Data RPG Owners

[Norfolk Flyer]

Hi Dave,

You were really restricted by those trees. I don't think I would feel confident enough to fly a 'gyro there so well done.

Regards
John

[imsofaman]

Hey John! Well....it is rudder...rudder....rudder! aileron wants to drop altitude too fast as it was not going as powerful as earlier.


OK...so the 12x8 prop 3 lbs 1oz (The prop in the video!!!!!!)

12x10.....I have lost it! No...not hanging from the cieling either!

13x6.5.... 4 lb 4oz

13x8.....4 lb 1 oz.

14x7 cut down to 13"...... 4 lbs 8 oz.

All this data is produced with 4 cell A123 packs and using a digital scale.

The cut down 14x7 is now on the gyro ready to fly again. Not liking my 5 cell servo pack as it dies fast. I may need to replace that soon.

Carry on men!!!

Dave

[SafeLandings]

Hey Dave...great video!!..looks like you have that bird flying well...it did the same for me when I fitted 5s into it...dropped like a stone...its because it is a little to heavy. As soon as that propellor slows down and you have no forward speed you loose all yaw and its straight down!!normally if there is a wind it will weather cock into it, that battery dropped off really quick!
There also doesnt seem much more power?..but with the extra weight perhaps this is why?
I have found the best way to land the RPG is with power on right until touchdown.

Looks like the weather is really good at the moment over there super footage in amongest the trees..keep the videos coming


Regards Rich

[imsofaman]

Look closely at my data on the previous post!

I was only getting 3 lbs of thrust along with the heavy weight of the cells. That is what I was flying with along with a pack half used up. If you think about it....it is amazing it flew as it did. LOL!!!

Next video will show off the extra power. Cut down 14x7 provides the power desired. Cant wait to try it.

Dave

[SafeLandings]

Great Dave!!...looking forward to some more video footage ..you are flying it really well...its such a pleasure to watch

Rich

[imsofaman]

A little more data for the RPG and or gyros with load sharing.

I dont know how you guys set up your head. Or I know for sure you go with delta wing. But with this set up, there is a slight problem with the autogyro. That would be: You want less travel on the ailerons....but increased on the pitch.....that is the problem. Less travel dialed in on the aileron, only effects that ONE servo. More travel on the elevator effects the opposite servo ONLY. You need the head to stay at a constant pitch as you roll left or right and this is very important. If you change the travels differently between elevator and aileron, you may experience the head rolling left and the head actually pitching down for Example. Please do a lot of bench testing of the head before flying!!!!! Keep the pitch level when rolling left and right.

The only solution is to keep the travel rates on elevator and aileron the same. The only saving grace for this delima is the EXPO. On my radio (Spektrum and JR), + EXPO reduces the travel towards the center of the stick. On the Futaba, - EXPO does the same. Just be careful of EXPO until you understand how it effects your aircraft.

OK....I have pontificated enough. Just thought I would throw the info your way if you need it or not.

Dave

[SafeLandings]

Dave,
On the Tempest with the teetering head , very little roll is needed but plenty of rearward tilt is needed for prespin...I just set the roll dual rate switch to something like 30% but keep the pitch at 100%. That is on a Futaba system and works ok with me

Regards Rich

[imsofaman]

Awesome point Rich...dual rates will fix the problem! Thanks so much mate!

Dave

[Boneswamped]

Originally Posted by SafeLandings

Sounds like that thing is going to work well Dave........



Here is a photo taken today of my RPG flying with its 3 bladed Aerobalsa blades fitted that I mentioned id been testing in my Thread.

Hello Rich,
I have a question, where and how much weight did you use on your AB blades? There have been a couple of different methods, and I want to get it right.
Thanks,
-Mike

[Norfolk Flyer]

Originally Posted by imsofaman

A little more data for the RPG and or gyros with load sharing.

I dont know how you guys set up your head. Or I know for sure you go with delta wing. But with this set up, there is a slight problem with the autogyro. That would be: You want less travel on the ailerons....but increased on the pitch.....that is the problem. Less travel dialed in on the aileron, only effects that ONE servo. More travel on the elevator effects the opposite servo ONLY. You need the head to stay at a constant pitch as you roll left or right and this is very important. If you change the travels differently between elevator and aileron, you may experience the head rolling left and the head actually pitching down for Example. Please do a lot of bench testing of the head before flying!!!!! Keep the pitch level when rolling left and right.

The only solution is to keep the travel rates on elevator and aileron the same. The only saving grace for this delima is the EXPO. On my radio (Spektrum and JR), + EXPO reduces the travel towards the center of the stick. On the Futaba, - EXPO does the same. Just be careful of EXPO until you understand how it effects your aircraft.

OK....I have pontificated enough. Just thought I would throw the info your way if you need it or not.

Dave

Exactly right Dave, but there is an answer. A way you can use delta mixing and still have less down elevator than up.
This certainly is the case with Spektrum, and this is what you do...

Go to "programmed mix 1" (or another programmed mix).
Select mix "elevator to elevator"
Select "rate" and move the elevator stick down (the arrow points to the down value).
Adjust to -60% or whatever you need.
Move the elevator stick up and select 0%
Make sure SW is "on"

Job done, the elevator now has less down travel than up, and both servos move the same amount. Aileron function is unaffected.

John

[SafeLandings]

Originally Posted by Boneswamped

Hello Rich,
I have a question, where and how much weight did you use on your AB blades? There have been a couple of different methods, and I want to get it right.
Thanks,
-Mike

Morning Mike,
With the 3 bladed Aerobalsa set up I have no weights in the blades at all, I did once test a weighted set of 3 blades but this did not fly very well, my servos struggled and it was very sluggish.
The only success that I have had with weighted blades is with the 2 blader, without the weights on this type it was very twitchy

Regards Rich

[PeterO_UK]

Originally Posted by SafeLandings

Dave,
On the Tempest with the teetering head , very little roll is needed but plenty of rearward tilt is needed for prespin...I just set the roll dual rate switch to something like 30% but keep the pitch at 100%. That is on a Futaba system and works ok with me
Regards Rich

I do something similar on my models. I have an "extra pitch" switch which gives a couple of degrees of "up trim" which I use during the take-off run on calm days. I try switch it out before the rotors reach flying speed, but it doesn't matter if it lifts off with the "extra pitch" still turned on, it just flies a bit slower!

With a bit of effort on getting your transmitter progamming right you can set both maximum roll and pitch head movements independently. (and even different rates for up and down pitch). You need a modern transmitter and you need to understand how a load sharing heads work.
PeterO_UK

[imsofaman]

LOL! So funny I have had the Dx7 since it first came out and I probably have not scratched the surface of it's real capabilities.

Thanks for the tips guys!! Live and learn I guess...

Dave

[SafeLandings]

Good news...Gary Ten Pas is ready for his maiden ...subject to getting another ESC as his will not work!
Gary has done alot for me so it will be a real honour to see his bird in the air....Good Luck Gary!!


Regards Rich

[imsofaman]

We need photos!!!!