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Member postings for Howard Tomlin

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

Thread: Engine choice for Graupner Extra 300s?
10/05/2009 19:05:17
Update:
 
I've been having a lot of trouble getting the laser to run properly due to the carb being positioned below the tank and also airflow.
 
Unfortunately today the laser shed its inlet tappet during a trial flight, which led to the engine losing all power.
 
I judged that I had plenty of height so I ruddered it around ( This is where it all starts to unravel- I should have carried on in a straight line) and whilst turning it started to drop a wing,
 
I let it recover some airspeed in a dive and attempted to return to level flight at which time it tip stalled and fell - literally- out of the sky. Tthis time too close to recover, smash!, in it went.
 
Damage was terminal, wing sheared in half on starboard side 1/2 way along, fuselage broken in half and bulkhead torn out.
 
 
I got it home and removed the radio and engine, and traced the fault to the inlet tappet
 
 
I was surprised to note the general lack of glue!, this was shown by the way that the bulkhead and other parts came apart, all along the glue lines.
 
 
Perhaps this is the way of the ARTF, light and cheap due to lack of glue????
 
Ah well onwards and upwards!
 
Thread: Panic biplane
18/03/2009 12:46:22
I bought on of the new artf's in white, its great!
 
I fly mine with a saito 90 Twin cylinder, looks awesome on show bolted to the airframe for all to see and pulls it around the sky like a train.
 
Prop hanging,  tail slides, blenders, flat spins , harriers, I could go on and on but seriously there is nothing it can't do.
 
my first panic (circa 1988) flew for the sum total of 5 seconds before it was totalled - my dad had the elevator servo reversed and looped it on take off into the deck - full chat !
 
My second panic is an original with foam wings etc..  its 99% complete after a total rebuild and re-cover - soon I will fly this one again.
 
My third panic is the artf one mentioned above.
 
I think its great how ugly it is, some of my fellow club members cant stand anything which isnt scale so I can see the pain on their faces when they see it on the flight line.
 
Ok, its not a scale biplane plane, but its a biplane so has a lot of  character, and mated to a beatiful looking 4 stroke twin with a distinctive twin engine beat, couple that with being able to pull every trick in the book and great flying performance - It mess's with their minds!!!!

Edited By Howard Tomlin on 18/03/2009 12:47:53

Thread: Acrowot Build
21/01/2009 21:34:53
 
 
nylon doped fus, glass cloth wings, tail in tissue and dope?
 
have you gone mad?
 
just solartex it!
 
 
talk about making work for yourself, that acrowot I had was solar tex'd and painted with cans, looked great!
 
I'd be interested in the all up weight of your model cos it sounds like its going to be verrry heavy.
Thread: 4 strokes Fuel - Presurize or Not
18/01/2009 06:58:23
John,
 
I'm going to try your suggestion, it is very tightly cowled so this might help.
 
Are you using the grey rubber tubes with the corrugated bend in them used to angle the exhaust away from the plane?
 
Thanks for your suggestion.
 
Howard
Thread: Laser 80 Engine
13/01/2009 22:39:00

my 75 went like a train on a 12x6 prop!

 too many years of castor fuel have lead to coked up exhaust valve, but it still soldiers on.

 my laser 90 has been a pig by comparison, and my laser 150 blew its bottom end out in flight due to oil starvation.

 I honestly prefer saito now , however you cant beat that laser noise!

Thread: 4 strokes Fuel - Presurize or Not
13/01/2009 22:30:00
Kit Morpeth wrote (see)

Thanks engine doctor for a very comprehensive reply.

The target model is a Glens Extra and the engine is a Laser 80 4 stroke. I was very leery about fitting it upside down although aesthetically this would be best. I think now I shall act on all this advice, fit the engine upside down but with the tank as low as I can practically get it and a breather pipe to outside the bottom of the cowl and no pressurisation. I shall let you know how it pans out

KIt


i'm running a laser 90 in a graupner extra (patty wagstaff jobby), its inverted and absolutely has to have pressurisation as it wont run well (if at all without it).

 I've had a shed load of trouble making it work, the carb is way way lower than the bottom of the tank as the engine is inverted, this leads to it running ok on the ground and then goes rich in the air!! the complete opposite of what you would expect.

 I've tried rotating the spray bar to control the amount of fuel that gets drawn in to the carb and thats made little difference. The only real way to tune it is to have it running really lean on the ground and fingers crossed it doesnt go rich in the air.

 I'm seriously thinking of doing away with the aesthetics and mounting the bl**dy thing sideways!

 If your glen is as heavy as my extra then i think you may find the 80 a little underpowered too, sorry to break it to you...

Thread: Saito 90T twin, which prop?
13/01/2009 22:20:00

I'm putting the twin in an avicraft panic, and am wondering which prop to use for maximum funflyage.

 Would a 13x4 be suitable? IF not then whats your thoughts.

Many Thanks

Howard

Thread: Ailerons
15/12/2008 20:59:00
wow!, spelling pedants are rife on this forum!
Thread: Junior 60
12/12/2008 17:06:00

To be fair (or Flair!!) the magnatila is a good trainer.

Thread: Acrowot Build
12/12/2008 00:14:00

they fly very nicely on a gold old laser 75 and a 12x6 prop (yes i know it was under propped but it never complained and went like stink)

 loads of prop clearance too!

Thread: Junior 60
09/12/2008 19:56:00

well its horses for courses, you'll know when you're running before you can walk as your instructor will tell you so (and tailor your lessons to suit)or you'll attempt a flight on your own too early and possibly stuff it in.

You'll gain confidence quicker with a model that you're not frightened of, and believe me there's nothing frightening with a junior 60.

With the right instructor and a standard aileron trainer you'll get your confidence in time, and you will be straight on to ailerons

 the timescale is down to how quickly you get your confidence up and in some cases its easier to get confidence with a slow flying easy to take off / land model like a junior 60 and then move on to a  4ch.channel model.

One advantage with a 4 channel trainer is that they generally have more "penetration" in windy conditions as any model with a light wing loading and loads of dihedral (junior 60 etc.) can be flipped around when a gust gets under the wing.

 Why dont you try someone elses 4 channel trainer with your instructor to see what the difference is and see which you think you will make more progress with?

 I'm also a very keen advocate of flight sims ( phoenix etc.) as these can teach you the basics, in any weather , from your living room. Stick time is everything and a sim can give you that stick time to get you confident with the model. Of course its only 90% realistic as in real life when you stuff it in you need to repair not just reset, but you will find that you can be adventurous with your flying and learn what works and what doesnt. I'll bet you money you'll pull off a nice (sim) landing within a week....

BTW. are you flying buddy lead?- this makes a big difference to the time allowed for the rescue of a plumetting trainer - if your instructor is on the ball the situation shouldnt arise in the first place....

Howard

09/12/2008 17:13:00

I learnt on a super 60 rudder elevator only,

then progressed to a rudder elevator tinker  biplane,

then a hepcat, rudder elevator vintage thing,

then a howard metcalfe models (are they still around?) moonraker a smy first aileron trainer,

Acrowot

Wolfgang Matt "joker" pattern ship,

 and on and on and on up to the models i have now which are mix of scale,3d, pattern mono and biplanes.

having a plane which will fly itself (if all else fails) is a bonus,  the confidence you will have when moving to ailerons will be much higher if you have some rudder elevator experience.

I still fly rudder elevator, and the guy i'm teaching to fly at the moment is using a radio queen on rudder elevator and is doing very well!!

Thread: How do you Fly
09/12/2008 17:07:00

I always try to fly both models that i take, i always have a spare in case i get a problem with one.

You're not alone in noticing the people who turn up without models (just for the social - which is fine)

Thread: Phoenix flying session arrangements/times
27/11/2008 16:47:00

what time, what site, what password?

 I will be under the name of maverick

Thread: What R/C flight simulator?
26/11/2008 09:18:00

the latest version of phoenix now includes a flying club in moscow and a new apache helicopter in elec, nitro, and turbine version.

Thread: Brian Taylor Corsair F4u
21/11/2008 18:52:00

Hi Andy!

 I'm sure someone will be along soon....

Thread: ZN Line Madness 2 anyone flown one?
21/11/2008 17:32:00

:bump:

Thread: Acrowot Build
20/11/2008 13:14:00

I had one of these when they first came out and I only finally managed to prang it beyond repair 2 years ago (and it went in hard at least 3 times!).

 Mine was built as per the instructions and flew (very well) on a laser 75, it was a little nose heavy but this didnt affect its flight characteristics and it always put on a good show (sometimes to a round of appluase!!).

 I wouldn't worry about shortening the nose to suit the engine, the laser I used isnt exactly the lightest engine in the world and I didnt shorten the nose , anyway  i think this would bring more problems than it fixes as theres not a huge amount of room up front anyway!

 As for careful consideration on covering, you'll find solartex or sloarfilm etc are all perfectly acceptable, I painted my solartex covered acrowot with fuel proof paint to look like this:-

 

http://i107.photobucket.com/albums/m308/hman_01/Acro-Wot.jpg

 The union jack is a p.i.t.a. to paint so i wouldnt reccomend doing this if you havent tried on something else first.

 I cant rememeber whether the u/c is plastic or metal bolt on stright out of the box but i used plastic bolts which were fine and stopped the u/c fixing section from ripping out on a hard landing.

 Overall its a great perfoming plane, i doubled all the throws and found this to be a most satisfying setup for some really hairybatics!. flick rolls are very quick, knife edge spins are very easy ( both sticks in the top left or top right corners after a vertical climb!!), it will blender quite well and I even got a prophang or two from it!!

 Alas a silly mistake with losing all the expo settings during a tx reset resulted in an over correction when recovering from a knife edge spin,and misjudgement of how much space i had resulted in it slapping the ground at full chat at the bottom of a hard yank up

The result, :-

wings sheared in two down the joiner line,

bulkhead removal (complete with cowling,engine and spinner in one unit ending up 35m from the impact point) ,

u/c plate removal

I could have epoxied it all back together but I'd done this repair a couple of times already and it was time for it to fly  into the graveyard. - Funnily enough when i hand launched it into the council waste sites skip it glided beatifully as if to show that it had life left in it ....

Thread: Legitimate sport?
20/11/2008 12:39:00
Ernie wrote (see)

Surely, a real sport, needs some form of physical exercise, as a fundamental part of it...So, motor racing are not sports. ernie

Nope!, and anyway Motor racing is termed as motorsport nowadays

Thread: Phoenix version 2.00
07/11/2008 14:28:00

Glad you like the tweaks!!! 

 (I had an email discussion with the team at phoenix about this and they asked me to give them the correct control surface movements for all the scale models - which I did and I am glad to say they included my tweaks  in the version P update!!)

i'm quite chuffed really...

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