Here is a list of all the postings Engine Doctor has made in our forums. Click on a thread name to jump to the thread.
|Thread: Judder on all servos with DFT module|
Can anyone shed any light on the following ? I recently obtained a FrSky DFT Futaba Tx module . I don't need or want any telemetry and am using a Vr8 11 Rx
Have set the switches on the back according to the instructions for use with this Rx , Binds instantly but all servos judder as if the frame rate is wrong . I have checked back on much earlier post and there were some dodgy modules in early batches. This one I was assured is from the later batch so in theory should be ok . Were there any fixes found ?
|Thread: Can I have two Life batteries powering my Futaba receiver?|
I use schottky diodes 1000v 10Amp . You can buy them online 10 for a couple of pounds.
They will lower the voltage of a pack by about 0.25 to 0.5 v but if you use 5cell NiMh or two Life cells there isn't a problem.
|Thread: DB Hurricane paint and finish.|
You can now get water based Evo Stick contact adhesive. Probably more expensive than copydex was but don't know if copydex is still available. There is also a similar product to copydex used by carpet fitters , might be worth investigating ?
Edited By Engine Doctor on 08/12/2019 08:07:35
+1 The foaming glue works well on veneer and any that foams out can easily be sanded off when cured . Will need a plastic sheet with heavy weights spread over area to hold it down as its very powerful when it expands .
Jon Be careful with the CoG on the DB Hurricane . I built one some years ago and the CG was exactly as per the plan . First flight proved otherwise . Needed moving an inch further forward for pleasant flying.
The full size was I believe the same . I have read it somewhere in the past that the first Hurricanes that were delivered were just about flyable due to a rearward CoG and one officer refused to fly it in service until it was corrected . The article said they all had a large lead weigh attached to the firewall and an extra trim tab to counter this .
DB was was a stickler for copying the full size .Everyone I know who has had a DB said that they had to move the CoG forward from that on the plan . As you say wing loading isn't too much of a problem with such a large wing although the U/C mount can be loosened in a less than perfect landing if not built strong . The one I built had the built up wing and the U/C mounting was incredibly strong after all the mounts were strengthened with tri-angular stock .
Good luck wit it and hope you get away with sticking the veneer down .
Edited By Engine Doctor on 07/12/2019 12:01:37
Edited By Engine Doctor on 07/12/2019 12:02:49
Edited By Engine Doctor on 07/12/2019 12:06:28
|Thread: Valve work|
Hello Winco . Sorry for late reply but trying to sort out the club subs renewals for 2020 with the added CAA and optional card business !!!
Cutting a slot is a good method especially if the bolt is knackered anyway and its accessible . For the head bolts use a good quality HSS Allen driver link . They are sharp and grip far better than ordinary allen keys . Clean out the socket in the bolt head before inserting the allen driver so as to make sure the driver fits right into the socket . An old sharpened small allen key is ideal for this as they are pretty useless for undoing allen screws. Also a sharp tap on the end of the allen driver with a light hammer usually loosens them . Dont forget to undo and do up diagonally and dont over tighten them . Do replace any damaged/rounded bolt with a decent quality bolt when re-building.
Good luck and let us know how you get on
Edited By Engine Doctor on 06/12/2019 15:05:34
|Thread: Radio Queen ailerons|
|Thread: Valve work|
You could try squirting some Plus gas around the valve to get it moving .Cam followers are prone to getting stuck if the engine is poorly stored for a long time and will hold the valves open when the cam pushes them up and they stick. Agian a squirt of plus gas will usually free them with a little finger pressure . It would be wise though to strip off the head and remove valves to clean the stems and seats .Once the head is off remove valve collets in a big plastic bag . That way if you slip you will be able to find the collet.. To clean the valve stem and head I put it in an electric drill and use an old razor blade etc to remove any thick carbon then fine wet and dry paper to finish off . I use fine valve grinding paste thinned with either a drop of paraffin or thin oil to re-seat the valves. You can test the seat quickly by putting a few drops of thinners into the inlet and exhaust and check for leaks . As the valves or follower are are stuck I would also check the rest of the engine for any gumming or corrosion as this can Kill an otherwise good engine in seconds . A quick look in the cam box and in the back of the engine (take off the back-plate) and you will see if there is any corrosion to worry about . Its worth checking as the 80 is a powerful old lump and generally good runners ..
Edited By Engine Doctor on 02/12/2019 11:14:28
|Thread: A new caption competition - winner declared!|
"You climb over and get it !" "NO you climb over"
Someones fly tipped and old airframe over here !
|Thread: Medway MFC indoor flying Sun 8th December . Gillingham Kent|
Medway MFC indoor flying this coming Sunday , December 8th 2019 at Medway Park Leisure Center Gillingham Kent ME7 1HF For more details go to ; http://www.doddington-kent.org.uk/MMFC/ This will be the third indoor session this autumn /winter Further sessions will be held on the second Sunday of each month through to march 2020 Sessions run from 10 am to 3 pm Costs £7.50 to fly for adults (children get a reduced rate). £1 spectators. BMFA membership/ insurance required to fly. Please bring BMFA cert. There will be a free bring and buy table , just put a donation in the Air Ambulance box if you sell anything, and a raffle . All profits go to our club charity the Air Ambulance Kent,Surrey and Sussex. please come along have a good fun day and help support a worthy charity . In the last year we have raised £1769 for the Air Ambulance so pleas come along and support a worthy cause .
|Thread: The Gov't, CAA, BMFA & UAV legislation thread|
As per Ken Andersons thought Dept .Too many barrack room lawyers over analysing and confusing readers Lets have a simple how too from the likes of Andy Simmons and lock the thread
|Thread: 'Starloc' adhesives.|
I used to use there stuff and liked the glues etc but many flyers I have spoken to tried ordering by post and never got any goods or refunds . Steer clear for now and buy from other dealers .
You can buy decent Cyano in 50 gram bottles from Tool station About £4 a bottle . They only do a medium and thick though
Edited By Engine Doctor on 27/11/2019 14:45:51
|Thread: TX stick/gimbal direction guide plate?|
. You can achieve the same function on other simpler computer sets by just set end point adjust to 0% or switching required channel/s to Off or Inhibit.
|Thread: Hobby king delivery charges|
The rules around posting batteries are mad . If I go to the post office and try to post some batteries they refuse point blank no matter what type of battery . Then I order some batteries NiMh from a company in the UK and they are delivered by the royal mail with no problem ? is it one law for consumers and another for business ?
|Thread: Metal Tanks|
What happens when you click on the link ? Its always worked in the past ?
You could try logging onto www.forum.medwaymfc.org.uk if that works click on
Ben Buckle designs in traditional models then onto BB Taylor Craft and scroll to bottom of page one .
Edited By Engine Doctor on 22/11/2019 17:19:25
|Thread: How do you attached to those solid inners on snakes?|
I haven't seen those solid snakes around for years . The inners are very handy for threading bits through wings or fuselages etc . Do you need that particular type ? Newer types with a hollow inner are easier to secure linkages and are easier to find . Golden rods do a lighter weight snake for lighter models in a red outer yellow inner combination .
PS just read the post with pics link showing a crimped end which is probably best way to secure .
SJ Do you use a dedicated crimping tool or will a wire/plug crimping tool work ?
Edited By Engine Doctor on 22/11/2019 11:21:23
|Thread: Metal Tanks|
Hello D for D . As in other post just make tanks with a butt joint , no tabs needed. Copper will usually occur with glow fuel that contains Nitro Methane , the high the content the quicker the errossion, If that's the correct term , of copper . It will dissolve the copper from bass tube leaving a brittle porous tube of blackened Zinc . Any fuel residue left in the tank will go a dark green colour . Never experienced it it with diesel fuel though .
Some pics of making tin tanks here . Hope its of some help . When you have finished soldering and testing the tank half fill it with some cellulose thinner to dissolve any flux/resin that can block fuel tubes . |Guess how I found out about that .
Edited By Engine Doctor on 22/11/2019 11:06:26
|Thread: Best Heating Option For Your Hobby Shed|
The exhaust pipe does get really hot so drilling a hole through the brick would be your best and safest option removing any worry of damage to door frame or possible fire . You can buy extra lengths of exhaust tubing quite cheaply.
A good sealant for any joins or filling in around pipe and brickwork would be car exhaust putty that sets hard when heated.
If I had the room I would run the exhaust through an old radiator that would act as a silencer and give extra heating that would otherwise go to waste .
|Thread: Foam Model Repair|
A bit of bad luck there .Looking at the pic I would if possible, in addition to the foam replacement fit a carbon spar/tube into the wing , extending as far as possible into the wings and through the repair as you can without compromising the retract units . As the wing is cracked right on the fuselage joint it will have to support the flying loads so a spar might help stiffen a compromised wing.. Good luck and show us any repairs as I am sure plenty of us ill be interested how you get on .
|Thread: How to remove glue from ARTF before recovering....|
+ 1 for Acetone .
|Thread: Help! Twisted wing|
Hello Phil . just a thought but when you shrunk out the diagonal wrinkles did yo do both side of the wing ? the reason I ask is that I told a club member how to do this some time ago and they said it did'n't last long so I said come round to my place and we will sort it . I did the top of the wing while he held it then said keep the twist on and turn it over so that I can shrink the other side and he had a light bulb moment .
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