Topic: Graupner jet boat (Read 2977 times)

6705russell · « **on:** August 30, 2021, 11:26:59 am »

I have a Graupner jet boat coming soon and wondered if anyone had built the same, wondering what the steering set up is on these as cannot see the control rods to steer the bucket on the pictures I have looked at?

Thanks

gingyer · « **Reply #1 on:** August 30, 2021, 11:50:45 am »

This build thread may help

https://www.modelboatmayhem.co.uk/forum/index.php/topic,60102.0.html

jaymac · « **Reply #2 on:** August 30, 2021, 12:43:48 pm »

https://www.rcgroups.com/forums/showthread.php?3123367-Early-Graupner-jet-boat-thread

there is also a section for jetboats

JimG · « **Reply #3 on:** August 30, 2021, 01:13:53 pm »

I built one a couple of years back, nowhere near the standard as Umi's work, I made it straight to the plans. I hope that these photos will help, not as focused as I would like but tricky to get a photo of this area.
Jim

6705russell · « **Reply #4 on:** August 30, 2021, 02:55:52 pm »

Hey thanks guys, appreciate the replies.

6705russell · « **Reply #5 on:** August 30, 2021, 03:11:01 pm »

So it looks to me like they steer via a tank steering set up, or am I looking at it wrong? Is there a steering part in the actual jet unit?

gingyer · « **Reply #6 on:** August 30, 2021, 05:31:37 pm »

There is a controllable steering nozzle on each drive along with a reverse bucket

6705russell · « **Reply #7 on:** August 30, 2021, 06:33:47 pm »

Umi_Ryuzuki · « **Reply #8 on:** August 30, 2021, 06:36:58 pm »

Single Jet diagram.

6705russell · « **Reply #9 on:** August 30, 2021, 06:39:38 pm »

Thanks Umi, I had a look at your build, very nice

jaymac · « **Reply #10 on:** August 31, 2021, 10:30:54 am »

My proboat PBR was going to fit buckets but with the jets being steerable it turns on the spot Tank steering not needed. OK no reverse but in open water not really a problem. are the Graupner jets are not steerable

JimG · « **Reply #11 on:** August 31, 2021, 12:15:53 pm »

The Graupner jet units are steerable and the boat turns well. I did find that reverse steering is not very effective with the reversing buckets fitted. Independant control of the motors or reversing buckets would help with this although I have not tried this yet.
Jim

6705russell · « **Reply #12 on:** August 31, 2021, 12:49:27 pm »

I have seen the operation of one now, I couldn't see the steerable nozzle on the pics I was looking at but also notice Krick now sell the same jet unit so should also be ok for spares if needed.

Thanks

Martin (Admin) · « **Reply #13 on:** August 31, 2021, 01:43:35 pm »

I just purchased one of these Graupner Multi boats, let me know if you want me to take any particular photos.

6705russell · « **Reply #14 on:** August 31, 2021, 02:36:48 pm »

Thanks Martin, how/where did you come by yours, seem to be rare as hens teeth now?

Martin (Admin) · « **Reply #15 on:** August 31, 2021, 03:13:41 pm »

A random post on Facebook..... as you say 'hens teeth'!

6705russell · « **Reply #16 on:** August 31, 2021, 03:21:17 pm »

That looks like one of the earlier version with seperate hull/deck, what motors are installed Martin?

Martin (Admin) · « **Reply #17 on:** August 31, 2021, 03:53:46 pm »

Ah! Didn't know there were two versions!

Don't know what motors, no marking that I could see, but I'll have another look.....

6705russell · « **Reply #18 on:** August 31, 2021, 03:57:00 pm »

The earlier versions were seperate hull and deck and the later ones were blow moulded all in one...

Martin (Admin) · « **Reply #19 on:** August 31, 2021, 04:20:41 pm »

How did you get the wheelhouse off, to get inside?

6705russell · « **Reply #20 on:** August 31, 2021, 04:25:38 pm »

Haven't built it yet but it will be the same as the SARS I am building now, wheelhouse is separately built with the die cut plasticard so comes off in one.

jaymac · « **Reply #21 on:** August 31, 2021, 07:30:45 pm »

This not it since Krick took over
https://www.cornwallmodelboats.co.uk/acatalog/Krick-Rescue-Jet-Boat-K26330.html

JimG · « **Reply #22 on:** August 31, 2021, 07:31:33 pm »

When I built mine normal styrene glue was not very effective on the die cut pieces. I tried Plastiweld which normally works well and found the joints failed. I ended up using a 2 part Acrylic glue which worked well.
Jim

6705russell · « **Reply #23 on:** September 01, 2021, 07:15:49 am »

Quote from: jaymac on August 31, 2021, 07:30:45 pm

This not it since Krick took over
https://www.cornwallmodelboats.co.uk/acatalog/Krick-Rescue-Jet-Boat-K26330.html

Same drives but not the same boat..

6705russell · « **Reply #24 on:** September 01, 2021, 07:16:52 am »

Quote from: JimG on August 31, 2021, 07:31:33 pm

When I built mine normal styrene glue was not very effective on the die cut pieces. I tried Plastiweld which normally works well and found the joints failed. I ended up using a 2 part Acrylic glue which worked well.
Jim

I always use cyanoacrylate on plasticard, usually stands the test of time Jim.

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Author Topic: Graupner jet boat (Read 2977 times)