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Pete's Cavallino Rampante Italian Aerobatic Team Sabre

Colourful Italian Ice Cream Sabre

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Peter Garsden02/04/2020 18:22:12
1734 forum posts
1302 photos

So to the fairings or more accurately fill in the curve of the fuselage over the wing.

First I made some paper templates for the lower sheeting



1/64" Ply is the only way to go as it is flexible enough. I covered the bottom of the fuselage with clear film I use for the plans - it is florist wrapping which is ideal. I should actually have used cling film which would have been better because it is flexible.

I then applied a coating of Cyano to where it meets the bottom of the fuselage and pushed both sides into place. The important thing is that it must follow the dihedral of the wing


I then had to make wedges of 3/16 scrap balsa to support the side sheet of 1/64" ply and push the front and back down to follow the wing. I used my profile tracer I have shown earlier in this blog to map out the curve for each support piece which worked really well. I now have to make another paper template to follow the side pieces, which will also be of 1/64" ply


Peter Garsden03/04/2020 08:03:02
1734 forum posts
1302 photos

This is my exhaust as mentioned on Phil's blog. It is not as effective as the A4 Skyhawk because the exhaust is larger and not as recessed. The test, I suppose is when it gets into the sky!


This shows the advantage of a fibreglass fuselage - thin walls.

The disadvantage usually quoted is weight, but I think we are going to end up with the same weight as the prototype ie. about 4lbs.

Edited By Peter Garsden on 03/04/2020 08:03:34

Peter Garsden04/04/2020 18:48:57
1734 forum posts
1302 photos

Well I think I am done, finally. Have put some panel lines on the yellow mainly to break it up as recommended by Phil. Looks OK. Why am I always first to finish? Good and colourful scheme. I just weighed it at 4lb 71/2oz, which is heavier than I wanted. I did have to add 125gram/4oz of lead in the nose, however. I was aiming for 4lbs so whether mine will cope with 12mph we will have to wait and see.

It was sunny outside just so did a plane on the grass pose. Problem is, flying is banned at the moment so I will have to wait for a sunny day.


Edited By Peter Garsden on 04/04/2020 18:49:53

dan h04/04/2020 20:07:32
120 forum posts
36 photos

hi pete

looks fantastic great job

Phil Cooke04/04/2020 21:23:35
2621 forum posts
1836 photos

Great job Pete - it looks the business! A great coloursheme - I really like the gloss red and blue against that antique cream!

Callsign Tarnish05/04/2020 22:04:52
108 forum posts
2 photos

What's the final weight Peter and have you calculated a wing loading?

Martin Gay06/04/2020 11:41:36
398 forum posts
255 photos

Hi Pete,

As a ballpark figure, there is something like three square feet of wing area on the model.

That will give you a wing loading of about 23.6 ounces per square foot. Pretty good for PSS.

A weight of 3.5lbs will give a wing loading figure of just over 18 ounces per square foot.


Peter Garsden06/04/2020 13:24:56
1734 forum posts
1302 photos

Thanks Martin, just what I needed. At that wing loading it won't be a light wind version!

Martin Gay06/04/2020 14:25:53
398 forum posts
255 photos

Anything above 20mph on the Orme should be fine. Below that and your Canberra will be flying!

Harry Twist06/04/2020 23:13:23
356 forum posts
270 photos

Hi Peter, looks fabulous.. looks like its going fast when its standing still! Well done on the completion, stunning colour scheme.

Peter Garsden09/07/2020 13:35:08
1734 forum posts
1302 photos

Maiden Flight - Sunday 5th July 2020, Mermaid Pool, Leek, Staffordshire, England.

whatsapp image 2020-07-08 at 12.10.26.jpeg

It was a blustery day up at 1,500 feet above Rudyard Lake near the Roches in Staffordshire England. The wind was blowing at between 25mph and 35mph. The D60's and D80's were going a storm, so I figured there was enough wind to try out the Sabre. This is where they hold the Scale Day each year in August. There is a good landing area to use.

PSS models generally do not fly well here. Whilst it is a good slope for sports models, PSS models do tend to just hang there and not really perform well. The Orme is a much better test, and there is a fly in this weekend, so we will have to see.

whatsapp image 2020-07-08 at 12.10.26 (2).jpeg

This model has an all moving tailplane so it is difficult to judge angles. I got Martin to launch. As you can see from the video I needed more down. I adjusted the sub-trim and launched again. This time it soared away. It still needed a bit more up elevator. I have adjusted it at the clevis now ready for next time.

It is difficult to judge but it seemed difficult to gain height even in that wind. The all up weight is 4.5lbs which is about 8oz more than most examples (about 23oz per square foot). I put this down to heavy Glosstex covering, which I reckon added 1lb. Whilst it flew well, the fuselage seemed to wobble from side to side a bit. It was not overly sensitive on elevator as would suggest a c of g too far back. It was however very sensitive on ailerons as most swept wing models are.

I landed and decoupled the flaps from the ailerons. I had them mixed in. This seemed to give a much better and less twitchy aileron response.

I used a closed loop rudder with long tubes from the fuselage. I have tightened up the cables in case that is what the problem was. In other words the wind catching the rudder and throwing the model around in the very strong wind. The rudder is now a lot tighter.

It didn't feel quite right, however, though it did fly. I only have the launch on video unfortunately.

I went back home and tried out the c of g on my new Vanessa Launch winch. I reckon it was about 5mm too far back, so I have added some more weight to the nose but have not tried it again. Watch out for the next post when it is sorted.

Oh and a big thank you to Brian for the pictures and video.

Edited By Peter Garsden on 09/07/2020 13:35:49

Edited By Peter Garsden on 09/07/2020 13:36:24

Steve Houghton09/07/2020 15:49:33
584 forum posts
438 photos


Congratulations on your maiden. Glad it went well.

That's a really nice looking model - great work.

Phil Cooke09/07/2020 22:35:05
2621 forum posts
1836 photos

Great work Pete - somehow you are always the first to finish and fly the Mass Build subject ahead of the event! Impressive stuff!

I look forward to seeing your new model in action on a more suitable slope this weekend - lets just hope we get the winds for our sport!?

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