Topic: Omra Makara D Class (Read 180394 times)

AC RAZOR 45 · « **Reply #350 on:** December 12, 2007, 09:46:59 pm »

hi Ian sorry to hear about the boats going,as for the servos i cant really comment about the force on the rudder in submerged drive as to a surface drive i think the rudder area is smaller on the submerged drive so wont need as much power to turn it, i could be wrong,all i know is that mine and a lot of other peoples boats i know needs a high torque 1/4 or mega 1/4 scale servo to turn it especially left at high speed with the of set rudder....AL

omra85 · « **Reply #351 on:** December 12, 2007, 10:27:36 pm »

Al, Ian is correct as you guessed, a submerged rudder is balanced ie there is usually about 30 - 40% of the total area in front of the shaft which counteracts the force on it also, as the whole rudder is constantly in the water, a smaller size gives the same effect as the long wedge rudders we use on surface drive.
Don't forget that, as well as having a strong servo, you also have to beef up the linkage, especially if it is long or there are any bends in it. Linkage flex causes more problems than a weak servo.
Danny

AC RAZOR 45 · « **Reply #352 on:** December 12, 2007, 11:29:16 pm »

hi danny my linkage is 3mm stainless rod, from mark copley...al

ids987 · « **Reply #353 on:** December 12, 2007, 11:34:32 pm »

Cheers Al - a warning to all to make sure your insurance covers your boats, and where you keep them. I had to fight my corner with my insurers, but probably recovered about what I originally spent in the end - so I acquired a new collection pretty quickly.

With regards to servos (and linkages), and turning left, I guess, in surface drive applications - depending where the rudder is in relation to the prop, to go left, the servo is fighting the prop wash to move the rudder. To go right, the propwash may help the rudder - aside from all the other factors.

Bill,

If it doesn't hurry up and warm up, I don't think anyone's gonna be running boats at Fairlands on Sunday.

Ian

AC RAZOR 45 · « **Reply #354 on:** December 12, 2007, 11:49:45 pm »

Thats it in a nut shell Ian,and yes its brass monkies mate,...i'm on with a 60"cat at the moment and there is twin rudders going on that..Al O0l

Bill D203 · « **Reply #355 on:** December 13, 2007, 06:36:34 pm »

Bill,

If it doesn't hurry up and warm up, I don't think anyone's gonna be running boats at Fairlands on Sunday.

Ian
[/quote]
Hi Ian. Me thinks we need an Ice breaker on Sunday. See you at the AGM. 10.30 am

omra85 · « **Reply #356 on:** December 13, 2007, 07:51:04 pm »

Hi Bill
I note from the provisional OMRA calender that Stevenage have not said whether they are able to hold an OMRA race in 2008.
I hope that, with the sad passing of Sid McGown, that someone else takes up the challange of holding an event. Last year, Sid said that the local council were "word not allowed" about, with new rules that put the burden of 'policing' the whole lake onto the SMBC.
There was also some 'rumblings' about safety and racing events a few years ago, which (I believe) came from other sections within the club. There may have been 'hidden agendas' at work but, not being a member of the club, I cannot comment. I do know that - unlike Mayhem, some clubs have certain members who 'stir things up' and do not like anyone in the club catering for anything not directly for members (thats my polite way of putting it). These things have a habit of cropping up again and again at AGM's.
If you can host an OMRA meeting, I'm sure it would be well received and a fitting tribute to Sid's memory as he helped model boating for many, many years. Organisational and practical help would be freely given both before and on the day.
Have a peaceful AGM.
Danny
PS 4th and 18th May, and 22nd June appear to be still available.

Bill D203 · « **Reply #357 on:** December 13, 2007, 08:30:16 pm »

Hello Danny.
Yes Syd's passing away is very sad and i am sure he will be very much missed by many model boaters around the country. I had the pleasure of meeting only about two years ago when i got back into RC boats. During that time he showed me much encouragement.
We are having our AGM on Sunday this week. Syd was our chairman so we have to elect a new chairman. Once this is done the SMBC will be able to start shorting it self out.
As Syd pointed out at this years meeting at Stevenage the local council want so much from the club in the way of money and insurance it makes it almost impossible to run OMRA races.
However we can use or normal lake which has been used for OMRA races in 2006. I know Syd did want to hold a friendly meet on this lake. I would like to hold it in memory of Syd. I did suggest this at club level but I will bring it up again on Sunday. We have all the kit to do the job and many keen folks to set it up. Lets hope others see it my way on Sunday. Bill.

ids987 · « **Reply #358 on:** December 13, 2007, 09:13:51 pm »

Still hoping for some wet stuff to have a run before the AGM (ever the optimist).

Syd will definitely be missed by many. As a face on the circuit, and at the club. His sense of humour, and the qualities Danny alluded to with the "expletive deleted" - although I guess that was all tied in with his sense of humour and attitude to life. I can't think who will replace him as chair of the club. I can only guess at who may or may not stand.
We had a couple of OMRA races on the small lake, and yes, some concerns were expressed, but having done a risk assessment, and addressed the main weak point, we as a club felt (and I still feel) that it's as safe as most venues on the circuit, and safer than some. I thought the concerns had come from one or two within OMRA, but I could be wrong. It's definitely small, but I think most managed to enjoy the races held there, and most adapted their driving to the conditions.
I'll be right with Bill on the proposal.

Although I didn't make it, I hear Syd had a non-religious ceremony for his funeral, and the music included "Always look on the bright side of life". From what I knew of Syd, this really didn't surprise me.

Bill D203 · « **Reply #359 on:** December 14, 2007, 02:43:49 pm »

Hi Ian
Been down the lake to see what the state of play was. The Ice is breaking up, But the big news is the water level is up the best i have seen all year .

Bill D203 · « **Reply #360 on:** December 17, 2007, 07:23:20 pm »

Following Stevenage Model boat clubs AGM I am pleased tell you all that we are planing to hold an OMRA meeting on the big lake here at Stevenage. See OMRA news letter in the new year for more details. Bill.

Bill D203 · « **Reply #361 on:** December 17, 2007, 07:40:02 pm »

O yes i should have put down the date. 4th May.

Blagmeister · « **Reply #362 on:** December 20, 2007, 03:10:37 pm »

Hi Fellas

Well, whilst I have been waiting for some parts to arrive so that I can get on with the build, I thought I'd get on with the paint. I know its a bit @rse about face, but I was getting frustrated at not being able to crack on with it.

It's taken me ages and there have been one or two disasters, but at least now it's presentable at last. I don't think it will give Simon much of a run for his money at the concourse as the paintwork is not as good as I would have wanted it but you live and learn! Anyway here's a few pix. The stringers and engine go in this weekend and I'll be knocking up the electrics box too with a bit of luck.

Cheers!

Phil

2772e · « **Reply #363 on:** December 20, 2007, 06:40:22 pm »

Pretty Boat!!!

Looks better than mine.

Love the graphics!

Look forward to rubbin with you

BW

Simon

Bill D203 · « **Reply #364 on:** December 20, 2007, 06:43:49 pm »

Looking Good!

Bill

omra85 · « **Reply #365 on:** December 20, 2007, 09:10:16 pm »

Nice looking boat Phil.
You may find it useful to keep the throttle open so you can see the roostertail. Some of the lakes facing partially West are very reflective later in the day and a silver and black boat will not stand out very easily.

Still Simon manages well and his boat is (very) shiny blue!

Danny

The previous tip was given by someone who paints his boats with a yard brush and does NOT get jealous ::) ::)

2772e · « **Reply #366 on:** December 20, 2007, 09:19:15 pm »

If all else fails, i know ehere you can get a good deal on "solar film" tee hee

omra85 · « **Reply #367 on:** December 20, 2007, 09:26:10 pm »

Yeh - but not until the old lot falls off! That cost me nearly £4, I'll have you know ::)

AC RAZOR 45 · « **Reply #368 on:** December 20, 2007, 09:29:02 pm »

hi Phil nice job looks really well,its a shame you have to attack it with a drill now as i see no holes for handle or for a lanyard ,i don't see any vents in it or holes in the transom..be carefull.........Al...

Blagmeister · « **Reply #369 on:** December 21, 2007, 08:34:11 am »

Thanks for the feedback fellas. Glad you approve. :)

Danny, I too had a few reservations about the silver colour not being too visible in dodgy light conditions, but then again, it's not that far removed from white which seems to be a popular choice! To be honest, I think I'll probably be going that slowly in the first season that not being able to see the boat will be the least of my worries!

Al, well spotted! I haven't plucked up the courage yet to start drilling big holes in the hull for the strut and rudder etc.!

Although I have to say that I was planning to knock up the stringer frame with an integral transom plate which when it is finally installed will be glassed over and then I will drill through the lot in one go. The transom has a bit of flex in it and as subtlety is not one of my strong points, I thought I had better beef it up a bit!

I also have a couple of ally handles which I was going to fit after I had done pretty much everything else. I am still waiting for some supplies from the US with regard to vents and louvres and stuff and will drill the vent holes when I know the final dimensions of these.

I know it's taking ages, but I am just mindful of the fact that one false move and I could scupper the whole build before it even sees water! ::)

Danny I need to pick your brains if that's ok so I'll PM you

Cheers!

Phil

pete_486 · « **Reply #370 on:** December 21, 2007, 05:50:39 pm »

hi Phil i love the silver and ill bet it looks even bigger in silver and as Al says its a shame all the holes arent drilled,but it looks nice so far.
keep us posted.

seasons greetings........Pete

Blagmeister · « **Reply #371 on:** December 21, 2007, 05:57:13 pm »

Hi Pete

Thanks for that. Glad you approve :) [BTW, please can you check your PM? Ta

]

*UPDATE*

I drilled the holes today, cut out the stringers and transom reinforcing plate and offered up the motor on its mounts.

Just need to sort out the radio box now before I drill the holes for the control arms.

Progress at last!

Cheers

Phil

Bill D203 · « **Reply #372 on:** December 21, 2007, 06:10:51 pm »

One small hole for man kind! One big hole if you get it wrong! I'm looking forwards to seeing you boat at an OMRA meet next year. Have a good Christmas time. Hide in the workshop it upsets the other half every time.

pete_486 · « **Reply #373 on:** December 27, 2007, 02:42:39 pm »

cheers phil and i hide on my pc with a case of stella, im pushing me luck with my other half but she has'nt gone

yet so ill carry on

.

all the best to everyone.........Pete

AC RAZOR 45 · « **Reply #374 on:** December 27, 2007, 10:56:31 pm »

Phil you don't need to go over board with the vents all it needs is 3 x 20mm holes in the front of those boxes on the hatch and the same on the back and to tidy them up after hole sawing, use rubber grommets...mad...AL

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Author Topic: Omra Makara D Class (Read 180394 times)

AC RAZOR 45

omra85

AC RAZOR 45

ids987

AC RAZOR 45

omra85

ids987

Blagmeister

omra85

omra85

AC RAZOR 45

Blagmeister

pete_486

Blagmeister

pete_486

AC RAZOR 45