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Gyroo II 'the pusher version'


Richard Harris
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It was modified after you picked up the issues Chris but everyone else had built theirs by then. I've since revised the design by simply making the horizontal fuselage pieces insert into smaller slots rather than having a full length slot along the fuselage, they are also doubled up with a few other minor tweaks.

When I get round to it I will build another to the revised drawing.

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  • 3 weeks later...
Posted (edited)

Before I get going on the bullet proof Rev 2  Gyroo II I decided to knock up a 2 blade set up to test in readiness. Each blade is 600mm long and they are mounted to a 1mm thick fibre glass plate, I think it  was one I used on an Atom many moons ago.

These blades use no negative shim and seem to spin up well. After the first session I added 5ps to each tip and reduced the throws by half. It was a bit windy here yesterday and quite bumpy at low level but it coped well. 

Here are a few snippets of video I took.

 

 

Edited by Richard Harris
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Posted (edited)
29 minutes ago, Chris Dowell said:

I just worked out what you mean.

5 Pence.

You could said that you added a metal disc with a diameter between 18 / 23.59 mm with a weight of between 3.2/5.65 gms ...just to make it clear .

(farthings)😆

 Chris...

My old man sorted this six pence out which is pretty close, now we are on the same page:classic_laugh:

 

 

 

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These will be removed and I will inset some lead to match.

 

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Have you managed to get out with your yert Chri?, wheather here is still poor.

 

Edited by Richard Harris
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We always were on the same page ...it's just that you are on the top line and I on the bottom one.😂

Unfortunately I have not been flying recently .My flying club is located very close to the sea and when the wind comes from that direction it can become unflyable in a couple of minutes.

But yesterday I got me a new printer. Just released Ender 3 v3 core XZ . Man its like a jack rabbit on steroids' .

It's like this ,that every time I get a new electronic toy .I go through this like, hate period.

I like it but it hates me .

But this new toy was extremely easy on me and we are now good friends...well that's until it starts playin up ...and it will ,one day.

I happen to have a set of 600mm blades lying around so I hope to make a two blade set to try on this model. So what is the starting angle on the head ?

 

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  • 3 weeks later...
On 04/04/2024 at 11:25, Paul De Tourtoulon said:

What's that in Euro ?.

🤣

 

 

 

A little update on the 3d printed version of the Gyroo II being done by Ian. The design has been updated so that it can be printed on machines with a lower Z axis height keeping the parts to a maximum of 200mm, well within the limits of the popular models. This has meant splitting the fuselage and blades into 3 parts and the horizontal stab into two, it still needs a few tweeks but matches the lines/weights of the traditionally built version and flies just as well. Out of interest the blade segments take 12 hours to print and the whole model is from PLA so no fancy plastics.

If all goes to plan I will see if I can persuade the editor to maybe incorporate the files and print instructions somehow to accompany the plan and  article when ever its released.

 

A few photos from a get together yesterday.

 

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  • 3 weeks later...

That is one fine printed project .I do have a question re the blades. What size are the blades ,what is there weight and what is the weight of the complete blade assembly.

Yes ,I am printing blades for this model and need to compare.

 Happy Landings

 Chris...

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6 hours ago, Chris Dowell said:

That is one fine printed project .I do have a question re the blades. What size are the blades ,what is there weight and what is the weight of the complete blade assembly.

Yes ,I am printing blades for this model and need to compare.

 Happy Landings

 Chris...

 

Hi Cris Watched your video flying the Gyroo Eleven 🤔

May I ask how far apart are your wheels and do they give a positive angel of attack for the blades. 🤔

 

Steve

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Posted (edited)

Greetings  Steve..

I always spread the wheels as far apart as possible on all my models.it helps with spill on landing.

420mm from inside to inside. The wheels are 90 mm printed and find they are so easy to see and do help with the angle of attack. I think you could see in the video how easy the blades spun up whilst the model was stationary.

Sorry that I was unable to post the video on this site.

Chris...

Edited by Chris Dowell
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I tried a set of Paul Bray's printed blades on the beast today and was very happy with the results.

The blades are printed in PLA and are 500mm X 65mm with a weight of 57 gms.

The entire assembly comes in at 206 grams compared to a similar set of balsa blades at 175 gms . Although 30 grams heavier ,I was most impressed by the performance.

I had no tip weigh and found them to spin up in a light breeze.

This is the 90 mm wheel that is also printed.

I did have a video of this flight ....but I lost it.

 Chris...

DSC03455.JPG

DSC03426.JPG

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On 08/05/2024 at 10:32, Chris Dowell said:

That is one fine printed project .I do have a question re the blades. What size are the blades ,what is there weight and what is the weight of the complete blade assembly.

Yes ,I am printing blades for this model and need to compare.

 Happy Landings

 Chris...

 

Chris,

 

I'm unsure but I do know that Ian has spent a lot of time perfecting them so they match the originals blades pretty much exactly. He's just perfecting them in the Cura slicing programme as he uses something different.

 

How do you get on with the printed stuff in all that heat?

 

 

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At my club we have under cover tables to set up our models .My models when not flying are always under cover. My car has good A/C and so there is no prob in transport. And so the heat is not a problem of coarse my workshop is well insulated. That is apart from the one time I left a printed cub in my car which was in the garage (that is not insulated)and it now have a very distinctive ripple to the wing.

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Yes Steve,   Your model appeared to be OK in flight but it did look as if it was struggling with the ROG. You will have noticed in my video ,the model was on a short run and jumped into the air.with both type of blades.

Here are the weights you asked for..

Fuz alone  29.3 ozs

Balsa blades 510 X 55 mm  5.9 ozs

Printed blades 500 X 65 mm  7.45 ozs

lipo 6.9 ozs     which comes to model with balsa blades =2.63 lbs

model with Printed blades 2.72 lbs

Now this is not much lighter than your model. I'm sure both models are carrying considerably ballast up front.

I have found that when flying with the printed blades I have to reduce the back trim considerably. The model also flies very well on the balsa blades.

I don't know if you have a 3D printer or a good friend with one ,because these blades designed by Paul B are the way to go.

I was always worried of the damage that may be caused by striking the ground. Pleased to say that I have tested them for this as well as the blades making contact and folding on arrival.All OK

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Keith.

Go take a look over in RCG..............  autogyro..............mantis 3D printed files....#113

I sliced using creality print  old verson ..not 5.0     and not creality  slicer.

If you want any more details ..just ask.

 Chris...

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