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Member postings for Richard Harris

Here is a list of all the postings Richard Harris has made in our forums. Click on a thread name to jump to the thread.

Thread: Revolver Pusher type Autogyro trainer
21/11/2019 21:27:40

Chris,

A rare event from Mr Hand launch! ,Glad you figured the video embedding out and thanks for posting them thumbs up

Rich

Thread: Rotor Blade C.of.G posn.
21/11/2019 21:24:32

Anthony

I fly one of Cruisers on these blades, I think they are Whippit blades.

The mounting hole centre is roughly 25mm from the LE and the width of the blades are 60mm. This set of blades has served me well for many years.

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Thread: Revolver Pusher type Autogyro trainer
19/11/2019 11:58:37

Trevor,

Everyone goes their own way which adds many variables, motor KV, prop diameter/pitch etc, these all effect the offset which is why it is necessary to 'fine tune' each particular model.

Rich

Thread: Rotor Blade C.of.G posn.
19/11/2019 09:34:23

Hi Tony,

Welcome to the forum.

I will check my blades later on as I cant remember their width but I think you will be OK with a mounting hole position 22mm back from the LE.

Rich

Thread: Revolver Pusher type Autogyro trainer
19/11/2019 09:31:15

Chris,

This explains how to add a video to a post.

Trevor,

Sounds like you need to move your motor further out to the right. As Chris suggests (and hopefully he will manage to upload the video surprise), tethering the model via a string on the rotor spindle and powering the model adjusting the motor until it sits stationary.

Your model will fly ok as it is but you will get a slight left yaw as you bleed off the power and vice versa as you increase RPM. Right hand roll turns will almost certainly be effected as your set up stands but they will always require a little more control input than left handers due to the CCW blade rotation.

Rich

28/10/2019 21:41:37

Congratulations Trevor, an enjoyable blog that is sure to encourage others to have a go at these fascinating flying machines.

Rich

Thread: source of 2mm Depron?
28/10/2019 09:39:13

Last time I bought some was from SAMS but they have run out.

If you can cope with 3mm B&Q sell it HERE , they also sell 6 and 10mm thicknesses

Rich

Thread: Revolver Pusher type Autogyro trainer
23/10/2019 21:43:04

Nice one Trevor,

It may be worth reducing the thickness of your shims on the blades as well as moving your battery back. More rearward tilt means more drag which requires extra power to push it forwards.

Rich

Thread: Panther Trainer Autogyro
23/10/2019 21:26:44

Michael,

That's one nice looking Panther, congratulations smile d

RPG or Revolver ? They both fly well and you can utilise the Panther rotor blades on both. The RPG is bigger than the Revolver and requires making the head yourself (as per the Panther) where as the Revolver uses the Razer unit.

It personal choice but, you could always build both!

Rich

Thread: Model flying photos you're proud of
13/10/2019 10:54:39

Taken this year, Team Renegade with their PB Bullets.fb_img_1570959904903.jpg

And a not so fixed wing biased snap at one of our autogyro fly ins, lots going on.

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Thread: Revolver Pusher type Autogyro trainer
02/10/2019 16:35:31
Posted by Gary Fentiman on 02/10/2019 15:05:41:

This looks like a great build Anyone know where I can get a set of plans from please?

Gary,

Sometimes back issues are still available which include the plan and write up, best person to guide you in the right direction is David Ashby, if he doesn't see this send him a PM.

Failing that Sarik hobbies sell the plan, part kit and canopy if you look HERE.

Rich

01/10/2019 21:10:49

I have been looking forward to this Trevor, well documented as usual. You will have to find another 'winter project' at this rate.

Rich

31/08/2019 21:15:01

Resistance is futile Trevor, you will have that together before the winter is set in!

Here is where I'm at with my second Revolver, fin only with a cranked boom giving me room to lower the motor.

The blue canopy may not be fitted as I'm awaiting a vac formed version from SARIK hobbies off my plug.

 

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Edited By Richard Harris on 31/08/2019 21:17:07

30/08/2019 15:40:46

Hi Mike,

With a 3 blade rotor system I aim for an aspect ratio of around 10:1, length is determined by the weight of the model and whether I want it to fly lightly loaded or not, this aspect ratio increases with 2 blades with a like for like model as you need an increase in blade length.

When I first started messing most were using a Clarke Y aerofoil or a similar section with a chamfered lower TE. Through experimentation (and a bit of luck) I came up with a section that has a sharp LE, this is what I use on pretty much all my models from about 2010. They have a good spin up, plenty of lift and above all are easy to make.

Rich

28/08/2019 21:08:32

David,

If your blades are close to the fin when tilted right back then that is more than enough for them to spin up with a slow taxi into wind.

On Saturday they did seem to take a little longer to get to full RPM, once in the air they were fine with lots of lift. What I would do is add extra shim to each blade, only thin shims, I find that masking tape works ok.

Try that and see if this improves spin up? you will find that by adding extra shim you may need to add a click of extra rearward tilt.

You could also try hand launching? I know Chris from down under swears by this, I'm sure he made a video of how he does it too.

Talking of videos here is the small amount of footage I captured of your first flight with an autogyro including the landing.

Rich

Thread: New Poll - sticky situations.....
26/08/2019 21:18:58

Everytime time for me along with blood on pretty much every model I have built.

Edited By Richard Harris on 26/08/2019 21:19:37

Thread: Revolver Pusher type Autogyro trainer
26/08/2019 21:14:39

It was a pleasure meeting Dave with his Nellie Revolver last weekend st the Nationals.

No issues were encountered, all that was required was a few clicks of rudder trim. Dave was soon doing circuits for the first time and I think he was pleased with his results.

Unfortunately I only had my phone on me but I did grab a few photos and a minutes worth of footage.

 

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Edited By Richard Harris on 26/08/2019 21:15:10

Edited By Richard Harris on 26/08/2019 21:15:29

20/08/2019 16:35:13

David,

Sounds like a plan, PM sent. Weather is looking really good for the weekend smile

Rich

20/08/2019 09:36:42

David,

I really like what you have done with your Revolver smile d

Regarding the Fly In I am hoping to go but nothing is set in stone at the moment, I do fly mode 1 and would be more than happy to maiden and trim out your Revolver.

Not sure if you go or not but I'm off to the Nationals this coming weekend, I will slip mine into the caravan in hope that I can get some stick time on the evening RC line. If you do happen to be going then bring it along?

Rich

18/08/2019 10:31:39

Tim,

Horizontal Stabs act as pitch dampeners giving the ability to stabilize an autogyro with a thrust line offset to the CG (vertically) as does the drag from the rotor disc. As long as the thrust line is close to the CG in height the horizontal stab can be removed.

Yaw is effected by the motor torque and prop wash, it can be increased or decreased by either moving the motor/ rotor spindle to the side or the position of the vertical fin and its area from the prop. It can also be controlled via mixing of radio inputs at different throttle settings.

The stab does make a good mounting point for the outer fins, these were added to give about 25% of added extra vertical area out in unblocked air for added stability when the motor is off.

As I am removing this the extra vertical area it will be added to the standard fin.

Rich

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