison is visible recognizable.
You could go from two cyclones to one Allison and one nuclear warp engine if you like......


TomZ