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Search: Posts Made By: Malcolm H
Showing results 1 to 25 of 55
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Forum: Electric Pattern Aircraft
04-03-2021, 12:23 PM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

I like the D3! Malcolm

I like the D3!

Malcolm
Forum: Electric Pattern Aircraft
04-03-2021, 11:40 AM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

The thing you have to remember with the D3 is...

The thing you have to remember with the D3 is that it is basically a governor drive. RPM will be directly proportional to throttle stick position up to the maximum RPM the ESC was programmed for....
Forum: Electric Pattern Aircraft
04-03-2021, 10:15 AM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

As long as your outlet area is sufficient that...

As long as your outlet area is sufficient that looks ok!

I think I would message Adam at his Facebook page and ask his opinion.

https://www.facebook.com/debowski.adam


He is normally very...
Forum: Electric Pattern Aircraft
04-02-2021, 08:44 PM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

Having used the D3 extensively, it is highly...

Having used the D3 extensively, it is highly unlikely that this is a problem with its programming or construction.

Being a small and lightweight ESC it has minimal heat sinking capacity and this...
Forum: Electric Pattern Aircraft
02-24-2015, 10:19 AM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

Hi Brenner, Yes I thought that might be the...

Hi Brenner,

Yes I thought that might be the case, although you could look at a spinner shaped front prop nut and do away with the existing front spinner cone. This might give you a few more...
Forum: Electric Pattern Aircraft
02-24-2015, 07:23 AM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

Hi Brenner, Yes I'm sure that testing is the...

Hi Brenner,

Yes I'm sure that testing is the way to prove the new setup.

On another matter, have you done any experimentation on prop separation and noise? If an increase in separation produces...
Forum: Electric Pattern Aircraft
02-24-2015, 04:55 AM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

Hi Brenner, Of course I'm well aware the...

Hi Brenner,

Of course I'm well aware the drive uses the planetary gearset and you are right I'm not thinking about a torque induced failure but the possibility of a pure bending moment being...
Forum: Electric Pattern Aircraft
02-24-2015, 01:11 AM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

Brenner, Two scenarios which would concern...

Brenner,

Two scenarios which would concern me regarding motor shaft bending are:

a) A nose over on landing or a hard touchdown causing a blade to contact the ground. (This happened to me on an...
Forum: Electric Pattern Aircraft
08-28-2014, 03:49 AM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

Yeh Jason, Realised that but assumed most...

Yeh Jason,

Realised that but assumed most people keep an eye on anything remotely Contra related!

I guess you will be able to test fly wearing shorts at Christmas unlike some of us :-)

M
Forum: Electric Pattern Aircraft
08-28-2014, 12:36 AM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

Hi Peter, I was hoping that someone else...

Hi Peter,

I was hoping that someone else would step in here and offer some advice because I'm in danger of hogging this and the Allure thread with my opinions!

I will give you the same advice I...
Forum: Electric Pattern Aircraft
08-25-2014, 11:54 PM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

Leonardo, Your timings are going to cause...

Leonardo,

Your timings are going to cause you problems. With the dead time set to 0.6 sec you will be well down a vertical before the brake even goes to initial setting. There is no reason to set...
Forum: Electric Pattern Aircraft
08-24-2014, 07:52 AM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

Leonardo, The fact that you are running a...

Leonardo,

The fact that you are running a high gear ratio should mean that when braking your motor is turning faster and you should get more retardation of the props for a given braking setting...
Forum: Electric Pattern Aircraft
08-23-2014, 11:18 AM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

Leonardo, What gear ratio are you running? ...

Leonardo,

What gear ratio are you running?

Malcolm
Forum: Electric Pattern Aircraft
08-22-2014, 12:33 AM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

Leonardos, With my Neu motor setup otherwise...

Leonardos,

With my Neu motor setup otherwise identical to yours I have similar setup except have initial brake set to zero and. final brake only around 30% and this is more than enough. I think...
Forum: Electric Pattern Aircraft
05-30-2014, 11:33 AM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

Flew my Oxai Hybird converted to Contradrive...

Flew my Oxai Hybird converted to Contradrive today.

Excellent first session and it looks like another viable Contra model to add to the list.

Malcolm
Forum: Electric Pattern Aircraft
04-20-2014, 09:45 PM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

Thanks Niall, Malcolm

Thanks Niall,

Malcolm
Forum: Electric Pattern Aircraft
04-18-2014, 10:31 PM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

Very nice Niall, Is that the standard Oxai...

Very nice Niall,

Is that the standard Oxai landing gear extended or something else?

Malcolm
Forum: Electric Pattern Aircraft
08-21-2013, 03:54 AM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

I think you are right Brian M

I think you are right Brian

M
Forum: Electric Pattern Aircraft
08-21-2013, 12:01 AM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

Yes they do! I see it's Ulsamer's model so...

Yes they do!

I see it's Ulsamer's model so he should know a thing or two about props. What's very interesting is the pitch difference between the front and rear it looks like 22" rear and 14" or...
Forum: Electric Pattern Aircraft
08-15-2013, 04:16 AM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

You don't see many contra powered full size...

You don't see many contra powered full size aircraft flying these days but what I had forgotten about the Gannet was its small additional vertical surfaces on the stab. I wonder if the designers...
Forum: Electric Pattern Aircraft
07-02-2013, 01:03 PM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

RE: Contra Rotating Propeller Drive for f3a 2m Pattern Planes

Sorry last post typed on phone late at night here. Should have read:

"In level flight" and "while pushing"

Malcolm
Forum: Electric Pattern Aircraft
07-02-2013, 01:01 PM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

RE: Contra Rotating Propeller Drive for f3a 2m Pattern Planes

So if this effect is gyroscopic it will only apply forces to the model when the angle of the spinning mass is changed with respect to the direction it was travelling. i.e. it will precess.

If...
Forum: Electric Pattern Aircraft
07-02-2013, 04:45 AM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

RE: Contra Rotating Propeller Drive for f3a 2m Pattern Planes

Very interesting Brenner,

So is this a steady state trim condition or one exhibited during a push or pull? I'm going out on a limb here and would hypothesize that this is an aerodynamic effect...
Forum: Electric Pattern Aircraft
07-02-2013, 03:56 AM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

RE: Contra Rotating Propeller Drive for f3a 2m Pattern Planes

Hi Brenner,

OK I have been waiting for someone else to ask this so that I'm not the one that looks stupid but I guess its down to me to ask!

Over on the Episode thread you stated in respect...
Forum: Electric Pattern Aircraft
07-01-2013, 04:29 AM
Replies: 2,031
Views: 682,200
Posted By Malcolm H

RE: Contra Rotating Propeller Drive for f3a 2m Pattern Planes

Hi Brenner,

No I haven't seen any Seba drives being used in this part of the world other than by Seba himself and another San Marino guy at a FAI World Cup Event in the England last year.

...
Showing results 1 to 25 of 55
 
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