RCSCALEBUILDER.COM - Kuhn’s Typhoon In The UK

Home>Forums>Show Your Stuff!!!>Kuhn’s Typhoon In The UK

Forum Jump

3 Pages 1 2 3

Author / Post

	F6F RD Site Supporter	Joined: December/29/2012 United Kingdom Posts: 47 IP Logged
Posted: April/01/2018 at 3:44pm		Quote

Hi Keith

Your Tiffie looks great, hope mine looks half as good. Im hoping mine will come in lighter, built up fuseIage. I looked at using a Zenoah 26 in mine at first but just couldnt see a way to squeeze it in. Not sure you will get a 38 in.

Richard

	RASTROTITO Site Supporter	Joined: September/25/2005 Spain Posts: 44 IP Logged
Posted: April/02/2018 at 12:00pm		Quote

Hi Keith,

Nice looking Typhoon...and sorry about that weight issue!!

I'm building the same model using the Kunh's f/g fuselage too. From the beginning I was worried about the final weight keeping in mind its short nose. Therefore, I moved everything that was possible forward and made the rear end as light as I could.

Nowadays, the model weighs 6,025 kg (or 13,3 pounds) without taking into account surface details, finishing paint and the required ballast, not yet installed.

I've followed the same building tips as in the first Typhoon that I built some years ago (built up fuselage) to achive that weight:

- Hollowed wing and tail ribs.

- Brass parts of the tail wheel retracting actuator replaced with carbon fibre ones.

- Foam tail wheel.

- Rudder pushrod and steering cables replaced with kevlar thread (pull-pull system)

- Fuselage servos moved forward to the firewall, fitted on a sliding tray for easy access.

- Battery/ies or other equipment into ply boxes fitted to the firewall side by side the engine.

- Throtle and cowl flap servos on the firewall.

To be honest, I think that Sparky and Chad are right: maybe an engine replacement with another heavier and powerful one would be the best solution. To build another fuselage wouldn't save enough weight and get too much effort.

Good luck!!!

Jose.

	Keith Site Supporter	Joined: February/29/2004 United Kingdom Posts: 556 IP Logged
Posted: April/10/2018 at 3:38pm		Quote

Thanks for the pics. Kwik and for all other input. I am going to try and retro fit a zenoah 38. After looking at all other engine options, this was - for - the better option. One reason being that the '38 weighs in at 4lb, very usable ballast. Alterations to the firewall and upper radiator area will be on the to do list, awaiting delivery of the engine at the moment.

I have another project on the go also, so this could take some time. And there was me hoping to maiden it once the good weather arrives, oh well !!!!!!!!!!!!

Keith

	kuhn Site Supporter	Joined: February/08/2009 Bulgaria Posts: 2903 IP Logged
Posted: April/10/2018 at 11:40pm		Quote

Hey Rastrotito ...

How about some photos of your Tiffy?

For posterity ... You understand

__________________
Kuhn

If in doubt. Don't!
Flying: HIGH!
Building: Getting my Mo Jo back slowly to finish a few projects.

	Keith Site Supporter	Joined: February/29/2004 United Kingdom Posts: 556 IP Logged
Posted: June/10/2019 at 9:49am		Quote

After much time , my Typhoon is now fit to fly.

Tried a new engine installation with a Zenoah 38 to try and avoid a fus. rebuild. Engine refit went well but still was too tail heavy.

Annoying, because it all fitted really well.

It was decided that a rebuilt fuselage was needed.

To try and limit the required work, I grafted some of the fiber glass fus. parts onto the built up area.

My main aim was to keep the cockpit in tact.

With the rebuild complete, it was time to balance. It was estimated that 2lb ballast was required. So with approx 2 1/2lb of lead melted into a tin can, then trimmed for fitting, this was the outcome. Ballast could not be placed any further forward.

Now for the final test.

I would say that is spot on.

All we need this side of the pond is some decent weather, which according to the met. men, won't be any time soon.

With hind sight, I wonder if the model in original format would have balanced the same if the ballast was located as it is now ???

Model weighs in around the 17lb mark.

	kuhn Site Supporter	Joined: February/08/2009 Bulgaria Posts: 2903 IP Logged
Posted: June/10/2019 at 11:09am		Quote

Quote: keith

With hind sight, I wonder if the model in original format would have balanced the same if the ballast was located as it is now ???

Model weighs in around the 17lb mark.

Keith,

So all of that work of grafting in the balsa wood was probably for nothing.

Nice effort though. Now get that thing in the air.

__________________
Kuhn

If in doubt. Don't!
Flying: HIGH!
Building: Getting my Mo Jo back slowly to finish a few projects.

	kwik Lifetime Site Supporter	Joined: March/27/2004 Norway Posts: 4097 IP Logged
Posted: June/10/2019 at 11:26am		Quote

The ESM Typhoon has composite fuselage, wings and stab.

It balanced fine. With a Zenoah G-38 and lead just behind the spinner.

The fuse has an extremely thin skin, though, stiffened up with a couple of spars.

So thin, that it buckles inwards if you apply pressure with your fingers.

They didnt glue cork or airex or anything on the insides of the fuselage.

It is common practice among more expensive kits.

The problem the ARF producers has, is the acceptable price. People want so much, but are willing to pay so little.....

I put some fiberglass on the insides of the firewall area to stiffen it up for that Zenoah G-38.

Also I angled the engine a bit, to avoid the carb sticking out.

As mentioned earlier, the Saito FG-40 would have been my engine today.

No need to struggle with that muffler.

__________________
Don't expect ,inspect.

Next :
Scale 1/6 Ju-88

In Hangar :
Meister 109
ESM Corsair 50cc
Vailly Fw-190
TF Fw-190
TF P-40
Sist Fw-190 D9
Skymaster F4
BH T33
C-Arf Spit

	Daffy Site Supporter	Joined: November/02/2017 New Zealand Posts: 27 IP Logged
Posted: November/23/2020 at 1:30pm		Quote

Hi Keith.

Hey thanks for the inspiration re the nose weight! perfectly good idea!

I know BT says on his plans to "lighten" this and that but it's not always practical if you want

a long lasting model.

My aim is for around 14lbs all up which I think I can achieve. Oddly enough BT also says on the plans to

measure the C of G with wheels down so just how much that influences things goodness knows.

For the amount of nose weight required I kind of wish I'd done a bigger Typhoon now but hey, it'l be

easy to transport!

I have a CRRC 22R petrol for mine so I hope it's "angry" enough to do the job. Good work shoehorning

a G38 in!

Cheers,

Dave.

Forum Jump

3 Pages 1 2 3

If you wish to post a reply to this topic you must first login
If you are not already registered you must first register

Post Reply New Topic

Similar topics you might be interested in...

FW190 vs. Typhoon vs. Tempest

KMP/ESM Typhoon in Norway

Exxons BT Typhoon

BT Typhoon #3

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum