Help needed!

Italian Stallion

Sunday, October 5th 2008, 10:37pm

Dorsal is on the top of the fuselage, ventral is underneath. I think the turret is around the correct size. What about merging it with the aft of the cockpit for putting some handheld guns there like the Ju 88? A ventral gondola with free mounting is probably period-appropriate.

Go to the top of the page

Vukovlad

Me too !!!

Posts: 4,137

22

Sunday, October 5th 2008, 10:49pm

B-14A

I dont know how much closer to the Wellington turret I can come in this size

Go to the top of the page

HoOmAn

Keeper of the Sacred Block Coefficient

Posts: 7,417

23

Sunday, October 5th 2008, 10:59pm

Thanks a lot Vukoflad. The ventral turret now is fine on the B-14A.

On the lower MG mount: I´m still not satisfies. Neither size nor position seems ideal. I probably will re-write the encyclopedia so that the A-version will need no lower mount but instead will have two MGs in side windows.

So could you make me a version without that lower mount?

C-variant will then need a ball turret and a new nows. You got that latter part quite well on the lower pic. Same for the rear gunners position. According to the text the C-variant got new turrets so that would would be okay.

Thanks again.

Go to the top of the page

Vukovlad

Me too !!!

Posts: 4,137

24

Sunday, October 5th 2008, 11:07pm

New variants

This post has been edited 1 times, last edit by "Vukovlad" (Oct 5th 2008, 11:14pm)

Go to the top of the page

howard

Unregistered

25

Monday, October 6th 2008, 3:06am

Best of the lot so far submitted. I see no problems with this one.

Would like to see the 3V and a scale bar so I can run some Wangs.

H.

Go to the top of the page

Vukovlad

Me too !!!

Posts: 4,137

26

Monday, October 6th 2008, 3:11am

RA posted the 3-view and google Ju-89

Basic data:
* Crew: Five
* Length: 26.49 m (86 ft 11 in)
* Wingspan: 35.25 m (115 ft 8 in)
* Height: 7.60 m (24 ft 11 in)
* Wing area: 184 m² (1,979 ft²)
* Empty weight: 17,000 kg (37,480 lb)
* Loaded weight: 20,800 kg (50,266 lb)
* Max takeoff weight: 27,800 kg (61,160 lb)
* Powerplant: 4× Daimler-Benz DB 600A, 560 kW (750 hp) each

You have a better program than planebuilder?

Go to the top of the page

Red Admiral

Italian Stallion

Posts: 7,019

27

Monday, October 6th 2008, 3:15pm

Quoted

You have a better program than planebuilder?

There are many better programs but all are considerably more complicated and most likely cost £1000s for a licence depending on which. Planebuilder more or less works and is free.

Go to the top of the page

Vukovlad

Me too !!!

Posts: 4,137

28

Monday, October 6th 2008, 4:53pm

I was thinking of free program not something used in actual aircraft design

Go to the top of the page

howard

Unregistered

29

Monday, October 6th 2008, 7:56pm

http://i25.photobucket.com/albums/c84/Av…s/Junkers89.jpg

Yikes, the drag on that thing is AWFUL.

RA, do you agree that you need 900 kW (1250 HP) engines to coax out decent performance?

H.

Go to the top of the page

thesmilingassassin

The Chosen One

Posts: 13,513

30

Monday, October 6th 2008, 8:19pm

A very important stat is missing, whats her bomb load capacity?

Go to the top of the page

howard

Unregistered

31

Monday, October 6th 2008, 8:28pm

Quoted

Originally posted by thesmilingassassin
A very important stat is missing, whats her bomb load capacity?

With that draggy wing and those engines with the range of 3000 kilometers?

1600 kilograms bombload is what I estimate.

H.

This post has been edited 1 times, last edit by "howard" (Oct 6th 2008, 8:28pm)

Go to the top of the page

Red Admiral

Italian Stallion

Posts: 7,019

32

Monday, October 6th 2008, 8:52pm

I played with a few numbers in planebuilder and it more or less works with the 960hp engines, but would be a nicer fit given higher power engines like the DB601 of around 1100hp. Bomb load for 3000km range seems pretty good at around 2500-3000kg.

Go to the top of the page

Hrolf Hakonson

Scooby-Doo

Posts: 6,178

33

Monday, October 6th 2008, 9:04pm

Another good option would be the Jumo-211, instead of the DB-600/601.

Heh, there's a reason why WW Germany wasn't interested in putting the Ju-89 or the Do-19 into production. The WW Ju-90 V-4 and V-5 were built with the BMW-139 to try to get more power, but that engine was a failure, so the V-6 is currently being built with BMW-801s, Junkers is hoping to get it into the air by the end of 1936.

Go to the top of the page

Vukovlad

Me too !!!

Posts: 4,137

34

Monday, October 6th 2008, 9:39pm

I should have of course posted the stats for the B-14 and not for the Ju 89.

B-14 stats SAE encyclopedia:

First Flight: 11.4.1933
Type: Heavy bomber
Power: 4x 960PS 12-cyl.-engine (inline)
Crew: 9
Vmax: 390km/h
Vcruise: 320km/h
Range: 3000km
Weapons: 2200kg bombs, 8 7,62mm MG

Go to the top of the page

howard

Unregistered

35

Tuesday, October 7th 2008, 2:19am

Quoted

Originally posted by Vukovlad
I should have of course posted the stats for the B-14 and not for the Ju 89.

B-14 stats SAE encyclopedia:

First Flight: 11.4.1933
Type: Heavy bomber
Power: 4x 960PS 12-cyl.-engine (inline)
Crew: 9
Vmax: 390km/h
Vcruise: 320km/h
Range: 3000km
Weapons: 2200kg bombs, 8 7,62mm MG

I don't think the engines are quite powerful enough for the performance claimed.

H.

This post has been edited 1 times, last edit by "howard" (Oct 7th 2008, 5:56am)

Go to the top of the page

HoOmAn

Keeper of the Sacred Block Coefficient

Posts: 7,417

36

Tuesday, October 7th 2008, 9:38am

Why do you think so?

Go to the top of the page

Vukovlad

Me too !!!

Posts: 4,137

37

Tuesday, October 7th 2008, 3:38pm

No longer having much resemblances to the B-14/Ju89, perhaps a new generation SAE bomber

Go to the top of the page

HoOmAn

Keeper of the Sacred Block Coefficient

Posts: 7,417

38

Tuesday, October 7th 2008, 4:26pm

Well, this one finally what I originally had in mind - just with inline engines. But you´re right. her fuselage has changed a bit. Probably a B-14D/E variant? Or a real follow-on?

Do you also think it looks a lot like a Short Stirling with a different tail?

I will check all drawings again and see what I choose. Thanks again for your help!