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Panther Trainer Autogyro

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Panther Autogyro

Panther Autogyro

info for builders of RCM&E's March 2013 free plan

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March 2013 issue preview

in the shops 8th Feb!

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Second Time Around

Second Time Around

Colin Budds rediscovers his love of autogyros

Trevor20/06/2020 17:53:41
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452 forum posts
57 photos

It was the Rolls Royce of gearboxes back in the days of brushed motors, with the advantage that, by changing the drive pinion, you could fine tune the gear ratio to the propeller you were using. This fine tuning was much more critical to successful flight in those days. See here for a couple of examples of them in use.

**LINK**

I seem to recall the colour scheme of my Panther was based on someone else’s so by all means use/copy/amend it as you wish.

Trevor

Richard Harris21/06/2020 12:29:08
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2171 forum posts
2023 photos

David,

Good to hear you have had success with your Atom, your a braver man than me going out in blustery conditions to trim a model.

Your Panther is coming along , top notch job by the way smile d

The yellow and blue scheme was originally done by one of the beta nuts Ian Smith, he is still flying his model and is developing his own designed 3D printed blades which are very clever in their design.

This is the his Panther:

ians panther.jpg

Rich

David Oatham06/07/2020 20:08:37
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8 forum posts
20 photos

Hi Richard, covering almost complete now and loosely based on Ian's and Trevor's schemes. It has gone very well and is looking the cats whiskers 😃, however I'm a bit concerned about the weight-gain of the blades once covered. I decided to use the sticky-backed plastic method mentioned somewhere in a forum by yourself. The blades weighed 51 gm each prior to covering. I've only covered one at present, and it now weighs 64 gm 🤔. Does that seem too heavy? If so, what would be an average ideal weight of a blade 55 x 7 cm?

I'll post some photos when it's finally assembled

Dave

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Richard Harris07/07/2020 16:40:11
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2171 forum posts
2023 photos

Hi Dave,

Your blade weight at 64g will be fine thumbs up, in fact, your more likely to have issues with lighter blades than heavier ones as they are more sensitive in roll.

The only real issue I have had with weighty blades are they can be almost impossible to spin up and tend to droop ever closer to the fuselage top/fin.

Its worth noting that when the blades are covered the overlap of the covering is 'down wind', a simple sketch I made explains it easier:

covering.jpg

Look forward to seeing you completed Panther smile d

Rich

David Oatham07/07/2020 17:00:52
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8 forum posts
20 photos

Thanks Rich, that is really encouraging thumbs up

I have applied the covering exactly as you suggested.

I now have to decide whether to fit the OS 40FS that I have sitting ready, or whether to raid another model of mine containing an OS 52FS. In your experience, do you think the OS 40FS would be powerful enough?

The estimated all-up weight seems to be about 4.5lb without fuel.

Dave

Steve Jones 207/07/2020 17:10:33
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586 forum posts
431 photos

Dave,

 

100% the 52 4st.. I have the ASP one in my second Panther....

sam_1774.jpg

sam_1895.jpg

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4oz tank is all I could get in and flight times are ok but not long. Power is plenty so half power is a great cruise...

Sounds great compared to the 2str engine in my first.

I have seen a couple with 40 4str.. they fly Ok if the engine is on song.... but not much in hand...

Good luck

Steve

Edited By Steve Jones 2 on 07/07/2020 17:11:28

Richard Harris07/07/2020 17:11:53
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2171 forum posts
2023 photos
Posted by David Oatham on 07/07/2020 17:00:52:

 

I now have to decide whether to fit the OS 40FS that I have sitting ready, or whether to raid another model of mine containing an OS 52FS. In your experience, do you think the OS 40FS would be powerful enough?

 

 

Hi Dave,

Easy one to answer, go with the OS52FS, one of my friends has an early non Surpass 40 in his and it does fly  well. But, it has to be running at its peak RPM, if not it does struggle around the sky and he is the best autogyro pilot I know.

There are a few of the boys who have the OS 52's fitted and have plenty of power on tap, I'm sure the 48 would work well too.

 

Rich

Edited By Richard Harris on 07/07/2020 17:12:44

Edited By Richard Harris on 07/07/2020 17:23:41

Richard Harris07/07/2020 17:14:32
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2171 forum posts
2023 photos

Steve beat me to it with the same answer!

David Oatham07/07/2020 17:23:31
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8 forum posts
20 photos

Thanks guys, that's my mind made up on that score thumbs up smiley

David Oatham18/07/2020 17:37:21
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8 forum posts
20 photos

Thanks Steve / Rich,

Well it wasn't quite as straight forward as I thought replacing my OS40 FS with the 52, it almost fitted!! Some mods to the cowl were required but all good now. I'm almost t of excuses for flying my Panther, but I'm soooo glad I re-read parts of the forum regarding balancing. I had made the classic mistake of carefully balancing the model without the rotor blades fitted. Having re-checked the CG with the rotor fitted, she now is a bit tail heavy, which is annoying as I had to add some lead under the covering below the tail to balance her previously angry 2

Oh well, out with the scalpel later to remove the deadweight.

I've also decided that maybe I need to make more dust to produce a canopy .... Phew, 2 more reasons to delay 'Lift-off' wink

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David Oatham18/07/2020 17:37:59
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8 forum posts
20 photos

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Richard Harris18/07/2020 20:41:56
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2171 forum posts
2023 photos

David,

That is absolutely fantastic, you have got to be pleased with your efforts? looking forward to hearing how the trimming hops go smile d

On another (still autogyro related) note, I've just maidened this Weir W2, built maybe 10 years ago by Dave Muir to around 1/5 scale. I have had to do a bit of reworking to it as it got damaged in storage, fitted a pilot and threw on a set of Revolver II blades before I make a fresh set.

I'm pleased with the way it performs apart from roll seems a little sluggish going from a bank right to left, will need to upgrade these servos before heading out again.

The original W2 resides in the National Museum of flight up in Edinburgh. It had two tailplanes, the one it has on it now and another version it flew with. Its engine was a home made twin made by Weir, Dave has replicated really well.

Rich

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