Hobby King Dyna jet

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noclassmac1972
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Hobby King Dyna jet

Post by noclassmac1972 » Mon Oct 28, 2013 2:11 am

As far As I know Hobbyking have now started producing the dyna jet for sale. The price is a unbelievable $95 usd for a engine and mounts and sparks unit.. THese are selling out real fast.. For those who wanted a dyna and could never afford one heres your chance.. I believe they brough the tooling off Curtis ??? But could be wrong. I have one that should arrive this week so will put it thrpough its paces. They will also stock Valves shortly and I bet the price will be very very good..

Regards
Robert Bolton
( Kiwi Jet Squad )

MKinDarwin
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Re: Hobby King Dyna jet

Post by MKinDarwin » Mon Oct 28, 2013 7:50 am

I am aware I would need to find a suitable fuel tank for one of these, is a fuel pump required?

noclassmac1972
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Re: Hobby King Dyna jet

Post by noclassmac1972 » Mon Oct 28, 2013 7:56 am

No Fuel pump required as they run on suction very well

Robert

nitro
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Re: Hobby King Dyna jet

Post by nitro » Wed Oct 30, 2013 2:02 pm

They are on ebay now to.Price is going up.could buy for $65 at first.

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Re: Hobby King Dyna jet

Post by Mark » Wed Oct 30, 2013 6:26 pm

There is also someone now doing a buy it now for $198.50. I guess since he shows the ignition system and other tidbits included it looks like a good deal because you had to pay a lot more in the not too distant past for a Dynajet with ignition and parts. It was a HobbyKing engine, HobbyKing ignition, and their mounting parts.
Presentation is Everything

Mark
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Re: Hobby King Dyna jet

Post by Mark » Sat Nov 09, 2013 10:15 pm

A couple of reviews. Funny, both go on about the tailpipe not being round. Neither is my real Dynajet purchased in the 70's, but the welding job is pleasing to the eye. In some way, I kind of like the way the two blanks have a hint of ovality, especially at the flared tail end, perhaps an unintended stylishness, different from the norm.
http://www.youtube.com/watch?v=TX0GfRXU5vk
http://www.youtube.com/watch?v=_4Qnp-quN48
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gettylee
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Re: Hobby King Dyna jet

Post by gettylee » Wed Nov 13, 2013 2:45 pm

I've talked to Curtis Dyna fog personally,they did not sell the tooling to Japan,its just a copy.

nitro
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Re: Hobby King Dyna jet

Post by nitro » Sun Dec 01, 2013 12:34 am

I have started my two with my own flowjector,spark plug & buzz box.Goes good .Just about 10mm shorter than my OS pulse jet from 1950.Almost as much thrust as it.Only the Red head has a different thread in it so the OS,Dyna jet & Bailey Flowjectors cant go straight in.Just run a Tap in so they can.change these parts for better ones & run Methanol. Not methylated spirits a it has ethanol in it .Need a 1.6mm main jet to. Cheep est way to fix all this is file,cut ,Lathe-some of the thread off the stock spark plug so the center sticks right to make a 3.5mm 360 Deg spark .Mount it at 7 O'Clock.Connect a car spark plug lead to it.Run earth back to car spark plug then run car .Flowjector can be fixed to but need photos to show how.I cant do that here.

Mark
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Re: Hobby King Dyna jet

Post by Mark » Sun Dec 15, 2013 12:05 am

Presentation is Everything

Chook
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Re: Hobby King Dyna jet

Post by Chook » Wed Dec 18, 2013 11:26 am

Spare reeds for it are now here. $1.99 for 5
http://www.hobbyking.com/hobbyking/stor ... _Bag_.html

:D

Golddustpeak
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Re: Hobby King Dyna jet

Post by Golddustpeak » Sat Dec 21, 2013 1:20 pm

Chook wrote:Spare reeds for it are now here. $1.99 for 5
http://www.hobbyking.com/hobbyking/stor ... _Bag_.html

:D
Has anyone seen and measured these reed valves?
Will they fit anything else?

noclassmac1972
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Re: Hobby King Dyna jet

Post by noclassmac1972 » Sun Dec 22, 2013 3:55 am

These reeds will fit the Dyna jet , Bailey Sportjet, Jetbill sportjet and the OS jet, and probably a few more that take the dyna style reed.. These reeds are very very well made

Robert Bolton ( Kiwi Jet Squad )

MANOLO
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Re: Hobby King Dyna jet

Post by MANOLO » Tue Jan 21, 2014 1:15 am

MI 1 FLIGHT hobbyking pulsejet engine..... trainer,,,,
:lol: :lol:
https://www.youtube.com/watch?v=lxQrR9c ... 4-overview
Image

gerre
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Re: Hobby King Dyna jet

Post by gerre » Tue Aug 18, 2015 10:32 pm

Hi all,

I've had alot of problems trying to start my HK pulse jet ( see the attachment)
I get bangs and sometimes it seems very close to getting into resonance,
but I'm afraid I'm still doing something wrong. I used 60psi compressed air
and 95 octane gasoline as fuel.

During the first test yesterday I just aimed the air pistol at the blowpipe of
the flowjector instead of using a tube to connect the air pistol with the blowpipe.
Could this be the problem? I'm going to try again tomorrow with the neoprene tube
between the flowjector and the air pistol. (see attachment)

I also noticed that alot of fuel gets blown out of the inlet.

Does anyone have an assumption of what can be wrong?

Thanks in advance! :)
Attachments
engine lineup.PNG
Engine line-up
DSCN1548.JPG
Blowpipe and air pistol

Mark
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Re: Hobby King Dyna jet

Post by Mark » Thu Aug 20, 2015 2:18 pm

Is that a fuel pump you are using? Why don't you try a straight line to the fuel tank and have it so that the fuel level is just about 1/2 to 1 inch from going into the metering jet. Then when you puff in air in short bursts, check to see that the fuel is getting drawn in. It sometimes helps if the jet is somewhat hot. I think 30 psi should be enough starting air pressure. You could check to see if the petal valves are aligned over the holes and maybe run water through the metering jet to make sure there isn't a a burr of metal or obstruction of some sort. Maybe you could try angling the air in not using the blow pipe but that's sometime tricky and you can end up pushing the fuel back toward the tank instead of drawing it in.

https://www.youtube.com/watch?v=68MRkGxhvRE
Presentation is Everything

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