Dimpled Dumpling -Building Hints Wanted

Gold member

Dave or anyone that knows.
I notice from the pictures that the lead-out line spacing vary on some models. Are we allowed to rake the rear lead-out foward nowadays? Also what are the current rules on venturi jets? Are we allowed "banjo" style jets but with a single hole as we used to be? Do you know if the Rothwell 250 comes with peripheral jets?
Cheers

Mega Poster

By my reading of the rules, the lead out position must be left as on the plan. Peripheral jets are allowed as before. I think the Rothwell does have one but don't take that as gospel as I don't have one of them. By the way, the Haywoods use a wick feed type and get good results from it.

Gold member

Thanks Terry, i'll build mine with the same centres as the plan in that case.
What's a good weight all up for a D-Dumpling? My brain has forgotten so much over the last 5/10 years. I think mine and Ridleys werew about 375/380g, does that sound too light?

Also Noz, is that the same model in your pictures? It must be the perspective but the U/C looks alot more foward in the side view than it does in the top view. Is moving it right foward the done thing nowadays?
cheers.

Gold member

Craig,

All the pics are of the same model, we have quite substantial U/C as I can be a little heavy handed.

Dads models are usually 400g ish, he made this one under and I test flew it and got him to put more weight in it, so this one is over 400g, but is a much more "Slicker" model, and so lost 1.5/10 over last years model with the same engine.

The model is the one that won us the NATS this year, tho' the tank is different now. We find this position gives minimal bounce when landing.

As for the NVA, we don't us a wick feed, it's dads own variation, an OS 10 I think. Gives a cracking setting, and easily set. Ken Newbold uses the same needle as a wick feed on his 1/2A and we all know how stinkingly fast that is!!

Mega Poster

Simo - sounds like you'd better get one of those needles.

Gold member

Cheers noz. wow,1.5/10 with just a model change! I'll aim for 375g and that way will end up with 400.
I built 2 tanks today for a new pair of Dimpled Dumplings, i usually start with the wings as i hate making them but i was in the mood for building tanks. Everything is slow going, my aim is to get 2 slick models and atleast 1 fasti-sh motor by spring.
What's a good rotational speed for 10 laps on the new length lines?

Gold member

I think around 21/10 is good, we haven't been under 20 yet.

Gallery Admin

I started to build a DD last winter then got into Goodyear so put it to one side until now. I now want to finish it but am a bit concerned having read the recomendations from Noz regarding the undercarriage.

I have copied the undercarriage wire as shown on the plan and secured it to F1. Bearing in mind the recomendation to make the undercarriage long and well forward would it be best for me to change it now before progressing too far with the build, or will it be OK as shown on thee plan?

It also looks like chicken hopper tanks are the favourite, does this indicate the tank drawn on the plan is a no good?

Many Thanks
John B

Obsessive Poster

John B
I think that I may have built as many Dimpled Dumplings as anybody.
I drew up the original plan faithful to the original model and then a revised plan to ensure practicality but to retain the original concept of the design. I would leave the undercarriage where it is shown on the plan as the VTR rules do not allow it to be moved fundamentally.
Also the tank shown on the plan works fine with all the engines I have used in the model. ie Gen Oliver Mk111 and 1V, Frog 249BB, CS Oliver,
Repro Eiffie Special. Just make note of what I have indicated about the weight factor[ If the plan you have is a copy of mine].
Excluding our Nationals winners the best performance John and I ever did was a 7minute dead final with a genuine Mk 3 Oliver. This was at an Oakington Final and we lost the race by a couple of seconds to John Green
the season he was on fire. Finish the model John and fly it you will love it. I will see you in the circle.
VTR Pres.

Gallery Admin

VTR PRES,
Many thanks for the information, I will continue.
Work on the model did come to a stop when I smashed my genuine MK 111 Oliver last year!

Yes I do hope to race it this year and wonder if you can give me some information about the VTRSIG, I don't seem to be able to find any contact information?

Thanks
John Bowman

Mega Poster

Obsessive Poster

For those who dont know or for those that are interested, The VTR SIG is an organisation whose remit is to police the Vintage Team Racing in the UK. The Chairman is MIck Orchard tel 01923 448072. Secretary at the moment is to be elected. Mick will give you any details you may need. Members receieve a good newsletter about 3 or 4 times a year that is always worth a read. Fellow contributor on the Forum, Terry Macdonald compiles all the result info.
Simpler still come to any VTR meeting, bring a model and a pitman and have a go. The CD, usually me, will see that you can get involved in the racing in a way that you wont feel intimidated at all. I can guarantee that if you do you will be hooked for life.
VTR Pres.

Mega Poster

Thanks, Pres, that's the clearest and most helpful thing I've seen yet,

Sorry for any "silliness" on my part regarding this matter, hope to be racing a DD soon myself,

Simon.

Mega Poster

Pres, did you mean you wouldn't fly newcomers against Tony (whose height would intimidate a dwarf like me any time)? Really though the VTR fliers are a nice bunch, you don't see the teddys being thrown out of the pram as often as in some other events. (the names have been concealed to protect the innocent!).
Any pilot or pitman seeking advice will have it freely given and will be welcome. Don't try any sneaky tricks on the Jury though, Stu Robinson knows them all and spots them quickly. I wonder how he knows them so well?
Simon you'll be treading in famous footsteps as Paul Stanley (a former UK Combat champion) flew a Voodoo Mark I many years ago with Ian Horne pitting. Mind you, he had to control a tendency to chomp at the man in front's elevators!

Gold member

Hi David
Have you finished the DD yet. Did the pics of my DD help. So if you have finished the toy have you got some pics