dark light

Merlin Halifax

Please can anyone give me the actual diameter (or even the circumference) of the Merlin Halifax Rotol spinner at the backplate. Or failing that has anyone a drawing from an AP showing the complete installation (Gallay rads prefered)
for either the inner or outer engines.

I also require the max width of the main nacelle fairing.

If anyone can help I do need this info quite quickly please but on no account must it come from model/magazine plans unless it’s from a tech publication (ie Flight).

Cheers

John

Member for:

19 years 1 month

Posts:

594

Send private message

By: anneorac - 8th March 2012 at 13:20

Ignore last message. I’ve just measured the diameter of a Halifax engine fairing and that comes to 26″.

Anne

Member for:

19 years 1 month

Posts:

594

Send private message

By: anneorac - 8th March 2012 at 13:20

Ignore last message. I’ve just measured the diameter of a Halifax engine fairing and that comes to 26″.

Anne

Member for:

19 years 1 month

Posts:

594

Send private message

By: anneorac - 8th March 2012 at 13:11

The spinner use on the three bladed, Merlin engined Halifaxes was the ES13 which was same spinner used on later Whitleys.

A quick flick of the tape gives a measurement of about 24″ for a Whitley spinner, however it’s so rusty I can’t tell you if I’ve just measured an ES1, Es10 or an ES13 all of which were used on the Whitley.

24/72 = 1/3″ if you’re working on a certain Matchbox release.

Anne

Member for:

19 years 1 month

Posts:

594

Send private message

By: anneorac - 8th March 2012 at 13:11

The spinner use on the three bladed, Merlin engined Halifaxes was the ES13 which was same spinner used on later Whitleys.

A quick flick of the tape gives a measurement of about 24″ for a Whitley spinner, however it’s so rusty I can’t tell you if I’ve just measured an ES1, Es10 or an ES13 all of which were used on the Whitley.

24/72 = 1/3″ if you’re working on a certain Matchbox release.

Anne

Member for:

19 years 1 month

Posts:

2,313

Send private message

By: John Aeroclub - 8th March 2012 at 12:29

Cees

Thank you for your answer. Whilst I take your point about the use on the Halifax I’m sure it will turn out to be a Rotol stock item and I feel sure that this was also used on the Wellington II with the Gallay radiator cowl. I know the dimensions now and I’m “sitting on them” until I have my patterns finished.

Regards

John

Member for:

19 years 1 month

Posts:

2,313

Send private message

By: John Aeroclub - 8th March 2012 at 12:29

Cees

Thank you for your answer. Whilst I take your point about the use on the Halifax I’m sure it will turn out to be a Rotol stock item and I feel sure that this was also used on the Wellington II with the Gallay radiator cowl. I know the dimensions now and I’m “sitting on them” until I have my patterns finished.

Regards

John

Member for:

19 years 1 month

Posts:

1,686

Send private message

By: CeBro - 8th March 2012 at 06:38

John,

I think that the Merlin Halifax spinner was unique to the type. I don’t think any other type in the RAF at the time used the same. There was a Hurricane flying (HAC’s?) that had a spinner that had the same blunt tip.

Hope this helps,

Cees

Member for:

19 years 1 month

Posts:

1,686

Send private message

By: CeBro - 8th March 2012 at 06:38

John,

I think that the Merlin Halifax spinner was unique to the type. I don’t think any other type in the RAF at the time used the same. There was a Hurricane flying (HAC’s?) that had a spinner that had the same blunt tip.

Hope this helps,

Cees

Member for:

19 years 1 month

Posts:

2,313

Send private message

By: John Aeroclub - 7th March 2012 at 14:16

I’ve answered my own question by going to Hendon and doing my own survey. I am still interested to learn if this spinner type was used by other a/c (ie Wellington II).

John

Member for:

19 years 1 month

Posts:

2,313

Send private message

By: John Aeroclub - 7th March 2012 at 14:16

I’ve answered my own question by going to Hendon and doing my own survey. I am still interested to learn if this spinner type was used by other a/c (ie Wellington II).

John

Member for:

19 years 1 month

Posts:

2,313

Send private message

By: John Aeroclub - 28th February 2012 at 12:50

Jeepman, that was my first suggestion 🙂

John

Member for:

19 years 1 month

Posts:

1,647

Send private message

By: jeepman - 27th February 2012 at 23:43

I have spoken with Ray and he had difficulty measuring the spinner as he had only a tape measure so 24″ is the nearest he could gauge.

John

running the tape around the circumference of the spinner backplate and then dividing by 3.142 (pi) would have given the diameter…..

Member for:

19 years 1 month

Posts:

2,313

Send private message

By: John Aeroclub - 27th February 2012 at 23:32

I have spoken with Ray and he had difficulty measuring the spinner as he had only a tape measure so 24″ is the nearest he could gauge.

John

He did the measure the Hendon machine. He gives other measurements as well in the article but I guess you can get them from him. (Max width of the engine nacelles 48 inches.)

Member for:

19 years 1 month

Posts:

9,672

Send private message

By: pagen01 - 27th February 2012 at 13:53

Please can anyone give me the actual diameter (or even the circumference) of the Merlin Halifax Rotol spinner at the backplate…

I also require the max width of the main nacelle fairing.

I can’t wait for this if it comes to fruition.:)

Member for:

19 years 1 month

Posts:

467

Send private message

By: knifeedgeturn - 27th February 2012 at 13:38

Sorry, I thought if you had the dimensions of the internals you could plot the shape and size of the spinner, using the above diagram as a reference.

Member for:

19 years 1 month

Posts:

649

Send private message

By: antoni - 27th February 2012 at 13:24

I know Ray so he might have measured the Hendon machine.

He did the measure the Hendon machine. He gives other measurements as well in the article but I guess you can get them from him. (Max width of the engine nacelles 48 inches.)

Member for:

19 years 1 month

Posts:

1,462

Send private message

By: Malcolm McKay - 27th February 2012 at 12:58

I suspose that you have already read Ray Ball’s article in the Feb edition of SAMI? He gives the spinner size as 24 inches.

I see Freightdog Models already have a correction set on sale.

As John has pointed out the Freightdog parts are simply cosmetic and are only intended to improve the look not to be correct, they don’t address the real problem which is the completely oversized nacelles. John is seeking to provide correct sized parts.

Member for:

19 years 1 month

Posts:

2,313

Send private message

By: John Aeroclub - 27th February 2012 at 12:49

Thanks for this reply. No I haven’t seen Ray’s article as I don’t take SAMI these days but the information is interesting as 24″/25″ was my first rough calculation. I know Ray so he might have measured the Hendon machine.

The Freightdog set doesn’t actually address the real issues but is largely cosmetic IMO it still has over large spinners and intakes to suit the very innaccurate Revell nacelles

Thank you KET but it’s the absolute dia of the spinner I need preferably in it’s simplest form.

Regards

John

I suspose that you have already read Ray Ball’s article in the Feb edition of SAMI? He gives the spinner size as 24 inches.

I see Freightdog Models already have a correction set on sale.

Member for:

19 years 1 month

Posts:

467

Send private message

By: knifeedgeturn - 27th February 2012 at 11:33

Found the forward locating disc, very bent, but looks to be 12″ dia, but I would think there is a rubber type lip that goes around it ,increasing the diameter; this hub is a four blade type with wooden blades and by comparison is much larger than a four blade spitfire, with a very large constant speed unit.

I would think that the size of the spinner would (in this case) be governed by the size of the hub, more than the expected frontal area of the engine.

Tony Hodge, is I believe the name of the chap, that bought it from me, and he was in contact with Dowty/Rotol, and so, (as my original post suggested) he might have additional information re the spinner.

Member for:

19 years 1 month

Posts:

649

Send private message

By: antoni - 27th February 2012 at 11:28

I suspose that you have already read Ray Ball’s article in the Feb edition of SAMI? He gives the spinner size as 24 inches.

I see Freightdog Models already have a correction set on sale.

1 2
Sign in to post a reply