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S1581 Hawker Nimrod MkI

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Danny Fenton30/10/2018 16:08:10
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9077 forum posts
3928 photos

While everybody else is charging off building wings etc I am still looking at the fuselage.

I have had a TBS mini sound module arrive from Thomas benedini in Germany, I also oredered one of Thomas's new class D amplifiers. These amps generate very little heat and are very effificent. Rated at 40 watts it will drive an 8 ohm Visaton R10S speaker which will be mounted in the bottom of the fus, where the tank would reside. The other benefit of the amp is that it has a wide input voltage range, 3 - 6S LiPo. If you use the flight pack then you need an audio isolator between the pack and the amp.

fury88.jpg

I was at gaydon on Sunday and was really pleased to run into Roger one of the Fury builders, good to meet you

Whilst there I spotted some nifty carbon tube that was 6mm square in outside section, but with a 3mm round hole. I thought this might make a good wing joiner/allignment peg, if i decide to split the wings. It wasn't cheap but such is life. I bought a length of the tube and a length of solid 3mm rod.

fury89.jpg

I will look at the rear stringers next as they have to be fitted before the sheeting can be fitted.

Cheers

Danny

Jose L. G.30/10/2018 17:10:53
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179 forum posts
133 photos

Hi Danny.

I have similar carbon tube. In the end I didn`t use it because they weight a lot. Better option brass, aluminium or kevlar tube.

Cheers.

José L.

Danny Fenton30/10/2018 17:38:37
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9077 forum posts
3928 photos

Okay I lied, I decided to take a look at the removable centre section of the fus first.

F3 and F4 were offered up and checked for fit. This is a confusing plan to say the least. If you look at F3 up against F2 you would be forgiven for wondering what the heck is going on, they dont allign at all. The secret is in the sheeting, it doesn't always go over all the parts. once you accept this it becomes clearer. Note I said clearer NOT clear!

fury92.jpg

Anyway trust me me all will be well

I cut a length of 3/8 sq hardwood (Beech on the plan) to fit the gap and made sure they fitted into the square holes in F2 and F3, they were a snug fit, if you have to sand a slight taper on the ends of the 3/8 square hardwood then that is better than the ply parts.

Two things you have to be mindful of is not sticking the formers F3 and F4 to F2 and F5 which are already afixed to the fuselage! The other thing to watch is that glue in the joints between F2, F5 and the fuselage tops isn't stopping F2 and F3 sitting flush. I had to radius F3 and F4 a little to allow for the glue joint beneath.

I avoided gluing the bulkheads by only applying a bead to the inside edges, but if you are unsure just lay a small patch of solarfilm backing between the bulkheads. This will form a glue barrier.

fury90.jpg

I then added the side pieces which I cut from 1/8 using my stripper set to 15mm wide. (firgive me mixing my measurements, but 1/8 still means more to me than 3mm) And also fitted the top section from 1/8 by 1/2.

fury93.jpg

Okay i will leave that lot to dry while I strip some 3/32 balsa for stringers.

Cheers

Danny

Danny Fenton30/10/2018 17:46:31
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9077 forum posts
3928 photos

Having just looked at that picture there is a gotcha staring me in the face.... I am annoyed because I spotted it beforehand then promptly forgot. You need to drill the holes for the captives before you block access with that upper strip. Not to worry it is easily sorted, I will drill through the balsa AND the hardwood square sections. the balsa being there will actually help to ensure drilling vertically.

Cheers

Danny

Martin Fane30/10/2018 18:07:57
284 forum posts
289 photos

Hi Danny

Nice progress, I had the same pondering exercise on the sheeting for the removable panel sad

Is your CL bellcrank going to allow the plan method of retaining using the 2 bolts / captive nuts ?

As a matter of interest who supplies the carbon tube and rod ?

cheers

Martin

Danny Fenton30/10/2018 18:33:43
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9077 forum posts
3928 photos

Hi Martin the removable panel is fine but F6??? I am struggling with that one.

The square section tubing was from Bucks Composites. I like it because you dont have to pack out tubing with epoxy to fit between the spars. But the jury is still out on splitting the wong panels.

Yes the centre section can still be removed by simply pivoting the bellcrank to clear the screws, have to remember to make sure I have allowed enough travel though.

Cheers

Danny

Martian30/10/2018 20:13:02
2171 forum posts
1058 photos

Hi Danny super job so far I,ve yet to post my progress, just a quick question though I intend to go the tail skid way and am thinking of making it sprung which got me looking at your F11 with holes in it are these for your tail wheel or the holes made for the tail skid wire and how are you going to fit the tail wheel now that F11 is fitted and glued in place

Danny Fenton30/10/2018 20:34:54
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9077 forum posts
3928 photos

Hi Martian, thanks

F11 has holes lasered in it straight from the plan. They are to allow the piano wire to be "stitched" to it.

It can still be stitched even though in place, though you are right I probably ought to look at it before the stringers are in place, thanks

I did consider making my skid sprung, it should be fairly simple to do, just watch the weight

Cheers

Danny

Martian30/10/2018 20:56:29
2171 forum posts
1058 photos

Don t i get a point 😎

Danny Fenton30/10/2018 21:23:42
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9077 forum posts
3928 photos

If you can offer me some advice on what to do with these upper bloomin formers you can have two... pulling my hair out

Danny Fenton30/10/2018 22:10:44
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9077 forum posts
3928 photos

Okay, I tried in vain to scale the Westburg fuselage profiles to see what is going on around F6 and for some reason my PC has stopped printing within tile-print, so that plan was scuppered.

I cut out a new F6 in 1/8 and temporarily held it in place while I used a length of balsa to plot the shape, assuming the curve remained similar over the other formers and the sides would blend into F7.

this is the result:

fury94.jpg

I am not sure how I will create this but three laminations of 1/16 sounds fun

The old F6 is shown resting aginst the back of the new F6

Cheers

Danny

Richard Mallam.31/10/2018 13:57:56
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53 forum posts
7 photos

Hi Danny,

On the 18th, you posted a picture of a bellcrank beneath the 3/8th sq beech bearer and between F3 and F4. Dumb question - what's it for? Also, where are you planning to place your rudder and elevators servos?

Thanks, Richard

Danny Fenton31/10/2018 14:10:48
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9077 forum posts
3928 photos

Hi Richard,

The last couple of models I have made dual role, in that they can be flown R/C or C/L by simply moving an elevator servo linkage to the Bellcrank.

The rudder and elevator servos will go behind the firewall, as far forward as I can get them. Pushrod routing being the limiting factor.

The Chipmunk was quite succesful as a control line model

British Nationals 2017.jpg

Thanks again Chris Bott, awesome piccy

Cheers

Danny

Danny Fenton31/10/2018 17:39:19
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9077 forum posts
3928 photos

I have asked Richard D to see if he can find any pics from his build which may give us a clue to the final shape of F6.

I notice Jose has sheeted his fuselage, so we will see how his looks I guess

Cheers

Danny

Martian31/10/2018 17:49:47
2171 forum posts
1058 photos

As far as I can see the shape of f6 is wrong but that f5 and f6 should be basically the same at no point does there appear to be a flat section on that area of the cockpit .i,m pretty certain i will put in f5 and f7 first then have another look . Your thoughts on this wise master

Martian31/10/2018 18:04:24
2171 forum posts
1058 photos

I've just studied Jose,s post and it makes sense now . F6 does have a flat area otherwise the pi!ots view would be restricted

Danny Fenton31/10/2018 18:12:15
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9077 forum posts
3928 photos

I don't think so.....

hf 45.jpg

The wooden blocks that the windscreen sits on creates the illusion of a flat area. The whole cowl flows, with the current shape of F6 it does not. With my new version it does, but I want to wait to see what Richard says before i comit to glue.

Cheers

Danny

Martian31/10/2018 18:58:37
2171 forum posts
1058 photos

I now agree Danny ,I have downloaded drawings from blueprints . Com it includes former shapes and at position ff which is f6 on the plan it is founded .I will upload and share as soon as possible later ,it looks like my earlier supposition is correct anyway see what you think later

Martian31/10/2018 19:46:23
2171 forum posts
1058 photos

to pour fuel on the fire we now have Jose,s drawing and blueprint one I have posted that on the main Fury thread

Danny Fenton01/11/2018 00:10:40
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9077 forum posts
3928 photos

Richard has shared his pics with me and he has built his with a flat topped F6. I guess Richard used the Traplet parts. His doesn't look wrong.

However careful study of the pics that we took at Duxford on Wednesday of the Fury I and Nimrod II showed no flat section. When we look at the Peter Westburg drawings of station 53.25 we also do not see a flat section.

station 23.25 53.25.jpg

I think the wooden plinth under the windscreen has been misinterpreted as to mean the combing is flat.

Dennis must have used one of the "suspect" three views as the basis for his plan.

Cheers

Danny

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