Tiger Ausf E “F01” Gruppe Fehrmann

Forum for discussion relating to Tiger 1, Mid, Early, Late Production and Sturmtiger
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Adrian Harris
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Re: Tiger Ausf E “F01” Gruppe Fehrmann

Post by Adrian Harris » Mon May 25, 2020 11:45 am

I'd certainly like to see an engine build thread please :-)

Adrian.
Contact me at sales@armortekaddict.uk for details of my smoker fan control module and other electronic gadgetry

Vince Cutajar
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Re: Tiger Ausf E “F01” Gruppe Fehrmann

Post by Vince Cutajar » Mon May 25, 2020 11:48 am

Me too. If you have the time.

Vince

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AlastairCooke
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Re: Tiger Ausf E “F01” Gruppe Fehrmann

Post by AlastairCooke » Mon Jun 08, 2020 12:21 pm

Hi All,
Update: 8 Jun 20
Not much to report on this thread as I spent much of the last couple of weeks getting the basic engine completed (see HL230 engine build thread). However, the first item was a dry fit of my custom-made idler adjustment capture plates.
20200524_155548-doc.jpg
Then a test fit of a design of the front mounting plate for the engine, this was printed by Shapeways as I wanted it to be tough and durable.
20200606_171637-doc.jpg
20200606_171653-doc.jpg
With this installed I could position the engine carcass and think about how to secure the firewall at the bottom.
20200606_161520-doc.jpg
That’s all for now.
Alastair

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AlastairCooke
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Re: Tiger Ausf E “F01” Gruppe Fehrmann

Post by AlastairCooke » Fri Jun 19, 2020 12:44 pm

Hi All,
Update 19 Jun 20
I designed a replacement tow hitch and also got it printed by Shapeways in Nylon 12 (Versatile Plastic) as I wanted it to be tough and durable. This will be the material of choice for any non-structural external detail. If we get into structural parts (perhaps with the new resilient wheel hubs that are designed for the KT and need to change for the Tiger 1) then MJF Nylon 12 possibly with glass beads may be chosen. Anyway the Versatile Plastic parts are covered in Mr Surface 1000 to act as an primer and filler since the plastic is porous.
20200606_115913-doc.jpg
20200606_155326-doc.jpg
revised tow hitch
The next job was to shape the internal floor that is being ‘constructed’ from the surplus belly plate:
20200611_192722-doc.jpg
Note that the plate has been cut to allow its removal without disturbing the drive motors.
20200617_185046-doc.jpg
Here we see holes drilled so that plate can be secured to the front ‘stiffening’ bar. I will probably use cap screws here for ease of access for removal. I am trying to design all the internal features so that it is possible to access the torsion bars without disturbing the basic hull. This idea is demonstrated with the firewall:
The top is screwed to the radiator inlet grill supports...
20200607_173840-doc.jpg
...and attached to the internal floor using some of the roof support brackets that are now surplus:
20200617_185057-doc.jpg
front view
20200617_185113-doc.jpg
rear view
The plan (at the moment) will be to attach the engine front support plate to the firewall at the top only so that if required the firewall can pulled out vertically and the internal floor removed with disturbing the engine. Likewise, using a scheme yet to be devised :? , I plan to be able to remove the engine without disturbing the firewall or any items attached to the belly plate.
Because of all this design work and the desire to minimise any requirement to drill/tap holes in situ I am still some way off etch prime and red oxide priming the hull. In addition, I am only partially successful at thinking 10 steps ahead :? . So far there have been only a few “aw shucks” moments :oops: . I will show how close my proto-typical front roof support is to the drive motors when it is completed... the fit is very tight! :)

I hope this amount of detail is of interest?

Alastair

Christoffer Ahlfors
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Re: Tiger Ausf E “F01” Gruppe Fehrmann

Post by Christoffer Ahlfors » Fri Jun 19, 2020 10:01 pm

You bet! :D
Klotzen, nicht kleckern (Guderian on panzer tactics, but the way I interpret it - it applies to a great many things in life)

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Stephen White
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Re: Tiger Ausf E “F01” Gruppe Fehrmann

Post by Stephen White » Fri Jun 26, 2020 7:39 pm

Just when you think there are no more photos of FO1 out there, another one pops up. This one was posted on the 3RTR Facebook page today. 3 RTR knocked out FO1 on the Aller Crossing recounted elsewhere. (Photo via Adam Hermitage)

105989704_10158685343183385_6321025544048711197_n.jpg
105989704_10158685343183385_6321025544048711197_n.jpg (53.63 KiB) Viewed 404 times

There are six images in the Tank Museum Archive:

FO1 Original Images Tank Museum.jpg

And I was aware of three others, now this one makes four:

FO1 Original Images Other.jpg

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Re: Tiger Ausf E “F01” Gruppe Fehrmann

Post by AlastairCooke » Mon Jun 29, 2020 11:54 am

Hi Stephen
Many thanks for the 'heads up'. Looks like this image was taken a little later when it had been pushed off the track? The available views now give the full driver's side... pity no one stood the other side! I suspect that was too difficult given the trees, the ground conditions and 'natural' view for passers by.

Alastair

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Re: Tiger Ausf E “F01” Gruppe Fehrmann

Post by AlastairCooke » Thu Jul 16, 2020 9:11 am

Hi All,
Update 16 Jul 20
Let’s start at the front.
20200629_111905-doc.jpg
Proto-typical front roof support. Grey resin web is my 3D print, which will eventually be attached by M2 screws to the aluminium plate. Weld detail will be added later.
20200627_182406-doc.jpg
As promised...clearance for drive motor! :? Good job the electrical terminals face forward! :)
Front support plate added (3mm aluminium sheet) to provide space for electronics and bow MG servo etc.
20200707_165315-doc.jpg
Moving on to the sponsons and engine decking...
20200701_174948-doc.jpg
sponson side supports, drilled and tapped to accept securing bolts for radiator inlet grills.
20200701_175441-doc.jpg
grills and radiator cover attached, will use square head bolts eventually.
20200708_161901-doc.jpg
Milling the extension floor plate for the fan, radiator, and upper fuel tank space. The angle is added so that it fits against the rear hull plate.
20200713_150550-doc.jpg
Marking out the support block for the extension floor plates. Note I am using longer versions of the sponsor securing bolts.
20200713_150607-doc.jpg
Extension plate in position. It will need to be reduced in width. This will be measured up later when the engine space side plates are fitted. Material had to be removed from the custom designed cross brace due to the position of the firewall ‘pocket’ that houses the ventilator fan.
20200620_004414-doc.jpg
rear cross brace milled to accept front of engine and firewall ‘pocket’ plate
20200714_164033-doc.jpg
Some imaginative use of the mill to drill securing holes for the firewall ‘pocket’ attachment system, shown below.
20200715_183521-doc.jpg
Custom designed attachment fixture. This will locate and secure M3 nuts so that the plate can be fixed and removed by means of bolts from the other side. The fixture has been designed so that it can accommodate some of the electronic and switch detail found on the engine side of the firewall. The web (which is not proto-typical) will be hidden by cables etc. Note also the support block for the rear of the engine. This will make a platform on which to sit the engine block and a means of securing the rear support bracket.
Final picture for today...
20200715_184142-doc.jpg
The engine space starting to come together. You can see the oversize sponson floor extensions. The width needs reducing by about 1 cm or so. Also note the non proto-typical bracket for the engine cover support frame. This uses the original holes for the rear plate angle brackets and provides a means to secure the frame at the back. This part will not be visible unless the central cover is removed.
Alastair

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Martin Hofmann
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Re: Tiger Ausf E “F01” Gruppe Fehrmann

Post by Martin Hofmann » Tue Aug 04, 2020 4:49 pm

Hi Alastair,
i had send you a pm about the cooling vents.
Regards Martin

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