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Member postings for Levanter

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

Thread: Model vs Trees
17/07/2019 10:20:51
Posted by Peter Jenkins on 16/07/2019 23:53:09:
Posted by Sam Longley on 16/07/2019 18:50:43:
Posted by Levanter on 25/01/2019 07:38:08:

Taken to extreme and the windspeed is greater than the airspeed and the aircraft can appear to stand still or even go backwards! But we all know that is "impossible" in aerodynamic terms zo we readily accept the concept of a headwind. . It also explains the common and infamous stall on the downwind turn.

I suppose it would be too much of a thread drift to ask for you to elucidate a bit more on that onewink

The infamous stall on the downwind leg is caused by pilots thinking that a high downwind ground speed can be reduced by reducing airspeed! The result, is the infamous stall on the downwind leg.

It is quire surprising how many experienced pilots, and even an examiner on one occasion, do not understand the vital difference between air speed and ground speed.

An earlier comment by Simon Cragg falls into that category.

Where things do get confused is when you are descending through a wind gradient (that is wind speed reducing as you approach the ground - exactly like the boundary layer on the wing). In this case, you need to increase your approach speed when landing otherwise as you descend your airspeed will drop away as the speed of the block of air reduces. That is unless you have a very light foamy that immediately reacts to the change in airspeed.

Aerodynamics is not something most model pilots have studied. Where they have it tends to be at a very basic level. Some of us who post on here actually have studied aerodynamics to degree level, have done flight test courses and flew full size power and gliders. It's up to you if you wish to ignore the advice but don't complain when you end up with a broken aeroplane because you ignored the advice.

Hi Sam

Peter has answered your question for me and almost certainly made a better job of it too.

Thanks Peter

Levanter

Thread: TE`s
14/07/2019 05:16:07

HI Bill

Certainly a leading edge can be made any size. For me it is just easier to handle and fair in. I make the first strip just wide enough and bevel to match the top and bottom of the rib with a razor plane, protecting the ribs with masking tape.
The second piece is again cut just wide enough and then a few swipes with a razor plane again gets the profile very close. Finished off finally by sanding.
I don't think it is necessarily any stronger but for me, me better to get a good profile.
Other's may find other methods better / easier

Levanter

Thread: Keil Kraft Caprice CoG
13/07/2019 18:40:01

I built one of those in my teens and I doubt I had the faintest idea what a CoG was for. I think it had a lifting tailplane and maybe it tolerated a CoG quite well aft.

I tested it in long grass just in case but remember it flew very well just floating around. I certainly can't remember adding any more weight but it was a long time ago.

Levanter

Thread: TE`s
13/07/2019 10:36:12

Bill

Reading your post I think you probably mean LE (Leading edge).

I like the two layer / strip system that Peter Miller uses a lot.

I don't like the BIrd's Beak because it creates a weak spot in the rib and if there is a knock on the leading edge it tends to cause a split. This method uses square section stock which is quite easy to fit and requires minimum sanding but I still don't use it.

Levanter

Thread: Waterproof glue
07/07/2019 09:42:38

That's a good looking boat Percy and some interesting projects in the pipeline.

Have you been over to the Model Boats forum. It runs at a snails pace compared to this one but lots of useful knowledge to tap into.

Ray Wood has initiated a mini mass build" with HMS Cossack. A famous destroyer with the model designed by Vic Smeed. I am not really into warships but as it will be something completely different for me I am going to give it a go. There are four of us so far.

Levanter

07/07/2019 07:40:56

Den

I have built a number of floats and just use my favourite aliphatic glue which is water resistant when fully cured.

As Percy says, covering with glass cloth is a good thing to do and I cover the float completely using epoxy. This gives a tough and totally waterproof coating. Some people can't use epoxy for allergy reasons or prefer other products but the results are more or less the same.

I am planning a build of a Bombardier CL-415 water bomber and I am going to glass the whole fuselage with epoxy and then paint.

I build models boats and have an RC racing yacht. Water has a habit of finding its way in somehow so it is important to thoroughly drain and dry the interior otherwise it won't necessarily just be the glue that fails.

Levanter

Thread: Car indicators
06/07/2019 14:22:48
Posted by Martin Harris on 06/07/2019 13:20:49:
Posted by Levanter on 06/07/2019 12:04:44:

On the "motoway" going into town (Palma) there is a shunt a day at the moment often as not with a holiday makers hire car in the sandwich.

Cash for crash scam targeting hire cars?

Risky scam Martin seeing all that bent metal.

The other thing I find curious here is that only the police and the Guardia Civil have flashing blue lights. The ambulances (which are mainly run through private clinics) and fire service only have flashing orange that doesn't show up anything like as well. Equal status to a digger, crane, oversized load etc. Must be a macho thing but I am sure it costs lives.

Levanter

06/07/2019 12:04:44

Tailgating is taken to an art form in Spain. You get blocks of cars that look like centipedes going down the road.

On the "motoway" going into town (Palma) there is a shunt a day at the moment often as not with a holiday makers hire car in the sandwich.

Last week two in one day and one of them was just four cars in front of me. You have to work hard to keep a safe space because anything greater than a car's length and someone fills it. I haven't worked out the maths but theoretically you could go backwards laugh

I drive an Audi and don't like my indicators that have a mind of their own.

Levanter

05/07/2019 21:03:55

I have seen this elsewhere but the first time I saw it was in Turkey where there was a 20 second countdown to the green light. So many people were killing themselves and other jumping the lights and I believe it had some use.

Side effect though was that every traffic light became a Formula 1 start with everyone revving to go.

Don't start me on driving instructors. They catch them early here. (Spain)

Levanter

Thread: The demise of. ASP/SC
05/07/2019 20:12:37

I have an MDS something or other in a second hand plane that I bought on a whim.

After hearing so much about the engines I was quite shocked when after a quick prime and one flick, it burst into life and ran like the proverbial sewing machine. It's a keeper and I quite like the look of the double taper on the head and cylinder.

Looks like I might have been lucky.

Levanter

Thread: Car indicators
05/07/2019 19:00:04

Driving in Spain can be taxing at times but it does however prepare you a bit for driving in Italy. The most anarchic country I have driven in has to be Greece.

Interesting thing about Spain is there is virtually no road rage. The Spanish are blissfully unaware of the dangerous goings on. If you resort to a the horn you just get a bemused look and presumably they put you straight down as a foreigner.

Horn though, if you are a micro-second late getting away at the traffic lights, prepare to be deafened.

(oops I forgot Turkey)

Levanter

Thread: Oodalally
01/07/2019 17:25:20

Lovely model Les

Must kickstart my build to get it finished. Mine has an inverted Saito.

Levanter

Thread: Prop selection for glow to electric conversion
29/06/2019 08:37:49
Posted by Percy Verance on 29/06/2019 07:39:43:

Hi Alan

None of us flying in November? I'm out flying all through the Winter if the weather plays ball.....

Hi Percy

I think the comment relates to your point where you said you might be boating from November wink

Providing of course you are not iced over!

Levanter

Thread: No Auto Rotation
28/06/2019 14:34:39

John

It is definitely negative incidence. I have built Richard Harris's Atom Special where it is explained in a number of build blogs. I think you will find that it is the spinning disc that has the positive incidence to create the lift and not the individual blade's relationship with the hub.

Opposite to helicopters where the rotor is driven rather than impelled. 3D helicopters can vary the pitch either way.

I am sure Richard will be back to explain much better than I.

Levanter

Thread: Li`l Cub
17/06/2019 22:29:22

Very nice Martin

Sorely tempted to have a go myself. Do keep us posted.

Levanter

Thread: Good news thread.
14/06/2019 19:18:18

Been working in Greece this week. Won't say anything about the weather laugh

First day having lunch and there was a copy of RCME on the table left by some kind person. The issue with Peter Miller's L'il Cub and with the plan inside. Rapidly gifted by the staff who saw I was some kind of aero-nut.

Some reading matter for the evenings and a new build to add to my list.

Happy chappy.

Levanter

Thread: If I fit floats to my Senior Telemaster will I need a more powerful engine?
09/06/2019 11:28:27

Be prepared

This chap was.

Agree with Don on the water rudder(s)

Levanter

09/06/2019 09:47:47

David

All of the above.

If you have been pulling gliders you should have more than enough grunt to pull the floats.

The only thing I might add concerns longitudinal directional stability. Many floatplanes both full size and models have a vestigial fin under the existing fin to give a bit more area aft of the floats. This is because the floats sit well forward to prevent nose-overs (well that's the idea wink)

Levanter

Thread: Good luck to the BMFA
08/06/2019 21:40:10
Posted by Doc Marten on 08/06/2019 16:08:08:
Posted by john stones 1 on 08/06/2019 14:53:44:
Posted by Doc Marten on 08/06/2019 14:36:23:
Posted by john stones 1 on 08/06/2019 13:01:39:

Roll on the day the BMFA puts a final update out, and these threads become a thing of the past.

You could always scroll past them.......

I could scroll past them, but I would miss calls from the BMFA to reply in support of them, I often find it here when I haven't checked emails for a while. Plus how would I know the content of the thread, without looking ?

Any other advice for me ?

Plenty.

Here's some more; Replying to every post isn't compulsory after reading it, especially if it's the same as you've said on every other associated topic in another attempt at getting it closed because it irritates you.


I just knew you couldn't resist.

Edited By Doc Marten on 08/06/2019 16:27:25

Did you not notice that I didn't reply to your latest "vigilante" prod.

The point of this thread is to wish the BMFA luck and as far as I can see they are going to need it based on certain contributions.

Levanter

Thread: Drone harassment
06/06/2019 18:15:16
Posted by Doc Marten on 06/06/2019 17:33:33:

Levanter, what would be your suggestion?

Not being a vigilante.

Levanter

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