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Member postings for PeterF

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

Thread: Insurance costs
07/04/2020 21:25:12

You can get specialist model cover for your models and equipment from Walker Midgley See their website, this covers the items at home for things like fire and theft and in transport I believe, but it will not cover crash damage. If you fly larger models it is easy to exceed limits on some home insurance policies for contents of outbuildings.

Thread: New 78" Vulcan for twin 90mm DF
05/04/2020 21:11:37

Martin,

The fans are from Exreme RC in Australia with 90mm machined alloy shrouds fitted with Ejet Jetfan 90mm 9 blade rotors and HET 650-68-1600 motors. On 8S they should pull about 100A and give 4.5kg thrust.

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Thread: Control Horns on larger models
05/04/2020 21:00:53

M2 ball links on mine, 4mm od x 2mm id carbon tube placed over the 2mm threaded bar. It is a 1/4 scale tiggie but not the flair kit. More detail on my thread 1/4 scale tiger moth build on this and the next page.

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Thread: Printed parts in strong sun.
05/04/2020 00:16:10
Posted by Barrie Lever on 04/04/2020 23:03:44:

Peter

ESUN don't mention any enhanced temperature resistance in the data for PLA +, do you have other information?

B.

Barrie, I was put onto this brand by someone else who had used it stating PLA+ was better, you have made me check the technical literature and the eSun PLA+ has similar softening performance as standard PLA, so I am wrong on this. It is not as brittle apparently. Oops. Still it has printed very well and has a good surface finish and has glued well, just not as heat resistant as I expected. Thanks for pointing this out.

Edited By PeterF on 05/04/2020 00:16:59

04/04/2020 21:08:10

The HT PLA is I believe the same as the PLA plus I mentioned above which the Stearman was printed with, I used eSun brand.

I have printed ABS on my Anycubic Mega S but it needed a bed temp of 105 degC to stop lifting and the only way I could achieve this temp was by placing some sheets of cardboard around the machine and one on top to make a sort of enclosure. It still had some gaps in so it did not get too hot inside, it just stopped most of the air movement.

04/04/2020 12:27:33
Posted by Ron Gray on 04/04/2020 10:21:57:

Heat will affect it, I know this is extreme but this shows what can happen:

Salvador Dali goes model flying.

I will bear this in mind when I take my Stearman out, I am yet to fly it because it was finished during lockdown.

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Thread: New 78" Vulcan for twin 90mm DF
04/04/2020 12:20:03

Greg,

In my professional life before retiring I was involved in the designed of high velocity fluid flow components and a rounded lip on the entrance to a duct is as good as a shallow cone in keeping flow disturbance to a minimum, both answers are equally as valid.

Craig,

Have you made any further progress on your build.

I have started glassing and have completed the fuselage. This was the stage I was not looking forward to. I have only glassed a plane once and that was 15 years or more ago and it did not turn out very well, it needed a lot of sanding and a lot of high build primer and turned out overweight. It was a DC3, needless to say extra weight on a plane with heavily tapered wings was a bit of a nightmare.

I watched the videos by Danny Fenton "Glassing my Way" and "Hawker Fury Mk1 fuselage glassing" and I have followed those methods using the foam brushes and peel ply. I wish I had seen this years ago because it has been a lot easier than my first attempt and has resulted in a good even lay down of the cloth with good adhesion and very few areas with excess resin. I used West Systems epoxy 105/206 and glass and peel ply from East Coast Fibreglass supplies.

The only thing I have found is that the foam brushes start to break up after a while, perhaps I am too rough with them, having a pack of 20 means I have lots available to keep swapping as soon as any black bits appear on the glass cloth. I have used both resin addition methods, adding it to the surface first then placing the cloth down and placing the cloth on dry then adding the resin. I can not make my mind up which is the best yet, the end result appears to be identical.

Fin and wing join reinforcement panels glassed with peel plydsc08839.jpg

Upper fuselage completed ready for sandingdsc08862.jpg

The majority of the bottom of the fuselage glassed in one mammoth session. This was done in two halves with an overlap on the centre linedsc08852.jpg

First side of the peel ply being removeddsc08857.jpg

Underside of the fuselage completed ready for sandingdsc08866.jpg

Thread: Printed parts in strong sun.
04/04/2020 09:50:13

I have not flown my 3D Lab Print plane yet so I can not answer your question, but I am also interested in any answers that you get. Because of this concern, I printed using PLA plus which has a slightly higher softening temperature.

Thread: Show Us Your 3D Prints
03/04/2020 17:31:10

I have designed and printed some servo covers / holders in a couple of sizes. They were designed in TinkerCAD which I find is quite reasonable for designing basic components like these. I did show these on the TN 78" Vulcan build thread, but here they are again for those that have not seen that thread. Rudder and elevon servos.

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Thread: Has Your Club Made Any Decisions Regarding The Coronavirus?
02/04/2020 17:34:12

Glassing my Vulcan, can only do a couple of hours a day as I work through it a bit at a time. Whilst waiting for epoxy to set I have scraped the barrel for jobs and cleaned the block paving drive today with one of those wire brushes on a stick. Been avoiding it for ages so it has earned copious brownie points.

Thread: Flat Car Battery from non-use of car
01/04/2020 09:38:33

I have left my car for 5 weeks before without it being a problem.

I would not advocate using a LiPo, car starter battery currents are typically many hundreds of amps, car batteries tend to be rated for things like 600 amps when cranking a cold engine.

Thread: Forum members' new models: Let's see them.
29/03/2020 18:26:00

No view out for the pilot, I guess that makes it funky.

Thread: New 78" Vulcan for twin 90mm DF
29/03/2020 10:18:34

Craig,

I did not take any in build pics of the ducts. I made up a single sheet of balsa larger than required but did not glue it into a tube. I soaked it and then formed a tube smaller than the intake with a loose overlap and inserted into the hole. Once in the hole I expanded it to fit, marked off the diagonal front of the intake and the point where the overlap came to. I then removed the sheet, cut back to the diagonal lines leaving some spare and cut back some the spare overlap, but not all of it. I then refitted the sheet to recheck the overlap position, removed it and made the final cut. I then glued it into a tube and inserted it for the final time, but to get it in it needed to be soaked again and one of the flat faces bent inwards to make the overall size smaller than the hole. Very fiddly.

28/03/2020 23:30:04
Posted by Greg Minden on 28/03/2020 21:38:41:

Looking good. I became worried that the flat bulkhead next to the fan intake would reduce efficiency and power so decided to fair in the inlets to the fan. Seemed like a good idea and my thrust measurements would agree

My view on this is that with a full lip on the fan inlet, it should not matter as this will feed the air smoothly into the fan and the inlet area is larger than the FSA so that air flow will only need to change direction and accelerate at the fan inlet. The proof will however come some time in the future as I will not be cutting the access hatches until I have glassed the fuselage.

28/03/2020 20:44:16

I have added the inner sheeting in the inlet ducts. I have made this full lenth back to the former with the fan inlet to give a smoother flow area for the air going to the fans. The corner infills have also been added. I have fixed the rudder in position and added the spine along the top of the fuselage.

That about finishes the majority of the build. Now to start sanding and filling in preparation for glassing, parcel arriving Monday from East Coast Fibreglass Supplies. That will keep me occupied for the next 2 weeks of lockdown (or more).

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Thread: Forum members' new models: Let's see them.
27/03/2020 19:41:41
Posted by Peter Miller on 27/03/2020 18:10:45:

The engine is impresive.

I wonder if I can persuade my Dremel 3D printer to make one of those

There are a few radial engine models on Thingiverse of varying complexity

9 cylinder radial engine

Dummy 9 cylinder radial front half

3Dlabprint do not sell the files for the Stearman engine seperately, but they have some larger ones for B-25 and Corsair, page through their shop.

3D LabPrint shop

27/03/2020 17:42:19

Here is the result of a completely different type of build to my normal models, a 3Dlabprint Stearman. It is fully 3D printed, even the flexible rubber tyres and the coils in the main undercarriage legs. I bought a 3D printer late last year to make some parts for the TN Vulcan I am building. I then found out about the 3Dlabprint models and thought I would try one. It took a bit to get some of the settings dialed in for the special type of printing used in these models with many trials runs before choosing the best ones. It took about 150 hours to print and assembly was pretty much straightforward. There is no painting on this, the model was printed with yellow, blue, black and grey coloured filaments. The radial engine is all printed and looks rather good in my opinion, although it is stretching a cheap basic hobby 3D printer to its limits to print the cylinders. Looking forward to the maiden. Part way through the print I was sorting through my pile of old RCM&Es and found an article on this model from July 2018 that I had forgotten all about, although the RCM&E review was of a set of parts printed by a commercial outfit.

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Thread: Probable scam?
05/03/2020 19:38:01
Posted by Peter Miller on 05/03/2020 18:25:15:

I think I have a new one.

A very convincing email from my internet provider telling me that my Direct debit has been cancelled. and giving me links to give my details. Oh yes!! I am sure!!!! Not a snowballs chance.

I went and checked on my bank account and it still has not been cancelled.

Funny you should mention this as I have just dealt with, i.e. hit the delete button, exactly the same thing.

Thread: New 78" Vulcan for twin 90mm DF
23/02/2020 19:54:49

Leading edges, wing tips, inner elevators and outer elevons now all completed. The only bit that has given me some pause for thought was how to build the outer elevons with the reflex built into the outer half of these, none of the surfaces were flat to build them on the board in the normal way. I have tried to sand the trailing edge of th wing tip blocks to follow the reflex on the outer part of the elevons.

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Edited By PeterF on 23/02/2020 19:55:30

Thread: The Gov't, CAA, BMFA & UAV legislation thread
17/02/2020 19:15:00

One thought crops up, more than 20% of the members in our club either had no DoB or a shortened first name / nick name in the BMFA membership. Despite the BMFA emailing all members with email and me doing the same (club sec) I had to chase up individual members to get the correct information. I expect that the CAA have probably been given a set of data with a lot of erroneous data in and that there will be a significant number of modellers that do not get a number because they fail the government ID verification. These modellers will not get their number in the next 7 days and will need more time. Perhaps the CAA were expecting to receive only good quality data.

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